The following larvæ (with the exception of the one first described) have the usual Chrysomelid form of which the well-known Colorado Potato Beetle may be taken as a type. In Chrysomela pallida, Say, the body is more elongate, approaching the Coccinellidœ somewhat in form. With the exception of Lema collaris, Say, which forms a sort of cocoon among the leaves, they all enter the earth to pupate. A few of the following larvæ have been described by various authors, and are introduced here merely for comparison.Chrysomela pallida, Say. Body black, elongated, much wrinkled and roughened; the sutures of the segments and the venter sometimes tinged with brown; head and cervical shield polished black; length 8 mm. Lives in communities on poplar. Several of these larvæ entered the earth to pupate June 1st, and the beetles issued about June 19th. (Determination of Dr. Horn.)