July, '07] ENTOMOLOGICAL NEWS. 295 



3. Bombias anricomui Robertson. (= pennsylvanicus Cresson, J 1 , 9, 

 g , 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 Carduus (M. H Swenk). Next 

 to separatus this is our most common Bombias. The females 

 beg-in to fly in early May and from then to early October, 

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

 Antirrhinum and Carduus. 



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, 

 Clcome, 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 rniocinctns (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. Bombns proximus coloradensis Titus. 



Warbonnet Canon, Sioux County, July 1, 1901 (L. Bruner), 

 one female specimen. 



