HENRY J. FRANKLIN. 415 



almost entirely black as in the queen and worker ; segments two and 

 three yellow ; segment four usually entirely black, but rarely partly 

 covered with yellow pile ; segments five, six and seven black. Venter 

 mostly dark. 



Genitalia. — Outer spatha (fig. 124) exceptionally long for its width ; 

 with anterior lateral projections broad and rounded at the end ; the 

 posterior margin very deeply incurved in the middle so as to make the 

 apex strongly bilobate, the ventral surface of each lobe with somewhat 

 scattered, rather short, brown hairs. Inner spatha (fig. 136) much 

 like that of nevadensis. Claspers (fig. 83) and sagittae as already de- 

 scribed for the group ; much like those of nevadensis , but the inner 

 lobe of the squama broader and the outer lobe longer and more pointed 

 at the apex than in that species. 



Wings. — Lighter than those of the females, but very deeply stained 

 with brown ; unusually dark for wings of a bumble-bee male. 



Legs. — Mostly dark, but the coxae, trochanters and femora often 

 with some light tinges and the hind fringes of the posterior tibiae and 

 middle and posterior metatarsi very often more or less whitish ferru- 

 ginous ; the middle tibiae often with touches of light pile on their hind 

 sides toward their distal ends. Posterior metatarsi about two and one- 

 half times as long as their greatest width. 



Dimensions. — Length : queen, 18 mm. to 22 mm. ; worker, 14 mm. 

 to 18 mm. ; male, 16 mm. to 19 mm. Spread of wings: queen, 43 

 mm. to 47^ mm. ; worker, 33 mm. to 42 mm. ; male, 38 mm. to 42 mm. 

 Width of abdomen at second segment : queen, 10 mm. to \\\ mm. ; 

 worker, 6^ mm. to 10 mm. ; male, 8 mm. to 9 mm. 



Redescribed from many queens and workers and six males. 

 Habitat. — The writer has records of this species as follows : 

 Canada (probably southern Ontario), New York, Massa- 

 chusetts (rather rare at Amherst), Connecticut, Pennsyl- 

 vania, Maryland, New Jersey, Delaware, Virginia, North 

 Carolina, Tennessee, Kentucky, Ohio, Indiana, Illinois, 

 Michigan, Wisconsin, Minnesota (St. Paul), Missouri, Iowa, 

 Texas (Greenville), Kansas, Nebraska, Colorado (Virginia 

 Dale) and New Mexico (Magdalena Mountains — cf. H. L. 

 Viereck in Trans. Amer. Ent. Soc, XXXII, 1906, p. 240). 

 Extensive collecting will probably extend this habitat con- 

 siderably. What are the northern and southern limits of the 

 species ? This seems to be mainly an Upper Austral form, 

 but it runs over considerably into the Transition Zone on 

 one side and the Lower Austral on the other. 



TRANS. AM. ENT. SOC, XXXVIII. 



