ASHMEAI) : CLASSIFICATIOX OF TIIIC CIIALCTD FLIES 245 



AlKlonu-n (listiiictly [n'tiolate, the iioticilc the KMij;tli of the inetatlioriix, the Ixxly short, elliptical, 

 not eoinpiessed, shorter than the thorax ; seiitelliim without a eross-furrow before tip. 



Odopoia Walker (type O. atra Walker). 

 Abdomen siibsessile, the body elongate, snbcompressed, the length of the thorax ; scutelluni with 



a cross-furrow before apex Bootania Dalla Torre (type Metamoipha teucospoidea Walker). 



2. Head seen from in front a little wider than long, the oeelli ])laced in a slight curved line ; seutellum 

 with a cross-furrow liefore apex Megastigmus Dalnian (tyi>e Ifhnnimon dort^dix Fahricius. 



SUJ'.KAMILY Y]. OrmykiN.E. 



185G. Orniyruichu, Ftuiiilio X., lAirstei-, Hyin. Stud., II., pp. 1!), 22 and 24. 



1875. Ormyrides, Sul)ti-il»ii.s, Tliomson, Skuiid. Ilyni., IV., p. 100. 



1899. Orinyi-ina% Suhfaiuily V., Ashmead, Proc. Ent. Soc. Wash., IV'., p. 247. 



Df. Aniold Frirstc'i- was the Hrst to sepai-ate tliis gfoup from other I'oiymids. 

 It is a very distinct and compact subfamily, agreeing with the sul)family Toryniin;e 

 in venation and in pleural and pedal characters, but otherwise it is totally different 

 from it and the others. The females are easily recognized by the elongate, pointed, 

 orconically produced abdomen, non-prominent ovipositor, and by its peculiar sculp- 

 ture ; the males by the oblong oval shape of the abdomen, as well as by the sculpture. 



It shows some affinity with the KurytomvJiv, and particularly with my tril)e 

 Kilei/ivi, in the shape of the pronotum, and in antennal and abdominal peculiarities. 



All are bred from hymenopterous and dipterous gall-insects, belonging princi- 

 pally to the families Ciiitiphhf and QxlilonujUdn' ; oidy a few species have been 

 described. 



Only three genera are known distinguished as follows : 



TABLE OF GENERA. 



1. Males ; abdomen oblong, depressed 4 



Females ; abdomen long, conically i)ointed and nioi-e or less eonipres.sed, especially towards the ajiex, 



the ovipositor never prominent 2 



2. Abdomen without a. peculiar sculpture, normal ;? 



Abdomen with a peculiar sculpture, and some of the .segments wit h two rows of pits or dee]) punctures. 



No large, coarse punctures at base of middle abdominal segments ; antenuie with one ring- 

 joint Monobseus Foreter (type M. cingulatus Foi-st.). 



With large, coarse punctures at base of middle abdominal segments ; antenme with two ring- 

 .joints Ormyrus Westwood (type 0. puncliger Westw.). 



3. Abdomen (inely iiunctate ; antenna; with three ring-joints. Tribaeus F6rster(type T. punctulaliis Forst.). 



4. Abdomen without a peculiar sculpture 5 



Abdomen with a peculiar sculpture. 



Antennffi with one ring-joint Monobaeus Fiirster. 



Antennte with two ring-joints Ormyrus Westwood. 



5. Antennre with three ring-joints Tribaeus Fiirster. 



