132 G. T. LYLE. 



Bihar & Okissa : Pusa, a unique 5 reared from Achaea janaia, L., 7.x. 1912 

 (C. R. Dutt). 



R. percitrrcns sp. n., has a strong but probably superficial resemblance to 

 Heterogamus dispar. So far as colour is concerned the resemblance is to the S of 

 that species. In colour, however, dispar is notoriously variable. It is possible that 

 the darkening of the thorax and abdomen in permrrens owes something to the drying 

 up and discoloration of the underlying musculature of these regions. 



H. dispar is easily separated from the present insect {a) by the basal antenna! 

 joints, which are at least twice as long as broad (fig. 2) ; {h) in the wings (fig. \, c, d), 

 the radial ceU is longer and more acute, the second cubital cell " higher " (?, ^), 

 the second abscissa of the radius being just shorter ($) or much shorter {$) than the 

 first intercubital. The same abscissa is again equal to ($) or much shorter than (^) 

 the second intercubital. The radius and cubitus are less abruptly divergent distally 

 and the stigma is narrower. In the abdomen the median keel is percurrent to the 

 posterior margin of the second tergite only in the material available for examination. 



