Synopses & Reviews
Synopsis
Excerpt from Transactions of the American Entomological Society, Vol. 39: Hall of the Academy of Natural Sciences of Philadelphia, Logan Square
The characteristic hump and median sulcus of the thorax presents great variety of shapes and sizes; a common feature is to have the thorax cut away behind, leaving the upper edge more or less carinate this cutting away is spoken of as being declivous behind, and in very many forms the part next the sulcus and some of the hump anteriorly is more or less colored or darkened so that the thorax appears spotted. The base of the declivity runs around the hump more or less plainly to the front and forms the basal sulcus. The sculpture of the elytra (aside from the punctures) con sists primarily of four lines or costae, a sutural, median, humeral and sublateral. From being entire, they vary to wholly absent, but in a great majority of cases they are more or less present, though broken or divided or varied by humps, tubercles or ridges. The most constant and im portant appear to be the median and humeral, especially the latter. The shape of the prosternum presents great differ ences and should be carefully compared.
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