July, '07] ENTOMOLOGICAL NEWS. 297 



7. Bombus huntii Greene ( = ternarius of authors, in part.) 



This handsome species is confined to the Pine Ridge country 

 in Sioux County, where it flies abundantly from late May to 

 September, visiting Astragalus, Symphoricarpos, Campanula, 

 Borago, Mclilotus, Monarda, Clcoinc, Cardmis and Helianthus. 



8. Bombus juxtus Cresson. 



Distributed as B. huntii, but much less common, having the 

 same season and visiting the same plants. 



Genus PSITHYRUS Lepelletier. 



1. Psithyrus variabilis (Cresson). 



Our commonest Psithyrus. Lincoln, Ashland, Seward and 

 West Point, May to October, found on Riibus, Verbena, 

 Liatris, Bidcns, Solidago and Carduus. 



2. Psithyrus laboriosus (Fabricius). 



Two specimens, a female from Lincoln taken in August, 

 1893, and a male from West Point taken September 19, 1887. 

 This species is much closer to P. latitarsus Morrill than is P. 

 insularis, with which he compares it. 



3- Psithyrus insularis (F. Smith). 



Found only in Sioux County, from which we have a female 

 and two male specimens. 



Family MELECTIDAE. 



Genus NEOLARRA Ashmead. 

 i. Neolarra verbesinae Cockerell. 



One 9 specimen, Warbonnet Canon, Sioux County, Neb- 

 raska, July 23, 1901, on Helianthus (M. Cary). 



Genus NEOPASITES Ashmead. 

 i. Neopasites illinoiensis Robertson. 



Lincoln, West Point, Cedar Bluffs and Omaha, Nebraska, 

 June 20 to September n, on Solidago rigida and Grindelia 

 squarrosa in the fall, and on Ratibida colnuinaris, Symphori- 

 carpos occidcntalis and Asclcpias sp. in the summer. This 

 species has been found in the nests of Calliopsis andreniformis 

 at both Omaha and West Point. 



