152 
one in which the vent is situated. The first segment, the one beat- | 
ing’the first pair of legs, is of a firmer consistence than the others, « 
leathery and smooth above, and as long as the two following together; 
and each of the remaining eleven is marked on the back by about j 
three transverse dorsal folds, which terminate on the sides m large, t 
low elevations, pointed ovate in form, (the pointed ends "jM I 
upwards), one to each segment of the body, except the first and the | 
last. ] 
The spiracles are nine in number, the first larger than the others, 1 
and placed between the first two thoracic segments, the remainder | 
on the abdominal segments lrom the first to the eighth. 1 hey are P 
at the lower ends of the ovate elevations mentioned above, and just I 
within a tortuous longitudinal groove which separates these eleva- J 
tions from a series of prominent tubercles which extends along the l 
sides one tubercle to each segment. Still beneath the just*men-I 
tioned row of tubercles, is another longitudinal groove, and a second ! 
series of tubercles; and these, again, are separated from the ridges | 
which extend across the under surface of the body, by still another * 
irregular longitudinal groove. Finally, these ventral ridges, which ? 
are but one to a segment, have their ends cut off by a series of | 
oblique grooves, each extending from before backwards and inwards, | 
thus forming a fourth series of elevations,—these last being on a 1 
line with the coxae, of the legs borne by the thoracic segments. 
There is little peculiar in this external structure of the segment, 
and it differs but slightly from that common to a great many soft- ir 
bodied, subterranean larvae. 
The legs are about as long as their corresponding segments, and ! 
white with the exception of their claws, which are dark brown at | 
the tips. They are provided with a few slender, white hairs, becoffi-l 
ing shorter and more spine-like towards the end of the leg. 
The head is smooth, somewhat flattened in front, with a few 
slender, scattered hairs. The clypeus is transverse, trapezoidal, 
narrowing forwards, and the labrum is rounded m front. ike air ; 
teume are minute, white, three- or four-jointed, the outer angle or ^ 
the third joint being continued in a cylindrical process (sometime- , 
appearing as a separate, accessory article) which reaches to the m _ 
(* , l j_! M 1 n m fl/Mi h im’nT 
of the triangular fourth joint. 
J 
The maxiiloe are moderately developed. The cardinal and basa 
pieces are not well distinguished; the maxillary lobe is armed witi 
stout spines within; the palpi are prominent and four-jomted. M 
labium is thick and semi-circular, with little appearance of a p ; 
pigerous tubercle. The labial palpi are slender, cylindrical, and um . 
ticulated. The mandibles are dark brown, with black tips, and art; 
without marginal teeth or lobes. 
Pupa .—(Plate IX, Fig. 2.) The pupae are three and a half 
long by two and a half wide. They are white, except the eyes an ) 
the^mandibles, which show through the outer envelope red or wao , 
* Theee ventral tubercles are more prominent in the larva of Oolaspis than in^a |: 
other genera, and are aIso more strongly spinose; but they are tin iri an 
in the figure publish- d in the Third Report of the State Entomologist of Missouri, a 
reproduced in the American Entomologist for 1880. 
