90 
[FTH REPORT OF THE ENTOMOLOGICAL COMMISSION. 
It becomes a papa either in the autumn or spring. (Can. Ent., xviii, 13, 
188().) In the absence of the larva of any 
other species of this or an allied genus, for 
comparison, we have compared the larva 
with that of Xylotreehut colon us. 
Beetle. — Brown, punctured, covered with aD ashy 
woolly pabesoenoe; elongated linear; anteuuie 
scarcely shorter than the body ; second and third 
joints with a terminal spine; elytra parallel, trun- 
cated at the apex and armed with a spine at each 
angle, the outer spine rather long and incurved. 
Length .55 inch. (Le Conte.) 
Larva. — The body very closely resembles A', colon it a t 
Fig. S2.—Elaphidum parallelum. but is larger and broader, especially on segments? to 
(Alter Smith.) . .,,.., „, 
9, but in general appearance is closely similar. Pro- 
thoracic segment scarcely wider than the mesothoracic, but not so much swollen as iu 
Xylotrechus. The disk is regularly transversely oblong, the sides not convex but 
straight, the edges in front and on the sides brown. The disk is one-half as long as 
broad ; posterior half free from hairs, not so distinctly marked as in X. colonus, but the 
longitudinal irregular pale streaks are present. The mesothoracic and metathoracic 
segments are as wide as the prothoracic, but the mesothoracic is a little shorter than 
the metathoracic. The mesothoracic segment is divided into two lateral portions by a 
scutel-like, very short and broad callosity which is narrow, lanceolate-oval. The 
metathoracic segment has a similar callosity, but a transverse fleshy ridge is present, 
not fouud on the mesothoracic segment. Beneath is a callous brown spot incised in 
the middle, longer and narrower than those on the six succeeding segments. That 
on the prothoracic is much shorter and narrower thau on the mesothoracic, the latter 
not divided raesially, where those on the metathoracic and three succeeding segments 
are partly divided by the median line of the body, forming two irregular oval patches 
touching the median line of the body, and with the outer, hinder edge produced a 
little posteriorly. On the first abdominal segment is a transverse, short but very 
wide crescent-shaped callosity with swollen margins; on the succeeding segments 
these become longer and narrower, until on the fourth segment they become one-half 
as long as broad; on the hinder segments (5 to 7) they become still longer and trans- 
versely oblong-oval, with irregular broad thickened patches. Beneath, on the seg- 
ments behind the fourth, the callosities disappear, but there are raised smooth oval 
areas. A pair of thoracic feet on each of the three segments; they are three-jointed, 
basal joint membranous; second joint about three-fourths as long as wide; third 
joint about two-thirds as wide as the secoud, and slightly longer. The ninth ab- 
dominal segment but little narrower than the eighth; the tenth about one-third as 
wide as the ninth. A pair of mesothoracic spiracles and eight abdominal pairs. 
Head not quite so large in proportion as in X. colonus. Labruru small, not quite so 
broad as in X. colonus, convex and well rounded in front, and very hairy. Mandibles 
black. 
Antennae four-jointed, first joint apparently divided into two subsegments; third 
a little longer and narrower than the second; the fourth minute, obtuse, one-half as 
long as the third is wide. Maxilla? with the lobe rather small, reaching to near the 
end of the third joint of the palpus. Maxillary palpi four-jointed, second joint 
slightly shorter and narrower than the first; fourth half as thick as the third and 
pointed at the tip. Labium with the mentum nearly square, narrower than the sub- 
ineutum. The ligula, which is very small iu X. colonus, is here entirely wanting. 
