SCIENTIFIC EXPEDITION TO NORTHWESTERN COLORADO 1 29 



Osmia mandibularis Cresson; variety like that known from Rociada, New 

 Mexico. Newcastle, August 3, at flowers of Carduus (R.). 



Perdita albipennis Cresson. Rifle Gap, August 4, male at flowers of Helianthus 



(R.). 



Halictus armaticeps Cresson. Rifle Gap, August 4, at flowers of Helianthus (R.). 



HYMENOPTERA VESPOIDEA AND SPHECOIDEA (Wasps) 



These have all been determined by Mr. S. A. Rohwer. 



Vespa maculata L. Buford, August 21 (H.), and 23 (D.). 



V. arenaria Fabr. Buford, August 22 (H.). 



V. communis Sauss. Seven miles below Marvine Lake, Rio Blanco Co., August 

 26 (H.), Marvine Lodge, August 28 (D.). 



Polistes sp. Newcastle, August 2 (R.). Mr. Rohwer says that this is identical 

 with a form which he collected at Rifle, Colorado, and is perhaps a variety of P. 

 variatus Cresson. More material is needed to determine its exact status. 



Eumenes coloradensis Cresson. "A variety with a small lateral spot on the side 

 of the first abdominal segment" (Rohwer). Meeker, August 9 (R.). 



Chlorion (Proterosphex) ichneumoneum (L.). Newcastle, August 2 (R.). 

 "The abdomen is a little blacker than in Boulder specimens" (Rohwer). 



Sphex luctuosus (Smith). Newcastle, August 2 (R.). Meeker, August 9 (R.). 



Crabro dilectus Cresson. Meeker, August 9 (R.). 



Ephuta fulvohirta Cresson. Newcastle, August 9 (R.); between Newcastle and 

 Rifle Gap, August 3 (R.). 



COLEOPTERA 



These have all been kindly determined by Mr. H. C. Fall. They were collected 

 by Mr. Robbins. 



Carabid^e 



Carabus taedatus Fabricius. Buford, August 20. 



Pterostichus protractus Lee. Buford, August 20; Fitzgerald's Ranch, Septem- 

 ber 1. 



Pterostichus longulus Lee. Buford, August 20. 



Amara polita Lee. Buford, August 20. 



Harpalus ellipsis Lee. Buford, August 20. 



Harpalus oblitus Lee. Fitzgerald's Ranch, September 1. 



Haliplid^e 

 Haliplus ruficollis DeGeer. Near Buford, August 20. 



Dytiscid^e 

 Bidessus affinis Say. Near Buford, August 20. 

 Coelambus patruelis Leconte ? Near Buford, August 20. 



