NORTH AMERICAN COLEOPTERA. 21 



dorsal plates of the first eight ventral segments, close to their junc- 

 tion with the connecting membrane. 



From the above description and the accompanying figui'es it will 

 be seen that the larva is undoubtedly that of a Carabide. It is re- 

 markable that there is, practically, no thoroughly corneous structure 

 in its entire surface, except the head. The absence of ocelli is ac- 

 counted for by its subterranean life. 



While there is possibly room for discussion as to whether this is 

 really the larva of Glyptus there is in my own mind no doubt ; first 

 from the collateral evidence already given, and, secondly the mandi- 

 bles of the larva are a very close reproduction of those of the per- 

 fect insect. 



The Museun\ of Comparative Zoology possesses quite a numljer of 

 these larvte and Dr. Perkins, who is now living, states that they were 

 dug from the nests as stated in the label, which he identified as in 

 the handwriting of Dr. Savage. 



Polypliylla (lecenilineata Say. 



Form of the usual Scai-abitide type, — soft, flat, whitish, the caudal 

 extremity recurved beneath. PI. iii, fig. 8. 



Head brownish, broader than long, convex, slightly scabrous. 

 PI. iii, figs. 9-10. 



Labrum short, crescentic, anterior border arcuate. 



Mandibles stout, curved, slightly curved downward, the apex 

 chisel sha{)ed, slightly sinuous, with a slight notch internally. 



Mentum short, crescentic, the anterior outline oval, its face hairy, 

 the apex with larger cilice, the peduncle of the gula also oval in 

 front. Labial palpi twojointed, arising in a transverse groove behind 

 the apex of the mentum, the joints e(iual in length. PI. iii, figs. 

 13-14. 



JNIaxill^ large, arising on each side of the base of the mentum, 

 the two lobes united, except a slight fissure at apex, the internal lobe 

 with three spiniform teeth at apex, the inner side with stiflfspiniform 

 hairs, the outer lobe with spines at apex. PI. iii, fig. 12. 



Maxillary palpi four-jointed, the first joint very short, second 

 longest, third half as long, the fi)urth two-thirds, the entire palpus 

 projecting but little beyond the maxilla. 



Antenx.e four-jointed, arising from a tubercle at the front angle 

 of the head behind the base of the mandible. First joint stouter, 

 broader to tip, second longer and more slender, third a little longer 



