152 PSYCHE [August 



Head distinctly broadened behind the eyes, the cheeks less than half the 

 length of the eye, the malar furrow sharply defined ; scntellum with an arcuate 

 transverse furrow at base ; metathorax with the carinae nearly straight and 

 parallel; antennae in 9 13-jointed, the joints 3-4 nearly equal, joints 5-13 

 slightly thicker and subequal in lengths, in $ 15-jointed (sexual form) 



Loxaulus Mayr 

 (Type L. mammula Mayr.) 



19. Claws simple, without a tooth beneath ; antennae in 9 13-jointed, the first 

 joint of the flagellum not longer than the second . . . . 20 

 Claws with a tooth at base beneath; antennae in 9 14-jointed, in $ 15- 

 jointed, the third joint longer than the fourth. 



Scapulae smooth, without a trace of a grooved or glabrous line posteriorly 

 (sexual form) ? genus. 



Scapulae always with a more or less distinct grooved or glabrous line 

 posteriorly (sexual form) .... Dryophanta Forster 



(Type Cynips folii Linne.) 



20. Head dilated behind the eyes, the cheeks shorter than half the length of the 

 eye; scutellum smooth, with a transverse grooved line at base, separated by a 

 median carina; abdomen large, strongly compressed, lenticular 



Chilaspis Mayr 

 (Type Andricus nitidus Giraud.) 



21. Antennae in 9 14-jointed, in $ 15-1 7-jointed .... 21 



Antennae in 9 16-jointed ........ 25 



Second joint of hind tarsi fully as long as the last or longer, if shorter the 

 claws with a tooth at base beneath . . . . . . 22 



Second joint of hind tarsi shorter than the last, the claws simple ; 9 antennae 

 14-jointed, $ antennae 15-jointed, the third joint strongly emarginate (sexual 

 form) Biorhiza Westwood 



(Type Cynips aptera Bosc) 



22. Metathorax abruptly declivous posteriorly, with two parallel median carinae, 

 the apex of scutellum projecting far over the metanotum ; antennae in 9 14- 

 jointed, in $ 15-jointed, the third joint very long, strongly emarginate, and 

 tliickened at apex; claws with a tooth at base (sexual form) 



Trigonaspis Hartig 



(Type Cynips megaptera Panzer.) 



Metathorax not so abruptly declivous, the scutellum normal, rarely conical or 



pyramidal, most frequently rounded or cushion-shaped, and not projecting 



over the metanotum ......... 23 



23. Middle lobe of mesonotum with a more or less distinct median furrow or at 

 least with a trace of it either posteriorly or anteriorly ... 24 



