AMERICAN HYMENOPTERA. 371 



body and wings, and the almost obsolete parapsidal furrows. In 

 some respects it comes near Joppoceras, e. g., in the blackish wings 

 and thickened antennae. In Ashmead's table it would come in near 

 Opisoxestus and Didemtella. 



Welanocryptus violaeei|>eiiui!« sp. nov. 



Black ; the anterior tibiae pale in front ; tliorax for the most part opaque ; the 

 median segment alutaceous, ?. Length 12; terebra 5 mm. 



Face closely punctured, keeled in the centre; the keel becoming smaller at 

 the ends. The depression at the base of the median segment is closely longitu- 

 dinally striated, and there is a similar striated band on the apex of the raetano- 

 tum in the centre. The whole segment is coarsely coriaceous, except at the base. 

 The basal keel reaches to the metapleural keel : the second is more distinctly and 

 squarely bent backwards in the middle and does not extend to the sides. The 

 scutellum is roundly convex and is more shining than the mesonotum, and is 

 more widely and distinctly punctured ; the apex of the basal depression is irregu- 

 larly striated. Wings uniformly fuscous-violaceous; the nervures and stigma 

 black. Abdominal petiole smooth and shining; the 2nd and 3rd segments are 

 more ojiaque; the others have a dull bluish tinge; the segments are narrowly 

 white at the apex. 



Rab.- Amazons (Prof. I. W. H. Trail.) 



COSMIO€KYI»TUS gen. nov. 



Antennae black, ringed with white; the 3rd joint slightly but dis- 

 tinctly longer than the 4th. Median segtnent broadly and deeply 

 depressed at the base; coarsely reticulated, except at the extreme 

 base, the sides stoutly spined ; there are two transverse keels, and 

 in the centre, between them, is a short transverse one united by 

 longitudinal keels to the basal one. Median segment large. Metas- 

 ternal keel stout, reaching to the coxse. Wings uniformly deep 

 fuscous violaceous; the areolet large; the radial cellule long and 

 narrow ; the disco-cubital nervure with a stump of a nervure ; the 

 transverse basal nervure interstitial ; the transverse median nervure 

 is broken distinctly below the middle. Metathoracic spiracles elon- 

 gated oval, of moderate size ; the petiolar spiracles are placed close 

 to the base of the post petiole ; on the 2nd segment the spiracles 

 are placed in the middle. Abdomen smooth, impunctate 



The head is obliquely narrowed behind the eyes, the malar space 

 is moderately large; the face is roundly convex in the middle; the 

 clypeus is distinctly separated from it and is also roundly convex, 

 its apex is broadly rounded ; the labrura is short, but distinct; the 

 legs are normal ; the apices of tlfe tarsal joints are spined. The scu- 

 tellunj is roundly convex ; the keels do not extend beyond its base; 



TRANS. AM. ENT. SOC, XXVIII. OCTOBKR, 1902. 



