teeth is a smaller, tootli-liko projection ; at the tip of the abdomen there 

 are two divergent spines. 



Both larva and pupa of this insect are in perfect accordance with those 

 of other Tenebrionidse, and especially of the genus Tenebrio, except that 

 the skin of the larva is of a softer substance than is generally the case in 

 this family. Hardly any difference will be found, for instance, between 

 my description of the parts of the mouth and that which Erichson gives 

 of the larva of Tenehrio molitor (Chapuis & Candeze, 1. c. p. 514). It re- 

 mains, therefore to find out the generic diff"erences of the larvae by a close 

 comparison of specimens, and not merely of descriptions. ■ 



Dr. Horn, who discovered this larva and communicated it to me, states 

 (Proc. Ent. Soc. Phila. I, p. 80) that it inhabits black-oak stumps, and 

 may be found in company with the larva of C. calcaratm. 



EPILACHNA BOREALIS Muls. 



Several larvae of this genus having been described before, (see Chapuis 

 & Candeze, 1. c. p. 635, tab. IX, fig. 10, and Candeze, Histoire des metam. 

 de qlq. larves exotiques, tab. VI, fig. 8) and mine agreeing with them in 

 all essential characters, it is not necessary to give here a detailed descrip- 

 tion. I will only mention that the antennae are somewhat longer than 

 those figured by Candeze (1. c. fig. 10) and that the fourth ocellus is ex- 

 tremely minute, so that there are, in fact only three distinct ocelli. 



The larva is very common on the leaves of the pumpkin. It is yellow 

 with long, brown, branched spines, arranged in rows of six on each seg- 

 ment, except the first thoracic segment, which has only four. The pupa, 

 instead of spines, has short bristles, especially on the thorax. 



UNKNOWN LARV.ffi, 



related to either of the groups of Lfunpyrida, Telcphoridcc and Elaterid(z. 



(Plate 1. Fig. S.) 



Among the larvte now before me for description, there are several un- 

 known ones, belonging apparently to three distinct species of the same 

 genus. One of the species, of which I have three specimens, comes from 

 Louisiana and New Mexico. The second one (communicated to me by 

 Dr. LeConte) is from Arizona. Both are from 2* to 3 inches long. The 

 third species is represented by a single specimen, about an inch long, 

 found by Dr. Horn in Pennsylvania. 



The following is the description of the first of these species :- 

 Larva 2f inches long (one of the specimens, measuring only 1| inch is 

 perhaps not full grown), linear, slightly attenuated at both ends, convex 



