REMARKS ON THE COLEOPTERA. 242 



may be retracted, and is ordinarily not visible in dead specimens ; 

 exterior to these filaments on each articulation is a small fovea. The 

 articulation itself is prolonged each side, for a short distance between 

 the laminae of the expanded epidermis, sothot the outline of the proper 

 fleshy portion is serrate. The legs are slender, the tarsus inarticulate, 

 and furnished with a single claw. 



The pupa is broadly oval, and depressed. The head is concealed 

 under a hood formed by the prolongation of the epidermis of the 

 prothorax. This hood is produced at the posterior angles, so that it 

 becomes exactly similar to the thorax of a Lampyris. 



The front between the antennae is transversely elevated, so that 

 the mouth is situated on its inferior surface. The antennae are three 

 times longer than the head, and inside of the pupa skin (in much 

 developed specimens) are seen to be serrate, and eleven-jointed ; the 

 palpi are two-thirds the length of the antennae, and are somewhat 

 dilated at the extremity. The labial palpi are very short. The 

 labrum is transversely cordate. The wings are bent under the body. 

 The superior ones exhibit the structure of elytra, and have four slight 

 longitudinal ribs : the inferior are membranous, and show a slight 

 transverse nervure near the middle. The abdomen is six-jointed and 

 serrate at the sides, owing to the angular prolongation of each joint, 

 and is entirely free from branchial appendages. The last joint is 

 rounded. The feet are slender, and not armed with a claw. The 

 mesopectus is deeply channeled. . 



After the description just given of the pupa, no one will doubt 

 that the insect belongs to the Coleoptera ; and from the serrate out- 

 line of the abdomen, one would be inclined to refer it to the groups 

 possessing larvae like the Lampyris, Lycus, &c. The separation of 

 the prothorax and its great development, as w'ell as the structure of 

 the superior wings, absolutely exclude it from the Neuroptera, to 

 which I at first referred it. 



The peculiar structure of the head of the pupa, and the great 

 length of the palpi, point clearly to Eurypalpus, a curious genus, 

 which is placed by authors near Cyphon, which, as is well known, is 

 closely allied to the Lampyridae. Eurypalpus differs very much from 

 all the alKed genera, in being aquatic. It is furnished with slender 

 legs, but the, tarsi are long, especially the last joint, which has two 



