32 AMERICAN HYMENOPTERA. 



face finely punctured ; eyes large, slightly emarginate, surrounded by 

 an irregular yellow band; vertex varied to flavous ; ocelli large, promi- 

 nent, well separated, in one case by a distinct furrow, the two poste- 

 rior close to the tops of the eyes ; antennse as long as body, fulvo- 

 ferruginous, apex sometimes fuscous ; clypeal foveae distinct ; mandi- 

 bles bidentate, tipped with black. 



Thorax and abdomen frequently dark ferruginous. 



Thorax sericeous, shining ; parapsidal furrows well developed ante- 

 riorly, extending back one-third the length of the mesonotum ; scu- 

 tellum connected with the mesonotum by more or less prominent lateral 

 keels ; metathorax areolate, with two transverse and six or eight longi- 

 tudinal distinct keels, the latter emanating from the insertion of the 

 abdomen, the latter edge of the third median area frequently separated 

 by an extra keel. 



Wings slightly fuscous to deep fuliginous, iridescent, often with dark 

 spots in the radial cell of the hind wing ; stigma and base of costa 

 fulvous, nervures otherwise fuscous ; discocubital vein angularly broken 

 and appendiculate, the appendix extending one-third to one-half way 

 across the cell ; nervulus antefurcal to interstitial ; nervellus broken at 

 or below the middle ; first recurrent vein not half the length of the 

 second. Legs fulvous to light ferruginous, usually lighter than the rest 

 of the body, posterior tarsi sometimes marked with black, claws pecti- 

 nate, black. 



Abdomen strongly compressed, apex usually darker. 



Redescribed from cf type, eight 9 and five cf specimens. 



Type. — c?, No. 81, and paratype, d^, No. 81, American 

 Entomological Society, Philadelphia. 



This species is related to Ophioyi bilineatus, but may be 

 easily recognized by the more or less fuliginous wings, 

 stronger and differently arranged areolation of the meso- 

 thorax and larger size. It has been confused with Erenio- 

 tylus texanus Ashmead, and Dr. Ashmead (Transactions 

 American Entomological Society, 23, 193) thought it "ap- 

 parently a synonym of that species." They are, however, 

 distinct, and belong to different genera, as the different vena- 

 tion, areolation of metathorax, etc., show. This might have 

 been learned by a careful study of the original descriptions, 

 but comparison of the types and a good series of specimens 

 leaves no room for doubt. Similarity of description indicates 

 that Ophion ferruginipennis Felt is a synonym of O. slosso7ia, 

 and the types which I have examined show that this is the 

 case. 



