INSECTS OF MICRONESIA Coleoptera: Platypodidaeand Scolytidae'

W ood-Platypodidae and Scolytidae
KEy TO MICRONESIAN SPECIES OF H YPOTHENEMUS
1. Frons rather strongly impressed on lower half, with a rather definite transverse
elevation at upper level of eyes ; larger, 1.25-1.55 mm...... .. ...__.... 31. areccae
Frons convex, without a transverse elevation at upper level of eyes; smaller, less
than 1.25 mm.. . m __ ••• m m m 2
2. Interstrial rows of erect setae scalelike on both disc and declivity of elytra 32. eruditus
Interstrial setae scalelike on disc, almost hairlike on declivity 33. mangarevanus
31. Hypothenemus areccae (Hornung).
Bostrichus areccae Hornung, 1842, Stett. Ent. Zeitung 3: 117.
Bostrichus boieldieui Perroud, 1864, Soc. Linn. Lyon, Ann. 1864: 188.
Stephanoderes fungicola Eggers, 1908, Ent. Blatter 4: 216.
Hypothenemus basjoo Niisima, 1910, Sapporo Nat. Hist. Soc., Trans. 3: 9.
Cryphalus oreccae, Hagedorn, 1910, Coleopt. Cat. 4: 40.
Hypothenemus areccae, Hopkins, 1915, U. S. Dept. Agric ., Rept . 99: 14.
Stephanoderes areccae, Eggers , 1922, Ent. Bericht. Amsterdam 6: 86, 1929,
Wiener Ent. Zeitung 46: 55.
Stephonoderes hispidus Eggers, 1925, Ent. Odd. Nar. Mus. Praze, Sbornik
3: 156 (n. syn.) .
Hypothenemus capitalis Beeson, 1935, B. P. Bishop Mus., Bull. 142: 102
(n. syn.).
Hypothenemus eupolyphagus Beeson, 1940, B. P. Bishop Mus., Occ. Papers
15 (18) : 193 (n. syn.).
Hypothenemus oahuensis Schedl, 1941, Hawaiian Ent. Soc., Proc. 11 (1) :
110 (n. syn.).
Female : Length 1.25-1.55mm., 2.5 times as long as wide ; color brown.
Frons with a short transverse elevation at upper level of eyes, moderately impressed
below (very similar to some examples of Stephanoderes hivaoea) ; surface reticulate and
finely punctate at sides and above elevation, smooth and shining below; vestiture
inconspicuous.
Pronotum equal in length and width; widest at base, sides very feebly arcuate and
converging on basal half, rather broadly rounded in front; anterior margin armed by six
serrations, lateral ones a little smaller; asperities rather coarse and numerous; posterior
half reticulate, rather finely punctured laterally, becoming granulate behind summit; vestiture
hairlike, intermixed on posterior areas with slightly longer, scalelike setae.
Elytra 1.6 times as long as wide, 1.6 times as long as pronotum; striae indistinctly
impressed, punctures moderately large, deep; interstriae slightly wider than striae, punctures
minute, rather close, confused. Declivity steep, convex; strial punctures somewhat
smaller than on disc. Vestiture consisting of stria! and interstrial hair, rather abundant
and longer on declivity; and uniseriate rows of erect interstrial scales, each scale rather
slender, about 3 to 5 times as long as wide and about as long as hairlike setae.
Male: Similar to female except smaller, about 1.0 mm.; eye reduced in size; one or
more serrations may be absent from anterior margin of pronotum; declivity not as abrupt ;
striae less definite; and elytral pubescence longer.
DISTRIBUTION: Southern Asia, East Indies, Hawaiian , S. Mariana ,
eastern Caroline, and Marshall Is.
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