372 CONNECTICUT GEOL. AND NAT. HIST. SURVEY. [Bull. 



iS-jointed; flagel rather slender; all joints at least three 

 times as long as thick; mesothorax polished, with sharply- 

 defined, entire parapsidal grooves; two foveae at base of 

 scutel separated by a carina; propodeum with two superior 

 parallel ridges, which at middle of disc are strongly- 

 divergent, then angularly bent and converging to the 



peduncular thoracic articulation 22 



Second abdominal segment not overhanging all the others; 

 face with radiating striae; mesothorax transversely 

 wrinkled anteriorly, its posterior margin medially arcuately 

 emarginate, and laterally more or less arcuately prolonged 

 or rounded out, each pronounced emargination also with 

 an interrupted transverse furrow, arcuately- curved, parap- 

 sidal grooves wanting or not distinctly marked; abdomen 

 petiolate; a suture between mesothorax and scutel, ante- 

 rior margin of latter in front of transverse groove, not 



thickened and carinate or very rarely feebly so 



Neuroterus p. 384 



22. Genera not having the characters of Periclistus, as given 



below, nor those of Xestophanes, which are as follows: face, 

 occiput, mesothorax, and mesopleurae polished, bare and 

 black; cheeks about half as long as eyes; antennae 14- 

 jointed, prothorax near middle of anterior margin pro- 

 vided with two foveae, the space between these foveae 

 polished and bare, base of scutel with two sharply defined 

 furrows; metathorax with two parallel longitudinal ridges; 



claws of posterior tarsi entire 2^ 



Antennae 14-jointed; mesothorax finely wrinkled, punctate and 

 hairy or finely alutaceous and shining; base of scutel with 

 two sharply marked foveae, metathorax with two parallel 

 ridges, claws of posterior tarsi bidentate; abdomen ses- 

 sile, its second and third segments connate, with a more 

 or less distinct suture between; marginal cell closed .... 



Periclistus p. 373 



23. Cheeks half as long as eyes; base of scutel with two sharply 



marked foveae; abdomen sessile 24 



Cheeks less than half as long as eyes; marginal cell open.. 26 



24. Claws of posterior tarsi distinctly or indistinctly bidentate, 



in the latter case the mesothorax sharply transversely 

 wrinkled and the marginal cell closed; antennae 13-, 14-, or 



IS-jointed 25 



Claws of posterior tarsi entire; antennae 14- or 15-jointed, 

 third joint shorter, equal to or a little longer than fourth; 

 base of scutel above with two very large or moderate 

 foveae, lateral foveae lying in perpendicular side of scutel 



Aulax p. 374 



