EPEOLUS. 259 



tex convex ; ocelli placed in a triangle on its summit ; 

 antennae short, linear, the joints of the flagellum sub- 

 equal; face flat, carinated longitudinally in its centre 

 between the insertion of the antennae ; clypeus trans- 

 verse, lunulate, convex, margined anteriorly; labrum 

 transversely ovate, with a small process in the centre in 

 front ; mandibles bidentate, the internal tooth minute, 

 the external robust and broad ; tongue rather long, more 

 than twice the length of the labium, tapering to its ex- 

 tremity ; paraglossa short, about one-fourth the length 

 of the tongue, broad at the base, and acuminate towards 

 the apex ; labial palpi more than half the length of the 

 tongue, the basal joint longer than the three following, 

 membranous, and gradually decreasing to the second, 

 which is one-third the length of the first, and acute at 

 its apex, where the third subclavate joint is articulated, 

 the terminal joint considerably shorter than the third ; 

 labium not more than one-third the length of the tongue, 

 and trifid at its inosculation, the central division being 

 hastate; maxilla subhastate, more than one-half the 

 length of the tongue ; maxillary palpi consisting of one 

 robust short conical joint inserted in a deep circular re- 

 ceptacle. THORAX subglobose; prothorax conspicuous, 

 with its lateral angles slightly prominent; mesothorax 

 with its bosses prominent ; wing scales large ; scutel- 

 lum transverse, gibbous, margined posteriorly, slightly 

 mucronated laterally, slightly depressed in the centre, 

 and impending over the post-scutellum, which is inap- 

 parent; metathorax abruptly truncated; wings with 

 three submarginal cells, and a fourth feebly commenced, 

 the first as long as the two following, the second subtri- 

 angular, and receiving the first recurrent nervure about 

 its centre, and the third lunulate, and receiving the 



s 2 



