406 M. W. R. de V. GRAHAM 



143 (142) Propodeum medially barely half as long as the scutellum. Stigma of fore 



wing moderate-sized . . . EULONCHETRON Graham (p. 599) 



- Propodeum, medially, slightly more than half as long as the scutellum except 



in one species which has the stigma small CHLOROCYTUS Graham (p. 611) 



144 (104) Propodeum with panels of median area shiny, smooth or virtually so. 



Pronotal collar finely though sharply margined throughout 



TRICHOMALUS Thomson (p. 707) 



- Propodeum with panels of median area at least mainly reticulate or other- 



wise sculptured. Pronotal collar sometimes immarginate . . . 145 



145 (144) Hind tibia with two spurs. Propodeal plicae represented only by convex 



elevations ; spiracular sulci distinctly impressed. Antennal flagellum 

 very short, only about equal to the distance between the eyes. Vertex 

 and dorsum of thorax with rather stiff dark hairs STENETRA Masi (p. 474) 



- Hind tibia with one spur. The other characters not all present in combin- 



ation ............ 146 



146 (145) Propodeum with plicae represented only by basal foveae and a sharp portion 



occupying at most the hinder half ; spiracular sulci absent or very shallow 147 

 Propodeum either with the plicae nearly or quite complete ; or with the 



spiracular sulci distinctly impressed . . . . . .149 



147 (146) Either the marginal vein is about twice as long as the stigmal vein ; or else 



the antennal scape does not reach the level of the median ocellus. Pronotal 

 collar sometimes margined. 



Left mandible with three or four teeth, right mandible with four 



HOMOPORUS Thomson (p. 444) 

 Marginal vein at most i-6 times as long as the stigmal vein. Antennal scape 



reaching the level of the median ocellus. Pronotal collar not margined 148 



148 (147) Left mandible with three teeth, right mandible with four. Scutellum 



strongly convex. Head 1-3 to 1-4 times as broad as mesoscutum 



PHAENOCYTUS gen. n. (p. 561) 



- Both mandibles with four teeth. Scutellum only moderately convex. 



Head about 1 -25 times as broad as mesoscutum SPINTHERUS Thomson (p. 480) 



149 (146) Fore wing with marginal vein about i-8 times as long as the stigmal vein ; 



stigma rather large, separated by barely twice its height from the costal 



edge of the wing APELIOMA Delucchi (p. 582) 



Fore wing with marginal vein rarely as much as i-8 times as long as the 



stigmal vein, if so then the stigma is relatively smaller . . .150 



150 (149) Postspiracular sclerite broad, mainly reticulate ; pronotal collar sharply 



margined throughout ; spiracles of propodeum small, subcircular, sepa- 

 rated by about their own diameter from hind margin of metanotum 



NEPHELOMALUS Graham (p. 697) 



- Postspiracular sclerite narrower, weakly sculptured. Pronotal collar 



sometimes margined only in the middle. Spiracles of propodeum often 



oval and close to the metanotum . . . . . . .151 



151 (150) Antennal clava as long as, or somewhat longer than, the combined length of 



the three preceding funicular segments ; funicular segments quadrate or 

 nearly so, the first at least very slightly shorter than the pedicellus. 



Mandibular formula 3-4 . . SCEPTROTHELYS Graham (p. 482) 



Antennal clava shorter than the combined length of the three preceding 

 funicular segments ; funicular segments sometimes relatively longer, the 

 first often as long as or longer than the pedicellus . . . . .152 



152 (151) Both mandibles with four teeth. Postmarginal vein or fore wing as long as, 



or longer than, the marginal vein. [Species included in key too* Habrocytus] 



PTEROMALUS Swederus (p. 



