HENRY J. FRANKLIN. 421 



Males. — Vertex above ocelli at most but very little nar- 

 rower than space between eyes at ocelli {fraternus itself 

 comes nearest to being an exception to this); flagellum of an- 

 tennae at least two and one-half times as long as the scape ; 

 third antennal segment at most not much longer than the fifth ; 

 the size of the eyes varying greatly between the different 

 species ; posterior tibiae with outer face convex with at least 

 a portion, especially toward the distal end, bare ; posterior 

 metatarsi more than three times as long as their greatest 

 width (except in the case of rufocinctus) , with long hind 

 fringes. 



Genitalia.— Bxs,nch.e°, of claspers (figs. 84, 85, 86, 87 and 

 88) long and rounded at apical end as seen from dorsal side ; 

 volsellse variable, but narrowing toward the tip beyond ends 

 of branches ; squamae usually comparatively short and chunky, 

 the inner lobe well developed, being much larger, in com- 

 parison with the outer one, than in the Auricomus group ; 

 heads of sagittae thin and more or less foliaceous, recurved 

 ventrad and mesad, and often quite distinctly sickle-shaped, 

 thus paralleling the Pratorum group of the subgenus Bom- 

 bus ; shafts of sagittae usually bent outward slightly in the 

 middle. 



Boiiil>us (Bombias) fraternus (F. Sm.). 



Apathus fraternus Smith, Cat. Hym. Brit. Mus., II, 1854, p. 385, n. 



6, c?. 

 Bombus scutellaris Cresson, Proc. Ent. Soc. Phila., II, 1863, p. 96, n. 



15, 9 S d^. 

 Apathus fraternus Cresson, Proc. Ent. Soc. Phila., II, 1863, p. Ill, 



n. 3. 

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



230. (Catal.). 

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



(Catal.). 

 Apathus fratermcs Cresson, Syn. Hym. No. Amer., 1887, pp. 307 and 



308. (Catal.). 

 Bombus scutellaris Ant. Handlirsch, Ann. Naturh. Hofmus. Wien., 

 Ill, 1888, p. 237. 

 Dalla Torre, Cat. Hym., X, 1896, p. 546. (Catal.). 

 Psithyrus fraterftus Dalla Torre, Cat. Hym., X, 1896, p. 569. (Catal.). 



TRANS. AM. ENT. SOC, XXXVIII. 



