320 J. CHESTER BRADLEY. 



A. Anteniife inserted far above the clypeus, at about the middle of the face, 



front wings without more than one recurrent nervure. 



1. Tibiae normal. Abdomen attached by a slender petiole to the superior 



margin of the mesothoracic truncature, distant from the scutellum. 



Subfamily I, Evaniin^. 



2. Tibiae clavate, much swollen at apex. Abdomen attached to the base 



of the propodeum, approximate to the scutellum. 



Subfamily II, Gasteruptioninjs. 



B. Antennse inserted just above the clypeus. Front wings usually with two 



recurrent nervures Subfamily III, Aulacinje. 



Subfamily III, Aulacin^. 



1840-42. A uJacidse ShncAvdrd, family. Newman's Entomologist, p. 121. 

 1887. Aiilacinx Cresson, subfamily. Synopsis Hymen. America, p. 36. 



Medial thoracic lobe often gibbous and emarginate, always trans- 

 verse striate. Front wings with two recurrent nervures, of which 

 the second is generally partially obsolete. Hind wings with a me- 

 dian cell, except in Pammegischia. Tibiae normal. Abdomen club 

 shaped. Ovipositor exerted and long. 



A marked sexual character exists in the hind coxse, which are 

 normal in the males, but in the females are sculptured on the inner 

 surface with a groove at the base of which is a well marked tooth, 

 and this in Pammecj'ischia is greatly prolonged. 



An available character for generic separation, first recognized by 

 Kieffer,* is to be found in the sculpture of the tarsal claws. The 

 species of the genera thus defined are also united by other charac- 

 ters, so that they are truly natural groups. 



The subfamily differs markedly in appearance and habits from 

 the other two. The si^ecies, so far- as known, are parasitic on the 

 larvae of Coleoptera. Pammegischia xiphydrice Ashm. has been 

 bred from Xiphydria provancheri. There are five genera, all 

 represented in America. 



A. Posterior wings with a distinct median cell. Hind coxje of the females not 

 greatly prolonged within, but with a tooth on the inner margin. 



1. Anterior margin of the prothorax more or less angled with a strong 



tooth at the angle. Tarsal claws with four teeth beneath. 



Deraiodouiusi uov. gen. 



2. Anterior margin of the prothorax rounded, without a tooth. 



a. Tarsal claws with four teeth beneath Prisfaillacus Kieflfer. 



b. Tarsal claws with three teeth beneath Oleis<»|»rister nov. gen. 



c. Tarsal claws with one tooth beneath Aulaciis Jurine. 



» Ann. Soc. Ent. Fr., Ixvii, p. 813, 1899. 



