1863.] 87 
§§ Abdomen yellow, reddish or fulvous and black. 
■\ Apex yellowish or fuj^ous. 
3d, 4th or 5th segments black...Sp. 25—29. 
ft Apex blade, 
1st and 2d segments yellow and reddish ; rest black.Sp. 30. 
1st segment yellow, 2d, 3rd and part of 4th reddish.Sp. 31. 
1st and part of 4th segments yellow, 2d and 3rd reddish.Sp. 32. 
“ 2d, 3d & part of 4th reddish..Sp. 33. 
1st and 4th segments yellow, 2d and 3rd reddish.Sp. 34. 
1st and 2d segments yellow, 3rd and 4th reddish...Sp. 35. 
§§§ Abdomen entirely yellowish or reddish, or both. 
Anterior half yellow, posterior reddish...Sp. 36. 
2d and 3rd segments reddish.Sp. 37. 
3d and 4th .Sp. 38. 
All yellowish except anus.Sp. 39. 
*** Thorax above black. 
Abdomen with the first 3 segments more or less yellow or red Sp. 40—42. 
‘‘ reddish, except the 1st and last segments.Sp. 43. 
‘‘ all black.Sp. 44. 
1. B. Virginicus. 
Apis Virginicus Oliv. Encycl. Meth. Ins. iv, p. 66. (1789). 
? Apis griseo-collis De Geer, Mem. Ins. iii, p. 576, pi. 28, fig. 13—14. (1773); 
Oliv. Encycl. Meth. Ins. iv, p. 64. (1789). 
Bombus Virginicus Fabr. Syst. Piez. p. 346. (1804); St. Farg. Hym. i, p. 470. 
(1836); Kirby, Faun, Bor. Am. iv, p. 274. (1837); Smith, Brit. Mus. Cat. 
Hym. ii, p. 398. (1854); Greene, Ann. Lyc. Hat. Hist. H. Y. vii, p. 170. 
(1860). 
Female. Head black, clothed more or less with yellowish hairs 
above the antennae. Thorax above and on the“sides pale yellow, more 
sparse on the disk. Wings vary from sub-hyaline to violaceous. Legs 
black, except the base of the femora beneath which is sometimes 
clothed with yellowish hairs ] tarsi brown, basal joint rufous on the 
inner side. Abdomen with the first segment above pale yellow, re¬ 
maining segments black; sometimes the anterior margin of the second 
segment in the middle, is sparsely clothed with short yellowish hairs. 
Beneath black. Length 9—12 lines. 
Worker. Difiers from the female only in size, and undergoes the 
same variations in color. Length 5—7 lines, 
Male. Head clothed above and below the antennae with yellowish, 
intermixed with a few black hairs; eyes very large and prominent. 
