Eucoleocerus conicicollis Champion 1911

Oblong, subovate, convex, nigro-piceous; or piceous; densely clothed with white scales, the prothorax with two brownish or fuscous spots or interrupted vittæ on the disc, and the elytra confluently, asymmetrically, fusco-variegate; the surface also set with scattered very short, curled, adpressed setæ, the ventral segments with intermixed suberect white hairs. Rostrum subquadrate, slightly hollowed down the middle anteriorly, and with a bare fovea behind the rather long, narrow, triangular nasal plate; joints 1 and 2 of the funiculus subequal in length. Prothorax transverse, rapidly, obliquely narrowed from the base, the base feebly bisinuate, the ocular lobes prominent; coarsely closely punctate. Scutellum large, transverse. Elytra oblong-subtriangular in ♂, subparallel in their basal half in ♀; strongly punctate-striate, the interstices feebly convex.
 
♂. First ventral segment slightly hollowed down the middle, the fifth convex and closely set with long, fine, erect brownish hairs; all the tibiæ unguiculate.
 
Length 3½—4 2/3, breadth 1 2/3—2¼ millim. (♂ ♀.)

The markings on the upper surface wanting, the scales on the elytra brownish-cinereous and the prothorax usually with intermixed pale brown scales on the disc, the others cinereous or whitish.

Hab.MEXICO, Acapulco, Chilpancingo (Höge), Dos Arroyos in Guerrero (H. H. Smith), Salina Cruz in Oaxaca (Knab, in U. S. Nat. Mus.).

The five Salina Cruz examples (all in beautifully fresh condition) are taken as the types, the long series from the three localities in Guerrero belonging to the immaculate form. Coleocerus setosus varies in the same way in the colour of the scales.

Var. The markings on the upper surface wanting, the scales on the elytra brownish-cinereous and the prothorax usually with intermixed pale brown scales on the disc, the others cinereous or whitish.