July, '07] ENTOMOLOGICAL NEWS. 295 



3. Bombias auricomus Robertson. (= pennsylvanicus Cresson, <f\ ?, 



, in part.) 



Probably the entire State, but rare westwardly, and not yet 

 taken in Sioux County. Many specimens from Lincoln, Omaha, 

 South Bend, West Point, etc., and a single worker from 

 Dundy County in June on Car duns (M. H Swenk). Next 

 to scparatus this is our most common Bombias. The females 

 begin to fly in early May and from then to early October, 

 visiting the flowers of Ribcs, Astragalus, Fragara, Rubus, 

 Antirrhinum and Cardmis. 



4. Bombias nevadensis (Cresson). 



This is essentially a species of the Transition zone, but it 

 straggles south along the western edge of the State to Dundy 

 County, and east along the northern edge to West Point. It 

 abounds in Sioux County, flying from May to September, 

 visiting commonly the flowers of Astragalus, Malvastrum, 

 Clcomc, Monarda, etc. Cresson's Bombus improbus is un- 

 doubtedly the male of nevadensis. 



5. Bombias morrisoni (Cresson). 



A strictly Transition species, only rarely descending even 

 to the more elevated portions of this State. We have two 

 worker specimens, one taken in Warbonnet Canon, Sioux 

 County, July 21, the other at Gering, Nebraska, in August. 



6. Bombias rafocinctus (Cresson). 



Sioux County (Glen, Harrison, Pine Ridge), July and 

 August, 3 females, 1 1 workers and i male. Also a single male 

 from West Point, Nebraska. 



7. Bombias edwardsii (Cresson). 



A worker bumblebee captured in Warbonnet Canon, Sioux 

 County, July 23, 1901 on Verbena (M. A. Carriker), is ap- 

 parently a variety referable to this species, though not typical 



of it. 



Genus BOMBUS Latreille. 



i. Bombus proximus coloradensis Titus. 



Warbonnet Canon, Sioux County, July i, 1901 (L. Bruner), 

 one female specimen. 



