1>!64.] 131 



Descriptions of North American HYMENOPTERA. in the Collection of the 

 Entomological Society of Philadelphia. 



BY E. T. CRESSON. 



Fam. EVANIID.E. 



Genus F(ENUS, Fabr. 



1. F. occidentalis, n. sp. 



Black, tliorax rugose, third and fourth segments of the abdomen ferruginous, 

 ovipositor long, valves ti2->f)ed with white. 



Ff'inalii. — Head black, somewhat shining; face and cheeks slightly 

 silvery-sericeous ; antennae black, tinged with piceous beneath. Thorax 

 black, opaque, rather roughly and confluently punctured, mesothorax 

 transversely rugose, especially on the sides ; metathorax scabrous. 

 Wings hyaline, nervures and stigma black. Legs black, the anterior 

 pair and the intermediate tibiae at base tinged with piceous ; the ante- 

 rior tibi?e at base whitish, the posterior tibiae and their tarsi within 

 near their base with a pale spot. Abdomen long and slender, black ; 

 the second, third and fourth segments ferruginous ; ovipositor longer 

 than the body, ferruginous, valves black, tipped with white. Length 

 7 lines ; * expanse of wings 8 lines. 



Varictij 9 • — Has the base of the intermediate tibite white and the 

 basal joint of the posterior tarsi with a broad white annulus ; the sides 

 of the fifth segment of the abdomen are tinged with ferruginous. 



ILth. — Rocky Mountains, Colorado Territory. Two specimens. From 

 the Committee on Collecting Fund, (as well as all other species described 

 in this paper from this locality). 



Seems to be closely allied to F. jaculator Linn., of Europe, which 

 I have not seen. The mandibles have each a very strong, acute, basal, 

 rufous tooth within, as has been observed in Jaculator and several 

 other species. 



2. F. perplexus, n. sp. 



Bhicli : thorax punctured, not rugose ; second, third and fourth segments of 

 abdomen ferruginous : ovipositor long, valves tipped with white. 



FcmalK. — Ulack. Head somewhat shining : antennae slightly pice- 

 ous beneath towards the tip. Thorax opaque ; mesothorax sprinkled 



■•■In giving tin- length of the species described in these papers, the oviposi- 

 tor is not included. 



