372 M. W. R. de V. GRAHAM 



tures ; basal cell of fore wing with at most a few hairs distally 



TRYCHNOSOMA Graham (p. 594) 



- Thorax very weakly arched dorsally, the surface of the scutellum in profile 



appearing virtually flat ; mesoscutum flat discally, with some shallow 

 though distinct piliferous punctures amongst the reticulation ; basal 

 cell of fore wing pilose over about its distal third ANOGMUS Forster (p. 628) 

 in (108) Propodeum with nucha not developed but represented merely by a ridge or a 

 narrow lunate strip, which is very weakly reticulate, transversely aciculate, 

 or smooth, and is usually defined anteriorly by a sharp edge . . . 112 



- Propodeum with a convex, reticulate nucha whose length is at least one 



third that of the propodeum ; usually this nucha is not sharply-defined 

 anteriorly ........... 157 



112 (in) Pronotum without a collar, or if with a defined horizontal collar, then this 



has no trace of a carina anteriorly, though its front edge may be abrupt 113 



- Pronotum with an offset collar which is at least slightly margined in the middle 



by a raised carina, sometimes sharply so throughout . . . .123 



113 (112) Fore wing with distal quarter to one third of basal cell pilose . . .114 



- Fore wing with basal cell, not counting any hairs which may be on the basal 



vein, bare or virtually so ; basal vein sometimes also bare . . . 115 



114 (113) All funicular segments, except sometimes the first, transverse ; combined 



length of pedicellus and fiagellum less than breadth of head. Propodeum 

 short, medially about one third as long as the scutellum, reticulate. Fore 

 wing infumate at least below the marginal vein, sometimes mainly so. 

 Mesoscutum with some shallow though distinct piliferous punctures 

 amongst the reticulation . CECIDOSTIBA (ANASTIBA) sgen. n. (p. 565) 

 Either some of the funicular segments besides the first are quadrate to elon- 

 gate ; or the propodeum is virtually smooth and the fore wing is hyaline ; 

 or the propodeum is longer than half the scutellum . . . . 115 



115 (114) Antennae inserted low down, the lower edge of their toruli not or hardly 



above level of ventral edge of eyes . . . . . . .116 



Antennae inserted higher, the lower edge of their toruli distinctly above 



level of ventral edge of eyes . . . . . . . .118 



116 (115) Gaster oval, not longer than thorax ; propodeum long, medially more than 



half as long as scutellum . . CHLOROC YTUS Graham (p. 611) 



- Gaster lanceolate or sublanceolate, as long as or longer than head plus 



thorax ; propodeum medially less than half as long as scutellum . . 117 



117 (116) Antennal clava appearing asymmetrical in profile, its upper edge more 



strongly curved than the lower edge ; anterior margin of clypeus truncate ; 

 postspiracular sclerite relatively uniformly reticulate, not shiny 



LEPTOMERAPORUS Graham (p. 687) 



- Antennal clava appearing virtually symmetrical in profile ; anterior margin 



of clypeus distinctly emarginate medially ; postspiracular sclerite 

 unevenly sculptured and partly smooth . HABROCYTUS Thomson (p. 494) 



118 (115) Antennal fiagellum (Text-fig. 310) much stouter than the pedicellus, cylindri- 



cal or tapering very slightly distad ; funicular segments with very numer- 

 ous short sensilla, arranged in two rows on each segment, or even three on 

 the proximal ones ; pronotal collar rounded off in front ; spiracles of 

 prooodeum circular ; gaster ovate, not longer than the thorax 



PSYCHOPHAGOIDES gen. n. (p. 471) 



- Either the antennal fiagellum is at least slightly clavate ; or some of the 



funicular segments have sensilla arranged in one row only ; or the pro- 

 notal collar has an abrupt front edge ; or the spiracles of the propodeum 

 are long-oval to sublinear . . . . . . . . .119 



I 



