Sept, i, 2991 Solenopotes capillatus, a Sticking Louse of Cattle 
801 
imm 
Abdomen. —In first instar very elongate, not wider than thorax; in later instar 
markedly broader, a shallow submarginal groove on each side running from first 
segment to about the seventh, where they join. Along the line of this groove on each 
side is a row of depressions, one near the anterior border of each segment. Spines 
about as in adult female though hairs are very 
short except on the sides of seventh and eighth 
segments on which they extend well beyond 
the tip of the abdomen. Apex of abdomen 
slightly bilobed, spiracles projecting distinct¬ 
ly on the third to eighth segments, in¬ 
clusive. 
THE EGG 
Color pale yellowish. Elongate oval, the 
side next to the hair upon which attached 
practically straight, the other side curved, 
set at a comparatively small angle from the 
hair and cemented to it by a basal, somewhat 
heart-shaped, broad and comparatively short 
attachment (fig. 6). Length of egg, not 
including attachment, 735 /*, greatest width 
2 78 fx at right angles to a plane passing through 
the egg and hair to which it is attached, the 
other diameter being about 244 pi. The well- 
defined, somewhat elevated operculum set 
almost at right angles to the straight side of 
the egg; diameter about 190 fi\ its height 
about one-third of its diameter; length of 
attachment clamp about 190 n, its greatest 
width about 180 n. Surface of egg minutely 
reticulated, under moderate magnification 
giving a granular appearance. Operculum 
with a number of slight protuberances which give it a deeply roughened appearance. 
A number of eggs are frequently attached to a single hair and may 
be found anywhere from the base to the tip of the hair. 
A 
Fig. 6 . —Solenopotes capillatus: A, Egg attached 
to hair, X 40 ; B, operculum of egg, greatly 
enlarged. 
