Bumble Bees

Studies on Scandinavian Bumble Bees61treated as being conspecific, the latter consideredas a subspecies of the former, cf. p. 69. Therather srnall, well-defined area on the chartoccupied by B. cingulatus is moreover noteworthyand emphasizes the specific position ofthis taxon. B. cingulatus was, with exception ofthe designator and Boheman (1857), treated asa variety of B. hypnorum until Reinig (1936)re-established its specific rank.BOMBUS (PYROBOMBUS) CIIIGULATUSWAHLBERGBombus cingulatus Wahlborg, 1854, pp. 207 ,208-209, lectotype ? TCL ! selected by Ander(1967). Type loc. Sweden: Norrbotten: Nederkalix: Yttermorajiirv.(Bombus cingulatus Wahlberg; Wahlberg 1855 ;Boheman 1857, p. 17; Reinig 1936; Kruseman1959; Elfving t960, 1968; Laken i960; Ander1965; Bombus hyphorutn var. c Thomson 1872;Strand 1898a. Bombus hypnorum yar. cingulatusWahlberg; Friese 1902; Aurivillius 1903 ; Bengtsson1903 , 1904; Sparre Schneider 1909, 1918 ;Friese & Wagner I9I2; R.ingdahl tr915; Lundblad1924; Soot-Ryen 1925; Meidell 1934a;Laken 1949, 1950.)First Scandinavian recordsNorway. Troms (TRi): Mfllselv: Nordmo(Sparre Schneider 1909).Sweden Norrbotten: Nederkalix: Yttermorajiirv(Wahlberg 1854).Queen, workerMorphological characters. Malar space as longas distal width or just So, exceeding the lengthof A, but shorter than Ar* r. Disc of clypeusalmost impunctate centrally, otherwise with singlycoarse punctures in between sorne very fine onesand with well-separated lateral impressions whichare broad and with sparse, coarse punctures.Labral furrow moderate, varying in width butnarrower than /s the labral width ; labral tuberc-les usually densely punctured at the base, themicrosculpture smooth or indistinctly alutaceous.Ao just shorter than distal width or equal to it.Longest hairs in posterior fringe of hind basitarsusexceeding half the greatest width of thesegment. Surface of Tn-u with more or lessalutaceous microsculpture and moderate puncturing.T6 strongly alutaceous, dull, the puncturingrather dense, even, often with indicationof longitudinal median furrow and distally moreor less dimpled. Coat shaggy, less dense than inB. hypnorum.Queen measurements: N - 15; SE Norway;malar space: 0.58 mm ( +O.OZ +0.01) range:0.53-0.60 mm:''radral length': 3.75 mm (+0.11+0.03) range: 3.50-3.90 mm; interalar width:4.48 mm (+0.14+0.04) range: 4.18-4.65 trnm.Body of small to medium size.The smaller specimens of the workers weredifficult to distinguish from ,8. hypnorum.Colour pattern Pile of vertex yellowish-brownencroached by black hairs; dorsum of thorax,including narrow adjacent edge of episternum,yellowish-brown except for a more or less pronouncedinteralar band not reaching the extremeposterior margin of mesonotum. Pile of Tr,anterior margin or anterior lunate part of T2yellowish-brown; about distal half of Tu, entireTu- u, at least lateral paft of fringes of Stn-u,Sta whitish; otherwise coat black.Variation. Pile of vertex predorninantly or entirelyblack. Black hairs on dorsum of thoraxranging frorn a few single hairs on the disc to awell-defined interalar band. Occasionally, workershave no black hairs on dorsurn thorax, and awell-defined interalar band is only observed inqueens. Hairs on T1 more or less replaced byblack ones, preferably in lateral tufts. Occasionallyhairs on T'-2 completely black. White hairson T4 ranging from covering about distal halfof the tergite to a few hairs along the distalmargin.MaleMorphological characters. Malar space about aslong as distal width and as long as Arn r. Antennaeshort (Fig. 35A) i A' about % the lengthof Au, equal to Ao or just longer I An as long as5. Bumble Bees.