J. CHESTER BRADLEY. 1 2l> 



the posterior concavity is reduced to a small cup like pit in which 

 the neck is inserted, and the rest of the posterior (in this case lower) 

 portion is convex and not separated from the temples. Seen from 

 above, that is looking squarely down on the vertex (Figs. 10, 13 and 

 15), the head of Evaniinte is transverse to almost transverse quad- 

 rate and shows a varying distance between the eyes and the poste- 

 rior margin of the occiput. The sides may be inflated, square or 

 rounded behind the eyes. The ocelli are three in number; the 

 anterior one sometimes somewhat transverse. Whether or not the 

 posterior ones are nearer to each other or to the compound eyes is a 

 character of specific value. The eyes from this view may be promi- 

 nent or not. The profile of the head varies in shape (Figs. 9, 14, 

 16 and 17). It is nearly always broadest below the middle, and 

 narrowed, even bluntly pointed at the vertex. The forehead may 

 be plain or convex. The eye is always more or less .slanting, mak- 

 ing the temples broadest below, and it is of varying length, extend- 

 ing in Evaniella calif ornica (Fig. 9) scarcely below the insertion of 

 the antennae, but usually much below this, never, however, very 

 closely approaching the mandibles. From in front the head varies 

 from round to nearly triangular, or may be somewhat oblong, as in 

 Acanthinevania jyrinceps and A. longigena, etc. The eyes from this 

 position may or may not be prominent; their inner margins are 

 parallel, or somewhat converging. The mandibles have one or 

 more blunt lobes within. The clypeus is usually mucronate or 

 obtusely pointed, not separated from the face above, but sometimes 

 set off laterally by a short groove ; together with the face it is often 

 swollen or broadly convex. There may be a longitudinal carina in 

 the middle of the face and one on each side, and frequently in 

 in Evaniini a short longitudinal interantennal carina. The an- 

 tennse (Figs. 55 and 59) are situated at varying distances apai't, 

 usually about the height of the middle of the eyes, but sometimes as 

 low as the base, depending more on the length of the eves than 

 difference in the actual position of the antenna). The scape in 

 Evaniinte and at least sometimes in Hyptiini is much longer in the 

 female than in the male. The second joint is ordinarily very short, 

 sometimes not so, and this I have always called the pedicel. 1 have 

 counted the flagellum as beginning with the third joint, the rela- 

 tions of which to the fourth are of specific value. There are thir- 

 teen joints altogether in each sex. In the female the flagellum is 



TEANS. AM. ENT. 80C. XXXIV. (17) APKIL. 1908. 



