Asinn:Ai) : classification ok tiif, chalcid fi. 



317 



23. Pronotum broad, the fiout niai-itiii acute ; metuthoracic spiiacles oval or obloiij; ; lirst joint of the 



fuiiielc always longer than the pedicel Habrocytus Thomson. 



Pronotum not broad, the front marj^iii not acute ; first joint of the funicle m\i(li shorter than the jiedi- 

 cel Mormoniella Ashnnad. 



Trii5k 111. EntcHiti. 

 In its niaiidiliular clKii'uctcrs litis Irilju agrees with tlu; llJidphitclhii, uiul is easily 

 confused with the latter ; hut the aiileniiie are inserted dillerently, always low down 

 on the face, usually close to the clyj)eu.s, on or hdow an imaginary line drawn from 

 the base of the eyes. 



The species falling in this group diller also in habits since they attack diptertnis 

 gall-makers, ('cciiJouii/cidu; etc. 



TABLK OF (lEXKRA. 



1. Females 2 



Males 7 



2. Metathorax wilh distinct lateral folds 3 



Metathorax without lateral folds. 



Marginal vein not or only a little lonf;er than the stigmal vein ; nutathorax long ; fust joint of 

 the fiagellum short. 



AnteuniB inserted on an imaginary line drawn from the base of the eyes ; abdomen not 

 compres.sed, the ventral valve normal. Amblymerus Walker (type A. dubius Walk.). 

 Antennffi inserted just above the clypeus, below such an imaginary line ; abdomen com- 

 pressed, the ventral valve prominent Psilonotus Walker (type /'. adamas Walk.). 



3. Thorax short ; head with a rather narrow vertex, the ocelli arranged in a very short obtuse angle . . 4 

 Thorax long ; head with a broad vertex ; ocelli large, in a triangle ; pronotum wilh the front margin 



acute ''' 



4. Marginal vein about twice as long as the stigmal vein Eutelus Walker (type E. i-H/yar/x Walk.). 



Marginal vein not nearly twice as long as the ttigmal vein. 



Platymesopus Westwood (type /'. tibialis Westw.). 



5. Abdomen ovate, shorter than the thorax li 



Abdomen long, conieally produced, triangularly compressed or carinate beneath. 



Marginal vein hardly twice as long as the stigmal vein. 



Platyterma Walker (type /'. xobilc Walk.). 

 Marginal vein nearly thrice as long as the stigmal vein. 



Mesopolobus Westwood (type ^f. fanciireiitrix Westw.). 

 G. Marginal vein hardly longer than the stigmal vein ; antenuic rather short, the flagellum subclavate, 

 the pedicel long, obconical, the funicle joints wider than long ; metathorax not short, wilh a me- 

 dian carina, the spiracles oval Nasonia Ashmead, g. nov. (tyi)e N. brciicornis Ashm.). 



7. Thorax short ; head with rather a narrow vertex ; ocelli arranged in a very obtuse angle S 



Thorax long ; head with a bioad vei-tex ; ocelli large, arranged in a triangle !> 



8. Marginal vein about twice as long as the stigmal vein ; middle tibiie normal .Eutelus \\'iilker. 



Marginal vein not nearly twice as long as the stigmal vein ; middle tibiie broadly dilated. 



Platymesopus Westwood. 



