_58 Deutsch. Ent. Zeitschr. 1909. 



The mandibles show a progressive series which correlates 

 with that afforded by the wings. In Hyptiogaster we have the 

 most primitive wing , and a very simple type of mandible ; in 

 Pseudofoenus appears a small recurved tooth at base which becomes 

 enormously developed in Foenus at the same time that the man- 

 dibles become short and thick, while in Rhydinofoenus this tooth is 

 by far the largest part of the mandible , and the apex itself 

 remains as only little spurs , without notches or teeth beneath. 



Fjufoenus Szepligeti is a synonym of Hyptiogaster , its type 

 being fixed by inclusion as B. antennalis. It was published the 

 same year, 1903, but a little later in the year than Hyptiogaster. 



Table to the genera of F oeninae. 

 A. Cell M4 in the front wings in its normal position, its caudal 

 border on a line with Cu and Cuj ; mandibles without a 

 recurved tooth at base ; femora and tibiae sometimes much 

 swollen but not clavate ; claw very large ; head and neck 

 not elongate. Hyptiogaster Kieffer. 



(Type Gasteruption antennale Schletterer.) 

 AA. Cell M4 in the front wings crowded caudad , so that its 

 cephalic border is in line with Cu and Cuj, or fused with 

 M3 (or perhaps R) ; mandibles with recurved tooth at base; 

 posterior tibiae swollen and clavate. 



B. Mandibles long, a comparatively small recurved tooth 

 near the base and irregulär teeth between it and the 

 cipex ; tarsal segments long , the metatarsus not ex- 

 ceeding the following three segments together ; claw 

 large ; wings with the cell M^ fused with Mg (or 

 perhaps with R) ; abdomen scarcely petiolate , but 

 little compressed. Pseudofoenus Kiefifer. 



(Type Gasteruption peduncidatum Schletterer.) 

 BB. Mandibles short and stout , bearing a very large re- 

 curved tooth within , and with or without a notch 

 between this and the apex ; tarsal segments short ; 

 the metatarsus considerably exceeding the following 

 three segments united ; claws minute. 



C- Front wings with the cell Mg and M^ separated ; 

 mandibles with a notch within near the apex. 



Foenus Fabr. 



(Type Ichneumon assectator Linnaeus.) 



CC. Front wings with the cells M3 and M4 fused ; 



mandibles without a notch within before the 



apex. Rhydinofoenus n. gen. 



(Type Rhydinofoenus kaweahensis n. sp.) 



