HENRY J. FRANKLIN. 335 



Bombus lacustris Cresson, Trans. Amer. Ent. Soc, VII, 1879, p. 231. 

 (Catal.) 

 Cresson, Syn. Hym. No. Amer., 1887, p. 308. 

 melanopyge Cresson, Syn. Hym. No. Amer., 1887, p. 308. 

 tnelampygiis Ant. Handlirsch, Ann. naturh. Hofmus. Wien., 



Ill, 1888, p. 231. 

 lacustris Provancher, Addit. faun. Canada. Hymen., 1888, p. 



340?, n. 9, 9 "^ 6" . 

 ternarius var. lacustris Dalla Torre, Cat. Hym., X, p. 533, 



1896 (pars.). 

 sylvicola Titus, Can. Ent., XXXIV, 1902, pp. 39 and 43. 

 melanopygus Viereck, Can. Ent., XXXVI, April, 1904, pp. 98 

 and 99. 

 " H. Friese, Ann. du Mus. Zool. de I'Acad. Imp. 



des Sci. de St. Petersb.,' 1904, Tome IX, n. 4. 

 Viereck, Trans. Amer. Ent. Soc, XXXII, July, 

 1906, p. 242. 

 " Fletcher and Gibson, Can. Ent. Rec. (Ann. Rep't 



Ent. Soc. Ont.), 1907, p. 17. 



Types. — Possibly in existence, but I am ignorant of their 

 whereabouts. 



Pile moderately long and fine ; that on face, occiput and dorsum of 

 thorax back to the scutellutn of thoroughly mixed black a?id yellow hairs, 

 producing a clouded effect ; pleura and scutellmn yellow ; first segment 

 of abdom.e7i yellow, second and third deep ferruginous-red, fourth black 

 and yellow, fifth and sixth black Malar space medium. 



Queen. Head. — Broadly rounded trapeziform. Face and occiput 

 with yellow and black pile mixed, sometimes one and sometimes the 

 other predominant. Tubercle-like areas of labrum rather deeply con- 

 caved at summits, their hind (upper) borders usually broadly rounded 

 over ; shelf-like projection small and narrow, the space above it and 

 between the tubercle-like areas deeply excavated. Malar space nearly 

 as wide at apex as long, about one-quarter as long as the eye ; clypeus 

 coarsely punctate ; fiagellum of antenna about one and four-fifths 

 times as long as scape ; third antennal segment much longer than 

 fifth, the fifth somewhat longer than the fourth. 



Thorax. — Anterior part of dorsum back to scutellum heavily clouded 

 with black and yellow pile mixed, the black being most predominant 

 in a very indistinct and indefinite band between the bases of the wings 

 and in a very small spot in front of each tegula ; scutellum with pure 

 yellow pile, sometimes with a few black hairs admixed. Mesopleura 

 with yellow pile covering them to bases of legs ; metapleura with yel- 

 low pile ; sides of median segment sometimes with yellow, sometimes 

 with dark pile. Disc naked and smooth. 



TRANS. AM. ENT. SOC, XXXVIII. 



