▁of ▁the ▁sub gener a . ▁ ▁Description ▁and ▁identification ▁ ▁Bomb us ▁v os nes ens ki i ▁has ▁a ▁number ▁of ▁distinct ive ▁features . ▁These ▁include ▁short , ▁even ▁hair , ▁the ▁rounded ▁angle ▁of ▁the ▁bas it ars us , ▁which ▁is ▁the ▁middle ▁leg , ▁and ▁a ▁square ▁face . ▁Additionally , ▁the ▁fr ing ed ▁hair ▁of ▁its ▁h ind ▁legs ▁forms ▁the ▁cor b ic ula , ▁or ▁pol len ▁basket . ▁ ▁Queens ▁are ▁between ▁ 1 8 ▁and ▁ 2 1   mm ▁long . ▁Work ers ▁are ▁between ▁ 8 ▁and ▁ 1 7   mm ▁while ▁males ▁are ▁between ▁ 1 0 ▁and ▁ 1 5   mm . ▁ ▁Queens , ▁workers , ▁and ▁males ▁all ▁have ▁medium ▁length ▁anten na e ▁and ▁similarly ▁sh aped ▁and ▁s ized ▁eyes . ▁They ▁are ▁pattern ed ▁with ▁black ▁and ▁yellow ▁hair s . ▁The ▁queen ▁and ▁the ▁female ▁workers ▁are ▁almost ▁always ▁identical ▁in ▁color ing . ▁They ▁have ▁almost ▁entirely ▁black ▁thor ax es ▁with ▁stri pes ▁of ▁yellow ▁at ▁the ▁head ▁and ▁at ▁the ▁T 4 ▁segment ▁of ▁their ▁thor ax . ▁The ▁male ▁d ron es ▁mostly ▁look ▁similar ▁to ▁their ▁female ▁counter parts , ▁but ▁in ▁some ▁cases ▁will ▁have ▁more ▁yellow ▁on ▁their ▁sides ▁that ▁extends ▁farther ▁up ▁the ▁back ▁of ▁the ▁thor ax . ▁ ▁Distribution ▁and ▁habitat ▁ ▁Although ▁historical ▁data ▁for ▁insect ▁distribution ▁is ▁sparse ▁in ▁western ▁North ▁America , ▁it ▁is ▁clear ▁that