398 PROCEEDINGS OF THE ACADEMY OP 



teiior femora and their til)ije whitisli in front; wings fuliginous, 

 with a brilliant purple reflection, changing to golden in certain 

 lights, nervures and stigma black ; antennie as long as the bod^', 

 slender, thread-like, third joint very long, longer th.an the two 

 following ; mesothorax opaque ; metathorax transversely striated 

 above, scarcely so on the sides ; first segment of abdomen angular 

 when viewed in profile, the basal half with a sharp ridge on each 

 side, apical half flattened, the sides not raised ; sculpture very 

 fine and dense, apex smooth and shining; ovipositor about half 

 the length of abdomen. Length 8-9 lines. 



%. Of a brighter blue than the ?, and without any purplish 

 reflection ; palpi white ; third joint of antennae not as long as the 

 two following; mesothorax shining, sometimes slightly longitudi- 

 nall}' impressed on each side anteriorly; metathorax more finely 

 striated than the 9, sometimes obsoletely so; wings hyaline, iri- 

 descent, more or less smoky at tips ; anterior coxaj in front, their 

 trochanters, their femora in front, most of their tibiie and tarsi, 

 the intermediate femora at tips, and their tibiae in front, whitish ; 

 abdomen more linear than that of the 9, more shining, the first 

 segment scarcely angular in profile, and the lateral and apical 

 submargins of the segments much more deeplj' impressed. Length 

 4^-8 lines. 



Orizaba ; Cordova. This may prove identical with P. caerulea 

 Brulld, from Brazil. 



2. Pimpla croceipes, n. sp. 



% 9 . Black, shining, more so in the % ; palpi, base of antennae 

 beneath, and tegulae of ^, and scutellum, yellow ; antennae brown, 

 I);ili'r at base and beneath, especially so in 9; legs orange-yellow, 

 paler at base, posterior coxae and tips of all the tarsi black ; 

 wings hyaline, iridescent, nervures and stigma black ; antennae 

 nearly as long as the body, slender, thread-like, third joint as long 

 as the two following; mesothorax feebly sculptured, slightly im- 

 pressed longitudinally; metathorax finely striated transversely, 

 smooth at base, pubescent on the sides ; basal segment of abdomen 

 as in caeruleata; ovipositor of 9 about half the length of the ab- 

 domen. Length 3-5 lines. 



Orizaba. (Sumichrast, No. 50.) A very common species. 



3. Pimpla punicipes, n. sp. 



9. Dji'P black, opaque ; antennni fuscou:s ; legs entirely dark 



