252 p. CAMERON. 



PH^OGENINI. 

 ERYTHK01$!iCIINlTS gen. nov. 



Scutellum roundly convex, clearly raised above tlie level of the 

 niesonotum, the sides stoutly keeled to the top of the apical slope. 

 Parapsidal furrows wide, deep on the basal half of the niesonotum. 

 Median segment deeply depressed in the middle at the base: with- 

 out a petiolar area; the areola large, wider than long, of equal 

 width, the sides rounded at the base, the apex transverse ; spiracjes 

 minute, longer than wide. Areolet 5 angled ; the disco cubital 

 nervure unbroken ; the transverse median nervure in hind wings 

 broken near the bottom. Metapleura with a complete keel below. 

 Post-petiole broad. Gastracoeli narrow, but distinct. Legs stout; 

 the hind coxse large and thicker than usual, roundly dilated at the 

 base. Abdomen broad, not much longer than the thorax, bluntly 

 rounded at the apex. Mandibles long, narrow, bidentate at apex. 

 The body is red, the antennse annulated with white. 



The only genus of the Phseogenini, with which the present could 

 be confounded, is Ischnus, which has, like it, a convex and elevated 

 scutellum ; the two may be separated : 



Scutellum strongly keeled to near the apex ; areola wider thau loug, of equal 

 width ; post-petiole wide, clearly separated ; color rufous, anteuna? aunu- 

 lated with white EryUiroiscliiius. 



Scutellum keeled at base only ; areola longer thau wide, not of equal width 

 throughout; jiost-petiole not very wide, not clearly separated ; color black. 



ISCllllUM. 



ErythruiscliniiM aiinulicoriiiN sp. nov. 



Ferruginous; the flagellum of antennae black, the S middle joints white; man- 

 dibles black ; the upper part and apex of mesopleurse, the base, sides and apex of 

 the median segment, almt)st the apical half of the hind femora and the aiiical 

 fourth of the hind tibiai black; wings hyaline, the uervures and stigma back, 

 % . Length 6 mm. 



Head and thorax closely, regularly and strongly jjuiictured, the scutellum and 

 median segment with the punctures as distinct, but moi'e widely separated ; the 

 posterior median area transversely striated. Pleurie obscurely obliquely striated. 

 Basal segments of abdomen closely punctured ; the sides of post-petiole depressed. 

 Prosternum black. Apex of clypeus broadly rounded, as is also the labrum. 

 Antennse stout, shorter than the body. 



Hab. — Mexico. 



MESSOTENINI. 



Mesostenus riifus sp. nov. 

 Rufous; the head, prothorax and mesothorax, excejii on the )»leur(e ■ behind, 

 black ; the under side of antennal scape, face, clypeus, mandibles, the palpi, a 



