1918] Brues — New Species of Evaniafrom Cameroons (Hymenoptera; Evaniidae) 93 



0.032 mm.; II, 0.032 mm.; Ill, 0.128 mm.; IV (0.032 mm. + 0.176 

 mm.)- Beak reaching to the hind coxse, cornicles 0.048 mm. 



Second instar. Similar to the last in general color. Antennae of 

 five segments with the measurements as follows: Segment I, 0.048 

 mm.; II, 0.048 mm.; Ill, 0.112 mm.; IV, 0.08 mm.; V (0.048 

 mm. +0.224 mm.). Cornicles 0.08 mm. Beak reaching beyond 

 the second coxae. Hind tibia 0.272 mm. 



Third instar. General color similar to that of the previous in- 

 star, excepting that it is somewhat darker in color. Antennae of 

 five segments, with measurements as follows: Segment I, 0.064 

 mm.; II, 0.048 mm.; Ill, 0.176 mm.; IV, 0.112 mm.; V (0.048 

 mm. +0.272 mm.); cornicles 0.112 mm. Hind tibia 0.368 mm. 



Fourth instar. General color similar to that of the last instar. 

 Antennae of six segments with measurements as follows: Segment 

 III, 0.224 mm.; IV, 0.16 mm.; V, 0.144 mm.; VI(0.08 mm. +0.368 

 mm.). Segments imbricated but without secondary sensoria. 

 Cornicles 0.192 mm. long, tapering, but slightly swollen on the 

 distal third and distinctly imbricated and flanged. Hind tibia 0.64 

 mm. long; slightly swollen and thickly covered with nearly circular, 

 tuberculate sensoria; length from vertex to tip of cauda 1.76 mm. 

 Type in U. S. National Museum. 



A NEW SPECIES OF EVANIA FROM THE CAMEROONS 

 (HYMENOPTERA; EVANIID^). 



By Charles T. Brues, 

 Bussey Institution, Harvard University. 



In working over a collection of Evaniidae from South Africa, I 

 have had occasion to examine a very interesting species from West- 

 ern Africa. This was contained in a collection of Parasitic Hymen- 

 optera given me by Prof. R. Thaxter, and the type has been de- 

 posited in the Museum of Comparative Zoology in Cambridge. 



Evania flavocoxalis sp. nov. 



Length 5 mm. Black, the antennae brown at the base; 

 palpi, four anterior coxae and trochanters, anterior side of anterior 

 tibiae and posterior coxae below, except at apex, yellow. Wings 

 hyaline with a brown tinge. Body very thinly pubescent, almost 



