G. C. DAVIS. 247 



and apical portion of abdomen piceous; palpi white; flagelluni of antennae red- 

 dish brown, large, longer than body and of even size throughont; wings large, 

 hyaline; nervures and stigma honey-yellow; areolet pentangular in form, but 

 outer nervure wanting; legs long and slender; metathorax declivous, polished, 

 completely areolated, the superior median area hexagonal ; abdomen subcom- 

 pressed at apex ; petiole slender, arched ; face punctured, tuberculate beneath 

 antennje. 



One specimen from Colorado (type, coll. Amer. Ent. Soc). 



CAMPOTHREPTUS Foerster. 



Cainpothroptus iiawiif us Cress. (Mesoleptiw), Trans. Am. Ent. Soc. ii, 103. 

 TryphonJ nasutHS Cress., Trans. Am. Ent. Soc. ii, 107. 

 9 'J,.— 4 mm. Black; me.sonotnm, sternum, pleurae, pectus, scutellum. front 

 and clypeus, pale rufous, varied more or less witli white; narrow annulus toward 

 apex of antennte in 9- orbital lines, cheeks, mouth-parts and venter, wliite; legs 

 dirty honey-yellow varied with white ; wings long, hyaline, nervures and stigma 

 pale yellow; areolet wanting; transverse median nervure uniting back of the 

 basal; head small, polished; eyes large and prominent; front oval, coarsely 

 punctured ; clypeus large, and in 9 with a curved projection like the bill of a 

 fisli-hawk at upper side and beneath a mouth-like cavity, in % strongly arched, 

 not hooked ; antennse slender, long; thorax polished and punctured ; mesonotum 

 trilobed. deeply depressed on median apical portion and deeply and broadly ex- 

 cavated before scutellum; scutellum flat, elevated apically, and with lateral 

 carinse; metathorax rugose, carinate, with apical carinse most prominent; ab- 

 domen closely and rugosely punctured with segments even ; ovipositor exserted 

 1 mm. ; basal segment broad, oval above and longitudinally aciculate. 



Ten specimens from Michigan, Illinois, Pennsylvania, North Caro- 

 lina and Colorado (type, coll. Amer. Ent. Soc). 



This species differs so materially from the European genus Grypo- 

 centrus, and shows so many characters common with the Plectiscini, 

 that it has been placed here provisionally. It will probably form a 

 new genus. 



Tribe CTENOPELMINI. 



1. Abdomen distinctly petiolate or subpetiolate "2. 



Abdomen not distinctly petiolate, nearer sessile 9. 



2. Tarsal claws toothed with long and thick teeth 3. 



Tarsal claws with fewer, shorter, or more distant teeth .5. 



3. Clypeus scarcely elevated above face, not compressed at tip. . Rliorus Foer. 

 Clypeus plainly elevated and compressed at tip 4. 



4. Wings without an areolet L.abroctoinis Foer. 



Wings with an areolet I'leiiopelilia Holmgr. 



5. Segment 1 much broadened behind the spiracles and all the following as 



broad as long 6. 



Segment 1 only partially broadened behind the spiracles and all the following 

 not as broad as long 7. 



6. Clypeus with a transverse ridge; ovipositor straight; metathorax indistinctly 



areolated Oetophor us Foer. 



Clypeus without a transverse ridge ; metathorax distinctly areolated. 



Synnplierta Foer. 



TEANS. AM. ENT. SOC. XXIV. SEPTEMBER. 1H97. 



