-98- 



The genus Philachyra Haliday I have not mentioned as I think it 

 cannot be separated from Isosoma. 0{ Aiolomorfhus Walker, I can form 

 no definite opinion. 



Subfamily TRIDYMINAE. 

 Antennae inserted slightly above the clypeus, which is rounded and produced at the 



apex. Parapsides plainly shown *Genus Tridymus Ratzeburg. 



Antennae inserted at the middle of the front. Clypeus plain, not produced. Anten- 

 nae with both ring joints visible. 

 Parapsides plain. Front impressed with very many dots. 



Wings ciliate at apex Genus Semiotellus Westwood. 



Wings not ciliate. Thorax slighty rugose-punctate. . . . *Genus Systasis Walker- 

 Parapsides not plain *Genus Metasteuns Walker' 



Subfamily SPALANGINAE. 



Body aeneus, wings with a short marginal vein *Genus Isocratus Foersler. 



Body wingless or with a long marginal vein. 



Body not at all or very slightly metallic. Frenum not discernible. 



Body not metallic; mesonotum opaque, punctate; abdomen conico-subulate. 



•Genus Tricoryphus Foerster. 

 Mesonotum submetallic, polished. 



Body winged; metathorax strongly punctate. *GenusCerocephala Westwood. 

 Body winged or wingless; metathorax smooth; mandibles of usual size. 



*Genus Theocolax Westwood. 

 Body winged, mandibles very large, three times the length of the head. 



*Genus Paralaesthia Cameron. 

 Body metallic; antenna; inserted in the anterior margin of the oblong head. Fren- 

 um large, distinct Genus Spalangia Latr. 



Subfamily PIRENINAE. 

 Wings with post marginal and stigmal very short. Ventral valvules not reaching to 

 anus. Antennae short, clavate; at least the two first funicle joints annuliform. 

 Antennae with two ring-joints. Eyes of male strongly converging above. 



Genus Macroglenes Westwood. 

 Antennce with at least three ring-joints. Scuiellar frenum horizontnl. 



Genus Pirene Haliday. 

 Postmarginal and stigmal veins long. Ventral valvules reaching to anus. Antenna: 



with one or no ring-joints. Terebra exserted *Genus Henicetrus Thomson. 



Postmarginal and stigmal vems moderately long. Ventral valvules not reaching to 

 anus. Antennae with no ring-joints. Terebra not exserted. Abdomen with a 

 large tuft of hair each side of petiole Genus Dilophogaster Howard.* 



Subfamily TETRACAMPINAE. 



Mesopleura not divided. (^ tarsi 4-jointed. Marginal vein long, narrow 



*Genus Tetracampe Foersici-. 

 Mesopleura divided. (^ tarsi 5-jointed, Marginal vein large, black, oblong-oval.... 



*Genus Platynochilus Westwood. 



* This name is proposed as a substitute for Tomocera, a genus founded by the 

 writer in 1880 — Ann. Kept. Com. Agr. 1880, p. 368, as the name first given conflicts 

 with the genus Tomocerus of the order Collemhola. 



