ICHNEUMONOID PARASITES OF THE PHILIPPINES, II 



RHOGADINiE (BRACONIDiE) , IK THE GENUS RHOGAS 



By C. F. Baker 

 (Los Banos, P. I.) 



Genus RHOGAS Nees 



The Philippine species of this genus fall easily into three sub- 

 generic groups. None of these corresponds exactly to any of 

 the recognized European subgenera. The spurs of the hind 

 tibia always fall considerably short of one third the length of 

 the hind tibia, being short, straight, and pubescent in all of the 

 species studied. In a single species, Rhogas brownii sp. nov., 

 they are, in the female, a little longer than usual and slightly 

 curved at the tips. In the Philippine material I have not 

 encountered intermediates between the groups of eye forms, as 

 described below, these being clearly marked and easily distin- 

 guished and characterized by other clearly correlated diagnostic 

 features. In the lighter colored species the interocellar area 

 is always piceous or black. 



Synopsis of subgenera (Philippine species only) . 



a\ Eyes large, very broadly elliptical, distinctly emarginate; malar space 



and cheeks relatively small; ocelli large. 



6\ Radial cell of posterior wings not or very little broadened apically 



though often narrowed at middle; radial vein weak and decolored 



or subobsolete; second cubital cell usually long; fourth hind tarsal 



joint slender; antennse unicolorous or slightly darker apically. 



Aleiodes (Wesmael) Thomson. 

 b'. Radial cell of posterior wings strongly broadened apically, not nar- 

 rowed at middle; radial vein distinct; second cubital cell usually 

 short; legs stout, the fourth hind tarsal joint short and broad; 

 antennae piceous to black, banded with yellowish.. Rhogas Thomson. 

 o'. Eyes small, oval, subelliptical or round, little or not emarginate, re- 

 latively very large; ocelli small; legs with fourth hind tarsal joint 

 slender; second cubital cell short Aleirhogas subg. nov. 



Subgenus Aleiodes (Wesmael) Thomson 



Synopsis of the species. 



a\ Five tergites and, usually, part of the sixth abdominal tergite similarly 

 sculptured; metanotum with a percurrent, median, sharp-rimmed, 

 lanceolate furrow; second cubital cell twice or nearly twice as long 

 as wide, the first transverse cubital vein very oblique; posteromedian 

 mesonotal area with a longitudinal groove. 



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