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 segment narrow and rounds a little toward 
the front edge. The head is flattened. 1 ip of abdomen rounded ob¬ 
tuse, 10th 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 etraight. 
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. Maxillae 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. Antennae 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 
