— 8 — 



Note. Arthrolytus macidipennis Walker I have 

 seen in Vienna. There were not Walker's types, but 

 some specimens identified by Förster and M a y r. 

 They agreed fairly well with Thomson's description. 

 Arthrolytus riigifrons Thomson (type) has an- 

 tennae with 3 ring joints; pedicel longer than the first 

 funicle joint; the postmarginal vein longer than the stig- 

 mal one. Would better run to Meraporiis Walker. 

 Propodeum with distinct subglobose neck. Abdomen 

 deep, convex above. Head not wide. Wings without a cloud. 

 Pedicel much longer than the first funicle joint 



Lariophagus Crawford. 



44. Vertex broad. Antennae inserted below the middle of the 

 face Psycliophagus M a y r. 



Vertex not broad. Antennae inserted on the middle of 



the face Dirhicnus Thorns. 



Note. From Thomson's description. 



45. Stigmal knob enlarged, pronotum with sharp margin anteriorly. 

 Spiracles round or round-ovate 46 



Stigmal knob normal 47 



46. Propodeum short, without a neck. Clypeus incised medially. 



Cecidostiba T h о m s. 

 Propodeum not short, sometimes with transversal costula 

 and with neck. Head and thorax covered with rigid pubescence. 



Caenacis Förster. 



47. Head triangular, narrowed towards the mouth; eyes large, 

 rounded, convex; praesterna large, mesosternal furrows distinct; 

 spiracles on the propodem rounded, remote from the postscu- 

 tellum 48 



Head not triangular, viewed from in front more rounded, 

 very slightly wider than long; eyes oblong-oval or oval; 

 praesteruH not large; mesosternal furrows not distinct; vertex 

 broad; spiracles on the propodeum mostly lengthened ... 50 



48. Pronotum not distinctly separated from the mesonotum, its 

 front margin always rounded Stinoplus Ihoms. 



Pronotum well separated from the mesonotum, its front 

 margin sharp 49 



49. Vertex broad, abruptly ending posteriorly (not margined!), the 

 front impressed. (By general aspect resembling Cteonymidae). 



Etroxys W e s t w. 

 Note. Etroxys elongatus Thorns, has im margined 

 occiput, but deep concave, resembling that of Dibrachoides. 

 Vertex narrow, occiput not deeply concave . . Holcaeiis Thoms. 



Kevue Russe d'Entom. XIU. 191.'5. № 1. 



