MmicJiestcr Memoirs, Vol. xliv. (1900), No. 15. 1 1 1 



the mandibles. Clypeus small, separated by a suture from 

 the face, its ajjjex obliquel}' depressed transversely ; the 

 labrum prominent, rounded. Mandibles stout, short, 

 ending in two subequal teeth. Parapsidal furrows 

 distinct. Scutellum large, roundly convex. Median 

 segment with one transverse keel near the base ; its 

 spiracles moderately large, linear, rounded at the base and 

 apex. Wings without an areolet, there being only one 

 transverse cubital nervure; the cubital and radial nervures 

 almost united, the transverse cubital nervures being very 

 short ; the recurrent nervure is interstitial, as is also the 

 transverse median ; the discoidal nervure is obliquely 

 curved on the basal half. Legs elongate, especially the 

 hinder pair, which have the coxre large ; the basal joint 

 of their trochanters more than twice the length of the 

 apical ; the tarsi spinose ; the metatarsus as long as the 

 other joints united ; the intermediate and hinder tibiae with 

 two spurs. Petiole curved ; gradually, but not greatly, 

 dilated towards the apex ; the spiracles placed shortly 

 be}'ond the middle, the second segment triangular, narro\\- 

 at the base, becoming gradually wider towards the apex, 

 which is transverse; the gastrocceli indistinct ; the third and 

 following segments are wider than long; the third, fourth 

 and fifth segments have large depressions on the sides, 

 their middle roundly raised, the hypopygium large, tri- 

 angular at the apex, flat ; the cerci short, stout, pilose. 



The short thick antennce with comparatively few joints, 

 and the similarity in the alar neuration, might place it 

 near Acoenites. In the absence of the 2 , its exact 

 relationship cannot be very clearly defined. 



It comes nearest to the TrypJionides and is closely 

 related to Chreusa, Heviigaster and Macrogaster, with 

 which it agrees in the neuration of the wings and in the 

 paucity of joints in the antennae, but may be known from 



