HENRY J. FRANKLIN. 407 



it has been so long in use for the species just described, I 

 have decided to retain it for this species, though it is my 

 opinion that De Geer's figure was really made from a speci- 

 men of auricomus Robertson. The queen of auricomus some- 

 times very closely approaches the size of De Geer's figure, 

 while those of fervidus and a?nericano7'um never do so. 



Bonibiis (Bombus) sonorus Say. 

 Bombus sonorus Say, Boston Journ. Nat. Hist., I, P. 4, 1837, p. 413, 

 n. 1, 9. 

 Le Conte, Ed. of Writ, of Th. Say. Ent., II, 1859, p. 



787, n. 1. 

 Greene, Ann. Lye. Nat. Hist. N. Y., VII, 1860, p. 171, 

 n. 6, 9. 

 " " Cresson, Proc. Ent. Soc. Phila., II, 1863, p. 95, n. 12. 



Cresson, Trans. Amer. Ent. Soc., VII, 1879, p. 230. 

 (Catal.). 

 " pennsylvanicus Ant. Handlirsch, Ann. Naturh. Hofmus. 



Wien., Ill, 1888, p. 238 (pars.). 

 " " var. sonorus Dalla Torre, Cat. Hym., X, p. 



539, 1896. 

 " sonorus Cockerell, Cat. Abej. de Mex., p. 19. (Catal.). 

 " " Cockerell and Porter, Ann. and Magaz. Nat. Hist., 



Ser. 7, Vol. IV, 1899, p. 388. 

 " Titus, Can. Ent., XXXIII, 1902, pp. 38 and 44. 

 " Cockerell, Bull. So. Cal. Acad. Sci., Ill, June, 1904, 

 p. 89. 

 Cockerell, Trans. Amer. Ent. Soc, XXXII, Nov., 1906, 

 p. 313. 

 " Davidson, Bull. So. Cal. Acad. Sci., X, 1911, p. 66. 



Type. — From Mexico ; lost. 



Pile of medium length and rather coarse in texture. Head black. 

 Dorsum of thorax yellow, with or without a black interalar band ; 

 pleura black. Dorsum of abdomen of the females with the first three 

 segments yellow and the last three black ; of the males, with the first 

 four segments yellow and the rest black. Venter black. Legs black, 

 except sometimes those of the male. Wings dark, especially those of the 

 queen. 



Queen. Head. — Rather elongate ; black. Labrum with tubercle-like 

 areas widely separated, their margins rounded and summits coarsely 

 punctate, the surface between them and above the shelf-like projec- 

 tion deeply excavated ; shelf-like projection very wide and prominent ; 

 translucent areas faint or absent. Malar space about as long as its 



TRANS. AM. ENT. SOC, XXXVIII. 



