266 HYMENOPTERA. 



Many of the examples of this species have the wings hyaline 

 or subhyaline ; this is the case in all from Brazil and in others 

 from California ; examples from Jamaica have them fuscous ; 

 beyond the difference in the colouring of the wings no specific 

 distinction has been detected. 



2. Priononyx atrata. B.M. 



Sphex atrata, St. Farg. Hym. ili. 355. 30. 



Hab. North America. 



St. Fargeau described this species from a specimen in Serville's 

 Collection, its locality being unknow-n : it is the Sphex labrosa of 

 Harris's Catalogue. 



3. Priononyx Doumerci. 



Sphex Doumerci, St. Farg. Hym. iii. 357. 33. 

 Hab. Cayenne ; Brazil. 



4. Priononyx striata. * B.M. 



Female. Length 10-11 lines. — Black : the face covered with 

 silvery jiile, and having, as well as the cheeks, a number of long 

 white hairs ; tlie anterior margin of the clypeus with a small 

 notch in the middle. The mesothorax longitudinally linelv stri- 

 gose, the metathorax transversel}' so, and covered thinly with 

 short cinereous pubescence ; the scutellura bituberculate ; the 

 tibisB and tarsi strongly sj^inose ; the anterior tarsi with long cilia 

 outside ; the wings black, with a violet iridescence, their apical 

 margins palest. Abdomen ferruginous, with the petiole black. 



The male only differs in being smaller. 



Hah. Brazil (Para; Villa Nova). (Coll. H. W. Bates.) 



This is probably the Pepsis Johannis of Fabricius, and also the 

 Sphex Doumerci of St. Fargeau ; the former, however, does not 

 notice the striation of the thorax, but points out the emargina- 

 tion of the scutellum, which is described here as bituberculate : 

 St. Fargeau does not notice the form of the scutellum, but de- 

 scribes tiie metathorax as being transversely striated ; the meso- 

 thorax he does not mention. Under these circumstances we 

 have given another name and description to the species. 



5. Priononyx ^Egyptia. 



Sphex iEgyptia, St. Farg. Hym. iii. 356. 32. 

 Hab. Egypt. 



