I 



ART. 5 GENERIC REVISION OF THE FOSSORIAL WASPS — PARKER 45 



being even greater in this species than in pictifrons. The male, how- 

 ever, is readily distinguished by the unique character of the process 

 on the second sternite, which is well developed, its ventral surface 

 being unusually broad and its posterior end terminating in two 

 points. The female may be distinguished from pictifrons^ with 

 which species it is most likely to be confused, by the wholly yellow 

 second sternite, the broken U-shaped discal mark on the scutum, and 

 especially by the presence of more or less black on the base of the 

 clypeus. 



SPECIMENS EXAMINED 



Mexico: Augelus Bay, Gulf of California (June 26, 1921, E. P. Van Duzee) ; 

 Guaymas (April 7, 1921, E. P. Van Duzee). 



Fox has described a variety of this species under the name of 

 albicera, which differs from the species chiefly in having the fascia 

 on the tergites more broken into discal and lateral spots and in having 

 these discal spots white instead of yellow. With i-espect to struc- 

 tural characters, I have been unable to find any essential difference 

 between the variety and the species. 



STICTIELLA EXIGUA (Fox) 



Monedula exigua Fox, Proc. Acad. Nat. Sci. Phila., 1895, p. 370. 

 StictieUa exigua PARKEat. Proc. U. S. Nat. Mus., vol. 52, 1917, p. 50. 



This species is not represented in the collection in the United States 

 National Museum. It has been reported from Arizona and Montana, 

 and by C. L. Fox from various points on the Gulf of California. 



STICTIELLA PULLA (Handlirsch) 



Monedula puUa Handlirsch, Sitz. Akad. Wissensch. Wien, Math.-Nat. CI., vol. 



99, 1890, p. 149.— Dalla Torre, Cat. Hym., vol. 8, 1897, p. 499. 

 Monedula usitata Fox, Proc. Acad. Nat. Sci. Phila., 1895, p. 371. 

 i>tictiella puJla Parker. Proc. U. S. Nat. Mus., vol. 52, 1917, p. 52. 



Handlirsch based his description of this species on the female. A 

 careful study of Fox's description of his usitata convinced me that 

 the male he referred to usitata is the male of Handlirsch's pulla. 

 The considerations that led to this conviction are set forth in my 

 previous paper. 



SPECIMENS EXAMINED 



California: Los Angeles County (Coquillett) ; San Diego County (Coquillett) ; 



San Gabriel (C. E. Hutchinson). 

 Washington. 



STICTIELLA ARGENTATA C. L. Fox 



fitietiella argentata C. L. Fox, Proc. Cal. Acad. Sci., vol. 12, 1923, p. 434. 



This species is closely related to StictieUa pulla Handlirsch, from 

 which the male of this species may be distinguished by the absence 



