130 HYMENOPTERA. 



PROSOPIS ZIZI^: Rob. 1896. 



1896. P. affinis,Roh. Can. Ent. 28:136. 



1896. P. zizice, Rob. Can. Ent. 28 : 136. 



18QS. P. zizics, CkW. Ent. 31:187. 



imS. P. ztzice, race dtmningi, {maXe), C\d\. Ent. 31:188. 



1901. P. a^«z5, Lov. Ent. News. 12:6. 



1201. P. ziz ice, 'Low. Eut. News. 12:162. 



1904. Z' ^/^z>, Rob. Can. Ent. 36:274. 



\9Q2. P zizicP^'Lo'v. Ent. News. 20:414. 



1910. Z'. 2?>z>, Lov. Psyche. 17:181. 



Male. — Resembles male of P. modestus in size and form, may be dis- 

 tinguished by the long, heavy upper processes of the lateral face marks, 

 the slender, curved scape, usually with a yellow stripe, and by the dif- 

 ferent genitalia. 



Scape swollen, rather slender, concave laterad and caudad ; clypeus 

 rather long, narrower at base than lateral areas at same level. 



Sculpture. — Not appreciably different from that of P. modestus. 



Yellow Markings . — Lateral face marks heavy, falling lateral areas and 

 extending one-half the length of scape along eye margin, not narrow- 

 ing but rather broadening to rounded or truncate apex ; supraclypeal 

 mark rather long, portion below antennal sockets quadrate ; scape 

 usually with yellow stripe in front ; labrum and mandibles usually with 

 yellow, (fig. 101). Collar, tubercles, sometimes tegulas and wing bases 

 with yellow. Legs marked as in modestus. 



Genitalia. — Similar to those of P. modestus, except the seventh ven- 

 tral plate, which has broad, somewhat triangular, but rounded wings, 

 without distinct lobes, and largely covered with long hairs, but with- 

 out the basal tuft found in related species, (figs. 11, 26, 29). 



Female. — Only typical specimens are distinguishable from the same 

 sex of P. m.odestus, and these only by the larger lateral face marks, 

 which almost fill the lateral areas and extend some distance along the 

 eye margin as shown in figure (No. 138); and by the yellow on tegulaj 

 and wing bases. 



P. zizise var. dunningi (Ckll.). 



This form was described as P. zizice race d7i?im'n^i, by 

 Cockerell, from South Dakota specimens, but has since been 

 separated as a species. Professor Cockerell's first determina- 

 tion, however, is undoubtedly the correct one. I have speci- 

 mens from Colorado and Nebraska, the latter determined by 

 Swenk, who has for some time worked in conjunction with 

 Professor Cockerell, and they are unquestionably zizia. 

 The characters distinguishing it from the typical form are : 



