NATURAL SCIENCES OF PHILADELPHIA. 387 



diiced, spiracles linear ; pleura large, convex beneath ; wings narrow, 

 marginal cell long, lanceolate, pointed at apex, first submarginal 

 cell receiving recurrent nervure before the middle, areolet longi- 

 tudinally subquadrate, nearly twice longer than broad, receiving 

 the second recurrent nervure, which is oblique, at the middle, 

 stigma very narrow ; legs verj'' long and slender, anterior tibiae 

 very short, incrassate, attenuated at base and depressed at tip, 

 their tarsi double the length of the tibii\i and very slender, inter- 

 mediate tarsi longer than their tibiae, while the posterior tibiae and 

 tarsi are about equal in length, their coxae elongate ; claws minute 

 and pectinated ; abdomen nearly twice longer than thorax, only 

 slightly compressed towards apex, first segment sublinear, thick- 

 ened towards apex, second segment a little longer than the first, 

 depressed, slightly widened towards apex, third segment about 

 half the length of second, the remaining segments very gradually 

 shorter; ovipositor two-thirds the length of the abdomen. 



1. Nonnus atratus, n. sp. 



5 Body entirely black ; the two or three basal joints of fla- 



gellum above, and a tolerably broad annulus about the middle, 

 white; disk of metathorax transversely striated ; wings brassy- 

 hyaline, nervures black ; anterior legs, the intermediate tibiae and 

 tarsi in front and base of posterior tibiae more or less luteous, 

 second and third joints of posterior tarsi white ; sheaths of ovi- 

 positor broadly tipped with white. Length 6-8 lines. 



Cordova. (Sumichrast, No. 116.) 



2, Nonnus antennatus, n. sp. 



9, Ferruginous; thorax clothed with a very fine silvery seri- 

 ceous pile; head and antennae black, tlie second, third, fourth, and 

 a part of the fifth joints of the latter above, and a broad annulus 

 a little beyond the middle white ; palpi, except basal joint, also 

 white ; mandibles with a testaceous spot ; mesothorax perfectly 

 smooth, sometimes with a broad central black stripe ; metathorax 

 finely rugulose on disk ; wings brass^^-hyaline, nervures black ; 

 legs pale ferruginous, paler to tips, posterior tarsi blackish, with 

 second and third joints white ; abdomen black beyond second seg- 

 ment, apex with two small white spots ; ovipositor broadly tii)ped 

 with white. Length 5^-T lines. 



% . More slender ; base of antenme honey-yellow ; four anterior 

 tibiae yellow ; two apical joints of anterior tarsi and the inter- 



