NO. 2202. GIFFARD COLLECTION OF HYMENOPTERA—ROHWER. 239 



the apical margin arcuately emarginate; scutellum, piopodeum, and 

 mesepisternum black; tergites with only the apical margin pnle; 

 tegulae almost entirely brownish. Length to apex of second tergite, 

 10 mm. 



Type-locality. — Tahoe, Eldorado County, California. Described 

 from one male collected at an altitude of 0,200 feet by W. M. Giffard. 



Type.— Cat. No. 20335, U.S.N.M. 



PTEROCHILUS MORRISONI Cresson. 



One male from Tahoe, Eldorado County, collected June, 1909, at 

 an altitude of G,200 feet. 



Superfamily MUTILLOIDEA. 



Tlie superfamily Mutilloidea as used here is that portion of the 

 Fossores of Cresson in which the pronotum is large, well developed 

 laterally, and extends back at least as far as the anterior margin of 

 the tegulae and does not form a tubercule. The group is easily sepa- 

 rated from the true Vespoids by the character mentioned under that 

 superfamily. In the writers opinion, the superfamily Vespoidea as 

 defined by Ashmead is composed of a number of homogeneous 

 groups, which it will be desirable to call superfamilies. The name 

 Mutilloidea is used in preference to Scolioidea, which was intro- 

 duced by Banks in 1912, because Mutilla is the older genus. 



Family MUTILLIDAE. 



DASYMUTILLA AUREOLA (Blake). 



A single female collected by Blaisdell, July, 1910, in Calaveras 

 County, California. 



Family PSAMMOCHARIDAE. 



PSEUDAGENIA METALLICA Banks. 



A female from Alameda County, California, July, 1907. 



PEPSIS FORMOSA (Say). 



Two of each sex collected by Blaisdell in Calaveras County, Cali- 

 fornia, July, 1910. 



PSAMMOCHARES, species. 



A single female from San Francisco, California, July, 1907, does 

 not seem to be described. 



PSAMMOCHARES AETHIOPS (Cresson). 



A male from Alameda County, California, July, 1907. 



PSAMMOCHARES LUCTUOSUS (Cresson). 



One female and two males from Tahoe, Eldorado County, Cali- 

 fornia, June, 1909. 



