Beetles Identification Guide

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176 Fig. 232 Alphitophagus bifasciatus (Say). Scale = 0.5 mm.
Economic importance: In North America A. bifasciatus is a minor pest. Adults and larvae feed primarily on fungi and molds. They occur mainly in damp, moldy grain and spoiled cereal products found in granaries, grain elevators, mills, and warehouses. The species is also found in natural conditions under the bark of trees and in decaying vegetable matter (Triplehorn 1965). Blapstinus substriatus Champion Diagnosis: Among the tenebrionids discussed here this species is distinctive in having the eye completely divided into a dorsal and a ventral lobe. Blapstinus metallicus Fabricius is another species found occasionally in stored products. In Canada the species occurs from Nova Scotia west to British Columbia. The adults differ from those of B. substriatus mainly by the shape of the pronotum: its anterior angles are prominent, and the lateral margins are straight to slightly sinuate in the posterior half. In B. substriatus the anterior angles are only slightly prominent, and the lateral margins are rounded. Sexual dimorphism: Males have the first 3 segments of the fore tarsi dilated and densely pubescent ventrally; females have these segments of the fore tarsi neither dilated nor pubescent ventrally (Fig. 269). Distribution: Exclusively North American. In Canada the species occurs from Quebec west to British Columbia; it is apparently more common in Saskatchewan, Alberta, and British Columbia. Economic importance: This species is found occasionally in granaries and grain elevators. Its feeding habits are unknown. Cynaeus angustus (LeConte) larger black flour beetle Diagnosis: The species differs from the other tenebrionids included here by the combination of size (length 5—6 mm), slightly incised eyes (width 3 or 4 facets laterally), and strong microsculpture on the disc of the pronotum. Sexual dimorphism: Sexes are externally similar. Distribution: Exclusively North American. According to Dunkel et al. (1982), the species originated in the southwestern United States or Mexico and spread progressively north and east in the 1920s and 1930s. It was first recorded in Canada in the 1940s and has since been found from southern Quebec west to Alberta. Economic importance: So far, this species is not a serious pest in Canada but 177
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BEETLES associated with stored prod
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© Minister of Supply and Services
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ACKNOWLEDGMENTS I am indebted to L.
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INTRODUCTION This book is intended
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Trogoderma inclusum LeConte Trogode
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IDENTIFICATION KEYS Key A GENERAL 1
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Hind femur without or with small to
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33(31) Pronotum with 6 large teeth
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Key B ANTHICIDAE 1(0) Integument of
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Key C CRYPTOPHAGIDAE 1(0) Antennae
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16(15) Pronotum with anterior angle
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Elytra covered mostly with white or
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Key E LATHRIDIIDAE 1(0) Elytra with
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Key F NITIDULIDAE 1(0) Abdomen with
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Elytra moderately hairy, strial pun
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9(8) Eye about 3 facets wide latera
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Figs. 9—21 Antenna (dorsal view).
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Figs. 32—38 Pronotum and elytra o
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Figs. 48—56 Elytra of (48) Anthic
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Figs. 66—74 Head and pronotum. (6
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Figs. 89—98 Anterior half of body
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Figs. 109—117 Head and pronotum o
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Figs. 124—132 Elytra and exposed
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Figs. 146—155 Head (lateral view)
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IDENTIFICATION PLATES 49
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Fig. 170 Stored-product beetles wit
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Fig. 172 Stored-product beetles wit
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Fig. 174 Stored-product beetles of
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GENERAL INFORMATION This section co
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Fig. 176 Lasioderma serricorne (Fab
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Fig. 177 Stegobium paniceum (Linnae
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Sexual dimorphism: Males have 2 exp
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combination of having the surface o
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Fig. 179 Araecerus fasciculatus (De
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Fig. 180 Dinoderus minutus (Fabrici
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Sexual dimorphism: Males usually ha
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Fig. 182 Acanthoscelides obtectus (
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tibia; females lack such projection
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on the anterolateral margin of the
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Distribution: Cosmopolitan but more
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Fig. 186 Atomoria ephippiata Zimmer
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those of C. distinguendus Sturm, a
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Economic importance: As mentioned f
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Economic importance: As mentioned f
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Woodroffe, G.E.; Coombs, C.W. 1961.
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the Coleoptera dealt with here by t
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Fig. 190 Cryptolestes turcicus (Gro
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Fig. 192 Oryzaephilus mercator (Fau
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David, M.H.; Mills, R.B. 1975. Deve
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Fig. 193 Sitophilus granarius (Linn
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Most species feed almost exclusivel
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Fig. 194 Anthrenus scrophulariae (L
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Fig. 195 Attagenus unicolor (Brahm)
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successful in rearing the species o
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have recently become serious pests
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probably surviving on the remains o
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Fig. 199 Reesa vespulae (Milliron).
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Fig. 200 Thylodrias contractus Mots
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Fig. 202 Trogoderma glabrum (Herbst
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with insecticides, and in a short t
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Economic importance: The species is
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Fig. 203 Mycetaea subterranea (Fabr
Page 125 and 126: Fig. 204 Carcinops pumilio (Erichso
Page 127 and 128: Fig. 205 Aridius nodifer (Westwood)
Page 129 and 130: Fig. 206 Cartodere constricta (Gyll
Page 131 and 132: Twelve species of Corticaria have b
Page 133 and 134: Fig. 208 Dienerella ruficollis (Mar
Page 135 and 136: Fig. 209 Enicmus fictus Fall. Scale
Page 137 and 138: Diagnosis: Among the lathridiids di
Page 139 and 140: Fig. 212 Thes bergrothi (Reitter).
Page 141 and 142: Fig. 213 Litargus balteatus LeConte
Page 143 and 144: Diagnosis: This mycetophagid differ
Page 145 and 146: Selected reference Parsons, C.T. 19
Page 147 and 148: Distribution: Throughout the temper
Page 149 and 150: Economic importance: In Canada this
Page 151 and 152: Fig. 219 Omosita colon (Linnaeus).
Page 153 and 154: PTINIDAE spider beetles About 15 sp
Page 155 and 156: Fig. 221 Mezium affine Boieldieu. S
Page 157 and 158: Fig. 222 Niptus hololeucus (Falderm
Page 159 and 160: Distribution: Japan and introduced
Page 161 and 162: Fig. 224 Ptinus fur (Linnaeus); mal
Page 163 and 164: Fig. 226 Ptinus ocellus Brown. Scal
Page 165 and 166: The species was recorded in Canadia
Page 167 and 168: foodstuffs in the Vancouver area. I
Page 169 and 170: Fig. 229 Trigonogenius globulus Sol
Page 171 and 172: which they apparently prey; those o
Page 173 and 174: STAPHYLINIDAE rove beetles The Stap
Page 175: In North America as well as in Brit
Page 179 and 180: Fig. 234 Cynaeus angustus (LeConte)
Page 181 and 182: Fig. 235 Gnathocerus cornutus (Fabr
Page 183 and 184: Fig. 237 Palorus ratzeburgii (Wissm
Page 185 and 186: Fig. 238 Tenebrio molitor Linnaeus.
Page 187 and 188: Sexual dimorphism: Sexes are extern
Page 189 and 190: or 2 facets). It is most similar to
Page 191 and 192: Halstead, D.G.H. 1967. Biological s
Page 193 and 194: side margin of the head and the ant
Page 195 and 196: Figs, 248—256 (248) Anthrenus fus
Page 197 and 198: Figs. 260—263 (260) Tribolium cas
Page 199 and 200: Figs. 267—269 (267) Pseudeurostus
Page 201 and 202: facet A lens-like unit of the compo
Page 203 and 204: Fig. 270 Tenebrio molitor (dorsal v
Page 205 and 206: LITERATURE CITED Adams, R.G. 1978.
Page 207 and 208: Ghorpade, K.D.; Thyagarajan, K.S. 1
Page 209 and 210: Smith, L.B. 1962. A note on Cryptol
Page 211 and 212: coffee bean weevil ................
Page 213 and 214: pea weevil.........................
Page 215: 215
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