THE CANADIAN ENTOMOLOGIST. 3) 
Surface—Smooth shining, with very few wrinkles and a few short erect 
hairs arranged as follows: two on each side of the middle of dorsum, two 
near the anterior and two near the posterior margin of each segment, 
laterally ; beneath, one near the anterior and posterior margins on each 
side ; last segment with more numerous setz. 
Cephalic segment one fourth broader than long, sides straight slightly 
convergent anteriorly, feebly convex and slightly impressed on each side 
near the anterior margin. Mouth directed anteriorly. Ocelli none (fig. 2). 
Antenne short, three jointed, conical, last joint more slender than the 
preceding ; placed at side of head behind the mandibles (fig. 32). 
Superior cephalic plate prominent at middle, middle lobe itself trilobed, 
its lateral lobes acute, middle lobe tridentate. 
Mandibles robust corneous, moderately arcuate bifid at tip and with a 
short acute tooth at middle of inner edge (fig. 4). 
Mentum elongate, slightly broader in front, less corneous in front ; 
palpigerous pieces connate, together subquadrate ; palpi short two jointed, 
basal joint as wide as long, last joint longer conical. 
Maxille composed of an elongate basilar piece on each side of men- 
tum: palpi four jointed ; outer lobe two jointed, terminal joint obtusely 
pointed at tip ; inner lobe feebly developed, concealed behind the outer 
lobe and ciliate on its inner margin. ; 
Prothoracic segment subquadrate. 
Meso and Metathoracic segments shorter than the preceding, and 
together scarcely longer. 
Abdomen, of nine segments, gradually increasing in length, 1st slightly 
longer than metatnorax, last segment nearly as long as the two preceding, 
elongate oval and obtusely pointed at tip. Segments beneath as above, 
last segment subtriangular, base straight, sides rounded. 
Prosternum truncate in front, oval gradually narrowing behind, leaving 
a triangular membranous space between it and the inflexed portion of the 
sides in front of the coxæ. 
Coxe. Anterior narrowly separated, middle more and hinder still 
more separated. 
Legs short. Coxee conical with a double row of short corneous spines 
in front. Femur and tibia short, armed beneath with two rows of spinules 
