AMERICAN HYMENOPTERA. 375 



Catalogue of a small Collection of HYMENOPTERA made in New Mexico 



during the summer of 1867. 



BY E. T. CRESSON. 



The species comprised in this catalogue were collected in New Mexi- 

 co, during the summer of 1867, by Dr. Samuel Lewis, while accompany- 

 ing the Survey of the Pacific Railway, E.D., from Fort Wallace, Colorado, 

 to Fort Craig, New Mexico. Dr. Lewis's specialty being Coleoptera, he 

 made no effort to collect any other Order, and the species enumerated 

 below were accidentally captured in the net while sweeping. The fact 

 of nearly one-half of the species collected being undescribed, shows 

 what a rich harvest a good collector of Hymenoptera could reap in 

 that region of our country. The entire collection has been kindly 

 presented to this Society by the collector. 



]. Urocerus areolatus, n. sp. 



Female. — Black, with a bluish-green reflection; head clothed with 

 black hairs; vertex with large, deep, confluent punctures, and three 

 rather deep, longitudinal furrows; the surface around and about the 

 ocelli, rugose ; cheeks polished, sparsely punctured ; clypeus longitu- 

 dinally striated; antenna) black, shining, punctured, as long as the 

 head and thorax, 24-joiuted; thorax above coarsely rugose, except 

 middle of mesothorax, which is almost smooth; sides of prothorax above 

 more coarsely rugose than rest of thorax ; pleura subdepressed on the 

 sides, coarsely punctured; wings violaceous-black, darker at base and 

 along costa, neuration as in the accompany- 

 ■3^"^^?^^^=:=::;^^ ing figure; legs slender, entii*ely shining 

 black, tinged with blue-green, femora deep- 

 ly punctured, first joint of posterior tarsus 

 three-fourths the length of the tibia ; claws rufo-piceous, with a strong 

 inner tooth, removed from the tip; abdomen above steel-blue, with a 

 slight velvety appearance, very finely sculptured; the venter and sides 

 of dorsal segments shining and tinged with greenish, the former sparsely 

 punctured; terminal dorsal impression deep and rounded; anal horn 

 (cornus) shaped much as in U. cyaneus., being acutely conical, not at 

 all shouldered, much flattened at base above, apex tuberculate, serrate 

 on the sides; ninth segment convex on the sides, smooth and polished, 

 with a few scattered punctures; ovipositor longer than the abdomen, 

 piceous. Length 1-1 lines; with ovipositor 17 lines. 



