274 * [September 



Uah. — Illinois. Dr. Samuel Lewis. 



This little species has much the general appearance of an Exochus, 

 but the face is flat and not protuberant. The metathorax and base of 

 the abdomen are acutely carinated and the legs are short and thick. 



S. Tryphoni limatus, n. sp. 



Black, polished; mouth yellowish; antennse brownish; legs fulvous, hind 

 tibiee white, their tips and the tarsi black; wings hyaline, areolet oblique, peti- 

 olated ; abdomen subpetiolated. 



Male. — Black, highly polished ; face rather densely punctured, some- 

 what protuberant just beneath the antennae ; clypeus very transverse, 

 much depressed at base, and almost entirely yellowish, as well as the 

 mandibles and palpi ; anteuuje nearly as long as the body, brownish, 

 the extreme base black ; tegulne whitish ; metathorax convex, smooth 

 and polished, without elevated lines. Wings ample, hyaline and iri- 

 descent; nervures and stigma blackish, whitish at base; areolet oblique, 

 subtriangular, petiolated. Legs slender, rather long, fulvous, the four 

 anterior tibiae and tarsi paler ; tips of the posterior femora, and tibiae, 

 and their tarsi except base, black ; rest of the posterior tibiae and base 

 of their tarsi, white. Abdomen elongate, subpetiolated, slightly com- 

 pressed at tip ; first segment contracted near the base and gradually 

 dilated to the tip ; second segment at base with a well impressed fovea 

 on each side. Length 4 lines ; expanse of wings 8 lines. 

 Ifab.—TfehwAYe. Dr. Thos. B. Wilson. 



Section 2. 

 4. Tryphoni submarginatus, n. sp. 



Black: most of the face, mouth, sides of mesothorax, scutellum and apical 

 margins of abdominal segments, white; pleura and legs in part pale rufous, 

 posterior tibiae and tarsi black, the former with a broad white annulus : wings 

 hyaline, iridescent, areolet wanting: abdomen subsessile. 



^}Ja/t'. — Black; two ill-defined lines on the face beneath the antennae 

 spreading on each side of the clypeus and continued beneath the eyes, 

 the clypeus, mandibles except tips and the palpi, whitish; antennae 

 slender, rather longer than the body, rufo-piceous, the basal joint be- 

 neath pale. Thorax : mesothorax and pectus black ; tegulae, a broad 

 sutural line before the wings, extending to the dorsal lines where it is 

 suddenly truncate, dilated and pointed before and behind, a line beneath 

 the fore-wing-s and a subobsolete spot beneath the hind-wings, whitish ; 

 pleura, except a space beneath the fore-wings, rufous ; scutellum rather 



