342 T. D. A. COOKKRELL. 



POMPILID^. 



412. Agenia congrua Cr., uear Swift Creek. 



413. Pompilus biguttatus St. Faig. 



414. " scelestus Cr., near Swift Creek. 



415. Priocnemis sp., near Swift Creek. 



All three genera are also European. Pompilus is extremely rich in spe- 

 cies, and widely distributed ; eleven species occur in Colorado, both 

 of those given above are boreal. Priocnemis has six Colorado species. 

 Agenia congrua, the only Colorado species of its genus, is down in 

 Cresson's catalogue only for W. Va., but possibly it will prove to be 

 really boreal. 



VESPID^. 



416. Vespa g-ermanica Fb., near Swift Creek. 



417. " maculata Fb.. Willow Creek, Cusack Ranch, August. Extends to 



Labrador (Packard). 



418. Vespa occidentalis Cr., uear Swift Creek. 



419. " diabolica Sauss., Cusack Ranch, Aug. 3. 



420. " infernalis Cr., near Swift Creek. 



421. Polybia sp. incert. Specimen with Dr. Riley. 



The wasps are very similar to those of Europe, and V. germanica is spe- 

 cifically identical. V. maculata, diaboHcn and infernalis may be con- 

 sidered boreal, while V. occidentalis is western. For this last species 

 Cresson cites Nevada and New Mexico, while Mr. Fox informs me 

 that he has seen specimens from Washington and Vancouver Island. 

 PoUstes occurs immediately below tlie mid-alpine region, and I believe 

 extends into it. but I have no records. 



EUMENID-^. 



422. Eumenes fraternus Say, near Swift Creek. 



423. Odynerus walshianus Sauss., near Swift Creek. 



424. " debilis Sauss., near Swift Creek. 



425. " sulfureus Sauss., near Swift Creek. 



426. " capra Sauss., near Swift Creek. 



427. " tlgris Sauss., near Swift Creek. 



428. '■ albophaleratus Sauss., near Swift Creek. 



Both the genera are also European, and all the species are boreal, except 

 0, walshianus, known elsewhere only in Illinois; and 0. sulfureus, 

 which also occurs in California. Thinking that 0. walshianus must 

 surely have been found in some intermediate locality during recent 

 years, I questioned Mr. Fox, and he assures me that this is not the case. 



MUTILLID^. 



429. Photopsis alcanor Blake, near Swift Creek. 



430. " glabrella Cr., near Swift Creek, etc., common. Also sub-alpine. 



431. " atrata Blake, Willow Creek, Aug. 27, and near West Cliff. 



432. Sphserophthalma mollissima Blake, Ula, July 30. 



433. " creusa Cr., West Cliff, July 27. 



434. " fulvohirta Cr., near Swift Creek. 



