N0.1J8T. NORTH AMERICAN DIGGER WASPS— FERNA LI). 331 



Claws with from two to six teeth near the base of their inner bor- 

 der. Median segment without a stig-matal groove. Stigma of the 

 first dorsal al)dominal plate behind its middle. Inner margins of the 

 eyes parallel in the female; more or less convergent in the male. 

 Clypeus somewhat rounded anteriorly, usually with a median depres- 

 sion or notch. Second cubital cell higher than broad. Tarsal comb 

 present in the female. Comb teeth of the hind tibial spine spaced, 

 tooth-like. Last ventral abdominal plate of the female arched but 

 without a median longitudinal ridge. Ventral abdominal plates of the 

 male flat; those of the fourth and fifth segments silky sericeous. 

 Abdomen rising sharply behind the petiole and to a considerable 

 height, particularly in the female. First and second segments of the 

 filament of the antenna short in the male, together not much longer 

 than the first segment in the female. (Plate IX, figs. 15. 1*3; Plate X, 

 fig. 21.) 



The genera Prlononyx, Harpdctopus:^ and Gasfrosj^haeria appear to 

 have been established by their authors mainly on the number of teeth 

 present on the tarsal claws. This character is too restricted, however, 

 as many forms which are widely separate would be brought into near 

 relationship if this were the only criterion, while nearly related 

 species as shown by a comparison of all their characters, but which 

 differ in the. number of claw teeth, would be widel}'^ separated. Kohl 

 has already called attention to the unnaturalness of these groups and 

 lias united them, giving practically the description above. He has 

 selected the name Uarpactopus for the group, but as Priononyx was 

 used nearl}" ten years earlier I prefer that name, for in either case the 

 name does not carry its original significance, the group having been 

 redefined and its limits changed. 



CHLORION (PRIONONYX) FERRUGINEUM (Fox). 



Splte.v {Priononyx) fcrruffiiieus Fox, female, Ent. News, III, 1892, p. 170. 



Type. — One female from So. Cal. (so the label on it states) now 

 in the National Museum in Washington. (Type, Cat. No. 1867, 

 U.S.N. M.) 



Male cotypes (now first described): Five males; two taken at Con- 

 gress Junction, Arizona, July, by F. H. Snow, and now in his posses- 

 sion; one taken at Albuquerque, New Mexico, and in the collection of 

 Dr. W, H. Ashmead; one from Los Angeles County, California (" coll. 

 Coquillett "), in the United vStates National Museum; and one from 

 Ruicon, New Mexico, taken July 5, now in the collection of the Mas- 

 sachusetts Agricultural College in Amherst, Massachusetts. 



The following description was prepared from the female type: 



Slender; head large; body in general pale ferruginous, Avith consid- 

 erable dull white to yellowish, long pubescence and hairs: wings 

 hyaline. 



