Megalostylus fusiformis Champion 1911

♂. Oblong, fusiform, black, densely clothed with subopaque green or golden-green scales, and also set with short, fine, semierect, pallid hairs. Rostrum slightly widened towards the base, broadly excavate anteriorly, the median groove long; antennal scape much thickened outwards, reaching beyond the eyes, the latter rounded and very prominent. Prothorax broad, transverse, conical, the sides slightly rounded anteriorly, the hind angles acutely extending outwards, the base rather strongly bisinuate. Scutellum very small. Elytra with the sides at the base forming an almost continuous outline with those of the prothorax, gradually narrowing from the humeri, finely punctate-striate, the interstices flat. First ventral segment hollowed down the middle, the fifth somewhat tumid along the median line.
 
Length 7 1/3—7½, breadth 2 5/6—2 7/8 millim.

Hab.MEXICO, Rio Balsas, near Cuernavaca (Wickham).

Two males, found in 1909. This insect approaches the green forms of M. albicans and M. splendidus, but differs from them in the fusiform outline of the body, and the largely developed prothorax, with rather strongly bisinuate base and the sides slightly rounded anteriorly. The general shape is very suggestive of that of certain Epitragi (fam. Tenebrionidæ) of the same region.