AMERICAN HYMENOPTERA. 323 



1886. Aulacus abbottii Schletterer, Ann. d. k. k. Nath. Hofm. Wien., iv, p. 539. 

 1901. Pristaulacm occidentalis Ashniead, Ent. News, xii, p. 278. 



9.— Black or ferruginous; face and vertex black, punctate; mandibles and 

 edge of labruin ferruginous; antennae black, 10-11.5 ram. long; scape ferrugin- 

 ous beneath ; medial mesothoracic lobe strongly gibbous, emarginate, transverse 

 rugose; body but sparingly pubescent; wings stained yellowish, and showing a 

 brilliant violaceous reflecti(m ; a fuscous spot beneath the stigma and at the apex 

 of anterior wings; legs ferruginous, tarsi paler, coxse and trochanters black; 

 petiole distinct, ferruginous, with a narrow black stripe above and below ; abdo- 

 men robust, ferruginous, terminal segments dusky or black. Length of abdomen 

 5-7 mm. Ovipositor 13-15 mm. Body 11-15 mm. 



% .— Diflfers from the female only in being slightly more pubescent, wings less 

 fuscous, but showing the same brilliant violaceous reflection, the abdomen ringed 

 with black on several segments, the coxae, trochanters, face and entire scape more 

 or less ferruginous. 



Habitat. — ;Colorado, Nevada, Washington. 



Types in collection American Entomological Society. 



Described by Cresson from 15 females. Besides these the author 

 has examined 11 females and 4 males from Washington. The male 

 is here described for the first time. The violaceous reflection is 

 characteristic, but the color varies, through all stages from black to 

 ferruginous. The flagellum is always dark. 



Prii^tanlacus melleus Cresson. 

 1879. Aulacus melleus Cresson, 9 , Trans. Am. Ent. Soc, vii, p. 255. 

 1879. Aulacus consors Cresson, % , Trans. Am. Ent. Soc, vii, p. 255. 

 1901. Pristaulacas consors Ashmead, Ent. News, xii, p. 278. 

 1901. Prisfaulacus melleus Ashmead, Ent. News, xii, p. 278. 



9. Pale ferruginous, face rough, vertex smooth; mandibles tipped with 



black; antennaj black, 17 ram. long; scape ferruginous; medial mesothoracic 

 lobe gibbous, br.oadly emarginate, strongly rugose; wings stained slightly yellow- 

 ish, a quadrate fuscous spot beneath the stigma, extending to the subdiscoidal 

 nervure. A fuscous spot at apex of anterior wings, and the basal half of the me- 

 dian cell fuscous; wings showing slight violaceous reflection; legs ferruginous, 

 trochanters ringed above with black ; abdomen ferruginous, with an unusually 

 long petiole, length abdomen 8-9 mm. ; ovipositor 21 mm. Length 16 mm. 



% . — Black ; vertex smooth ; face roughened ; anteunte black, 10-12 mm. long: 

 scape ferruginous beneath ; medial me.sothoracic lobe gibbous, emarginate, ru- 

 gose ; wings stained yellowish, showing but slight violaceous reflection ; legs fer- 

 ruginous, trochanters ringed above with black ; abdomen ferruginous, banded, 

 with black. Length 13-15 mm. 



Habitat. — Nevada. 



Cresson described the species from 2 females and 4 males, the 

 indications are that it varies as much in color as does occidentalis, to 

 which it is very closely related. 



Types in the collection of the American Entomological Society. 



TRANS. AM. ENT. SOC, XXVII. NOV., 1901. 



