104 



BRITISH ICHNEUMONS. 



S^Cymodusa 



three red trans-fasciae and the 9 flagelkim basally pure white. Length, 

 5-7 mm. 



Similar to tlie preceding, but the female is instantly known by the 

 white-marked antennae; the male is difficult to distinguish; Thomson 

 says the metanotal costulae are hardly distinct though the base and apex 

 of its hind tibiae are black, while Schm. considers the areolar shorter. 

 The hind femora appear much more frequently black here than abroad, 

 and Capron had placed this form as a different species in his collection, 

 but I trace nothing but this darker colouration which is co-existi'iit with 



more narrowly pale 9 flagellum, since in the typical form the six to ten 

 basal joints are laterally pale and with black femora only the five basal, 

 or in one case second to fourth, joints are internally pale ; the male rarely 

 has the hind femora red with us. 



Usually not uncommon on the Continent and said to there occur on 

 short meadow grass. I find no mention of its late appearance abroad ; 

 with us it is never seen till the beginning of September and is on the 

 wing till near the middle of October ; it is our commonest species, ex- 

 tending to the highlands of Scotland. household and Eaton near 

 Norwich in October (Bridgman), Oreston Quarry in Devon on 20th Sep- 

 tember (Bignell) ; Shere commonly (Capron), Box Hill at the end of 



