162 THE UNIVERSITY SCIENCE BULLETIN. 
Shape. Imperfectly oval, flattened at the upper end, from which arise 
two long thread-like processes, longer than the ovum, and thickened at 
the base, diminishing in thickness toward the apex. 
Markings. Surface of chorion. thickly covered with irregularly cir- 
cular pits, in the middle of which is a point. The processes appear 
smooth. 
The writer has photographed an egg (see pl. VII), and adds the 
following description of them: Length, 2.86 mm.; greatest width, .86 
mm. Filaments, basal, amber-colored part 1.35 mm.; the larger, opaque 
white part, 2.73 mm., the filament measuring a total of 4.1 mm. These ~ 
filaments are placed at the cephalic end of the egg as shown in the 
drawing on plate XVIII. The filament is differentiated into two parts, a 
basal amber-colored part, and an outer, larger opaque white part. The 
basal part has a core of opaque white and a sheath of amber with the 
diameter of the cylinder uniform. The outer part is larger than the 
basal part, and tapers gradually to a point near the tip, where it again 
enlarges slightly. The tip is acutely rounded. 
The surface of the egg is finely but irregularly hexagonally reticulate, 
appearing punctate under low power. Surface is rough. Color is 
cream, at first light, darkening with age. Micropylar spot near fila- 
ments as shown in drawing. Clear, smooth and amber colored. The 
central spot very dark. This spot can be seen to be reticulate under © 
certain lighting as can also the white part of the filaments. Here the © 
reticulation is very fine. ; 
First Instar. 
“Form in a general way resembles the adult. It is, however, broader 
in proportion to length. The head, including the eyes, is broader than 
long, excluding the rostrum. Each eye is less than one-third the width 
of the head, round and projecting beyond the thoracic margins. The 
thorax is a little under one-third the total length of the bug. It shows 
the three rings. , 
“The rostrum is four-jointed, stout, the first joint stoutest, about — 
twice as long as the second, and subequal to the third and fourth. The © 
fourth or terminal joint is furnished with tactile hairs, as in the adult, 
the antennz are short, club-shaped, one-jointed, the extremity nearly as 
broad as the length, situated near the basal joint of the rostrum. The ~ 
thorax is a little under one-third the total length of the bug, and shows ~ 
the three rings. The bifid air-tube is absent, its place being taken by 
the blunt extension of the terminal abdominal segment, as described in 
connection with the respiratory system. The legs are comparatively 
stout, the second and third pairs being nearly as long as the entire bug. — 
The tarsi of the first pair are one-jointed and entirely destitute of claws; — 
those of the second and third pair are also one-jointed, armed with long 
claws. The tibize of these two pairs are armed with a comb-like row of 
stout spines going partly around at the distal end, at the tarsal joint, 
and are furnished with a few coarse hairs at this end also. The first — 
pair of pedes is the counterpart of those of the adult, except that they 
are much broader in proportion, and do not show the blunt, so-called 
apical tooth in the femur. 
“Size: Long., 8 mm.; lat., 1 mm. at thorax; air-tube long., 1.5 mm. 
“Color: Brownish of varying shades, including the legs, which are 
banded with lighter rings. The eyes are black or dark brown. a 
“Markings: None sufficiently definite to be called such. There is 
a lighter median line in the thorax.” 
