374 PROCEEDINGS OF THE ACADEMY OF 



DESCRIPTIONS OF MEXICAN ICHNEUMONIDJS. 

 BY E. T. CRESSON. 



(Couliaued from page 176.) 



Genus OPHION, Fabr. 



1. Ophion mexicanus, n. sp. 



9. Large; luteous j-ellow, sliining, clothed with a veiy short 

 pale pubescence; head pale, mandibles and palpi tinged with ful- 

 vous, tips of mandibles dusk}"^; e3'es large, pale ; ocelli ver}^ pro- 

 minent, whitish; antennae as long as body, dark fuscous; thorax 

 opaque ; mesothorax flattened, wath three subobsolete longitudinal 

 fulvous stripes ; scutellum yellow ; metathorax obliquely flattened 

 posteriorly with coarse arcuated and oblique stria?, and a trans- 

 verse sinuate carina near base; tegulffi pale; wings hyaline, ner- 

 vures fulvous, inner radial wing nerve incrassate towards the 

 stigma and recurved, membranaceous spots in first submarginal 

 cell hyaline, consisting of a cuneiform spot and beneath it a 

 narrow curved line, broadly dilated towards apex of wing ; legs 

 slender, femora darker in color than the remainder; abdomen 

 tinged with brown, first segment slender, slightly and graduall}^ 

 dilated at apex. Length 1 inch. 



Cordova. (Sumichrast, No. 94.) 



2. Ophion thoracicus. 



Ophion Ihoracicus, Cress., Proc. Ent. Soc. Phila., iv. p. 55. 



Cordova. 



3. Ophion flavus. 



Opltio7ifl(t'cuf, Fabr. Ent. Syst., ii. p. 179. 



Cordova. (Sumichrast, No. 12T.) In two specimens the apex 

 of abdomen is brown. 



4. Ophion atriventris, n. sp. 



9. Large, robust, black; eyes very large, occupying the entire 

 side of the head, the ocelli very large and prominent ; head, scape 

 of antenna^, thorax, tegulne, four anterior legs, and posterior coxfe 

 and trochanters, hone^'-yellow ; spot covering ocelli, tips of anterior 

 tarsi and whole of middle pair blackish ; mesothorax smooth, tri- 

 lobate ; scutellum subconvex ; metathorax somewhat rounded 

 behind, very coarsely reticulated ; wings hyaline, the costa, inter- 



