l6 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 94 



Material examined. — Six males and three females from Colima 

 Volcano, Jalisco, L. Conradt. Specimens from this lot have been 

 compared with the type by Arrow. 



CHLAENOBIA DISSIMILIS, n. sp. 



Head moderately coarsely and densely punctured near eyes, rest 

 of frons, vertex and clypeus sparsely punctured. Clypeofrontal 

 suture feebly impressed and biarcuate. Clypeus flat with outer fourth 

 gradually reflexed, its anterior margin feebly and broadly indented. 

 Antenna ten-segmented. Pronotum transverse, side margins obtusely 

 angulate well before the middle, lateral marginal carina weakly 

 sinuate just before the posterior angle as viewed from the side, 

 viewed from above anterior and posterior angles acute, not produced ; 

 punctures a little more coarse than those of head, sparsely placed 

 on disk, very sparsely on flanks. Elytra with sutural margins strongly 

 tumid, discal costae obsolete ; punctures almost as coarse as those on 

 pronotum and a little more densely placed ; epipleura very narrow, 

 obsolete toward apex. Metasternum coarsely and densely punctured 

 at sides, very finely and very densely at middle except for the small 

 median area, which is puncture-free ; vestiture sparse at sides, very 

 dense at middle. 



Male. — Antennal club about one-third longer than second to seventh 

 segments combined. Abdominal sternites each with a median patch 

 of short, fine and dense hairs, sixth with a shallow median longitudinal 

 impression, its free margin transverse, not noticeably produced. 

 Pygidium strongly convex, rather sparsely punctured, apex sub- 

 transverse and slightly lipped. Anterior tibia moderately stout, bi- 

 dentate. Second segment of anterior tarsus oval, about two and one- 

 half times as long as wide. Aedeagus, figure 8. 



Female. — Antennal club a little shorter than second to seventh 

 segments combined. First and fifth abdominal sternites convex, not 

 modified, sixth sternite with a broad and rather deep pit on either 

 side of the median line, its free margin strongly tumid and sinuous. 

 Pygidium with a pair of strong, conical bosses on basal half which 

 are confluent basally, apical half excavate, apex transverse. Punctures 

 sparse on basal half, almost w^anting on apical half. Anterior tibia 

 short, distinctly tridentate. 



Length. — 14.5 to 16 mm. 



Type locality. — Venodio, Sinaloa, Mexico. 



Type.—V.S.^.M. no. 51043. 



