160 Journal New York Entomological Society. [Voi. iv. 



the rings are broad, slightly convex, in the middle of the body the 

 dorsal arches of the segments are thickened suddenly so as to give a 

 serrate outline to the back when seen laterally ; the prominences being 

 largest and most acute on the 4th to 7th segments of the body, count- 

 ing from the head. The lateral region is very distinctly separated from 

 the dorsal. The prothoracic segm»^nt narrow and rounds a little toward 

 the front edge. The head is flattened. Tip of abdomen rounded ob- 

 tuse, loth segment small, broad, short, obtuse, not being cylindrical 

 and rounded as usual. Length, .32 inch. 



The above are mostly generic characters. Compared with the 

 larva of Rhopalum there are great differences. The head is broad and 

 unusually flattened, the rudiments of the eyes are more prominent and 

 conspicuous than before, owing to the flatness of the surface. The 

 supra-clypeal piece is unusually short, broad, flat and triangular. The 

 clypeus is very short, subtrapezoidal. The posterior half is sub-triangu- 

 lar, smooth, and the anterior third is roughened with the edge straight. 

 The labrum is nearly three times as broad as long, slightly bilobate, less 

 so than in Blepharipus. The mandibles are large, stout, incurved, un- 

 equally bidentate, the inner tooth very distinct, large, dark and chiti- 

 nous. Maxilla; and labium rather small, cylindrical; palpi acute, as 

 usual . 



Its broad flattened head and body, serrate sides and back, and the 

 conspicuously bidentate mandibles and prominent eye-rudiments, as well 

 as the peculiar flattened abdominal tips, will at once distinguish the larvae 

 of this genus. 



The larva lives in irregular burrows like those of Rhopalum. All the 

 genera of this group apparently have similar habits, living in loose 

 galleries in the elder and other pithy plants. The larvae were found, 

 May 14th, in irregular borings in the larger stems of the elder \ the gal- 

 leries were short, not communicating, and were filled with Aphides, 

 whose black carcasses were found remaining in the old burrows, which 

 were over half an inch long and about .12 inch broad. 



Pupa. — Front much excavated and depressed, eyes and ocelli 

 very prominent. Antennas bent angularly over the base of the man- 

 dibles so that the scape does not rest flat on the front but is raised at a 

 considerable angle before the base of the flagellum bends over ; they 

 reach to the first trochanters, the joints are round, very convex, with 

 broad sutures between. Mandibles very long and prominent, lingua 

 short, not much longer than broad, square at the edge. Maxillae not 

 distinguishable; maxillary palpi 6-jointed, long and slender, reaching 



