AMERICAN HYMENOPTERA. 325 



new genus for those having tliree teeth, and let Pristaulacus remain 

 for those having four, as Kieffer's illustration * shows. See Plate 

 XI, Figs. 7, 8 and 9. 



Mesothorax deeply emarginate. Legs black firmus Cresson. 



Mesothorax very slightly emarginate. 



Length 13.5 mm. Legs black. Apparently but 2 teeth on tarsal claws. 



subfirmii!« Viereck, nov. spec. 



Length 16 ram. Legs fulvous, femora red resutorivoi'us Westwood. 



Length 14.5 mm. Feet rufous, femora fuscous abbottii Westwood. 



Length 10 mm. Feet yellow, femora fuscous stigiiiateru!« Cresson. 



Oleisoprister firinus Cresson. 

 1879. Aulacus firmus Cresson, 9 , Trans. Am. Ent. See, vii, p. 256. 

 1901. Prisiaidacus firmus Ashmead, Ent. News, xii, p. 278. 



9. — Black; covered with fine white pubescence; vertex smooth, face punctu- 

 late; antennae black ; medial thoracic lobe not gibbous, emarginate; wings hya- 

 line, a fuscous spot beneath the stigma and on the transverse medial nervure and 

 at the apex of the front wings, which are witliout violaceous reflection ; legs 

 black, tibiae castaneous; abdomen ferruginous, with black markings above, 6.5 

 mm. long; ovipositor 17 mm. long. Length 14 mm. 



Habitat. — Colorado, one specimen. 



Type in the collection of the American Entomological Society. 



See Plate XI, Fig. 8. 



Oleisoprister subfiriuiis Viereck, nov. spec. 

 " 9 • — Mandibles roughened at base, teeth and edges smooth ; the rest of the 

 Lead moderately rugose, tending to transversely striate on the front, smoothest 

 around the ocelli and over to the eyes ; scape and antennae minutely roughened ; 

 prothorax roughened, with the exception of the dorso-posterior portion; the dor- 

 sal portions of the other thoracic segments coarsely striate ; posterior coxse ru- 

 gose-punctate ; abdomen smooth, as in the other species ; ovipositor as long as the 

 body; head and thorax covered with silvery pubescence; the thorax more 

 sparcely than the head, legs covered with very short brownish pubescence ; 

 wings sub-hyaline, nervures piceous, a brown stain the width of the stigma ex- 

 tending from the stigma to the cubital nervure. a faint trace of brown stain on 

 each side of the transverse medial nervure and at the apex ; eyes, head, thorax, 

 spot at base of the first dorsal abdominal segment, a trace at the apex, greater 

 part of the third and the rest of the abdominal segments black, the remaining 

 space on the abdomen translucent red ; posterior legs black ; the anterior pairs 

 almost black. Length 13.5 mm. 



"Apparently near to 0. firmus Cresson, from which it differs, how- 

 ever, in the faintly impressed dorsum, the closer arrangement of the 

 ocelli, the uniformly different sculpture and smaller size. 



"One female, Riverton, N. J., June 17, 1900; collected by Mr. 

 Chas. W. Johnson," Henry L. V-iereck. 



* Ann. Soc. Ent. Fr., Ixvii, p. 814. 



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



