312 
I find from an examination of a large series of specimens of lineata 
that the armature particularly of the lateral protuberances is subject 
to some variation, and have shown in the accompanying diagram (Fig. 
47) the maximum armature; but the chief characters distinguishing the 
larve, namely, the stigmata and particularly the armature of seg- 
ments 9, 10 and 11, are constant in lineata at least, and also in the few 
larve of bovis which I have had opportunity of examining. 
DESCRIPTIVE DETAILS. 
THE EGG.—The egg, including the pedicel or clasping base, is 1 mm. 
long and 0.02 mm. wide at the greatest diameter. In color itis dull 
smooth and shining. As may be seen 
by the illustrations (Fig. 44 a, d), the 
egg consists of two distinct parts, viz, 
the egg proper and the clasping base 
which firmly secures it to the hair and 
connects with the egg proper by a thin 
but rather wide pedicel. This base is 
made up of two lips or valves, which 
close over the hair and thus give a 
very secure attachment. The egg is 
narrow, ovoid, broadest at its middle 
and larger at the base than at the tip, 
which is more or less abruptly and ob- 
hiquely truneate. (Fig. 44.) 
Fic. 47._HypopeRMa TiNEaTa— diagram of THE LARVA: First stage.—This stage 
maximum armature (original). (Fig. 44 Bye when ready to leave the 
egg, or when first hatched, is 0.08 mm. long by 0.02 mm. in width, 
tapering above. Within the egg it just fills the cavity, and may be 
seen through the shell and quite readily removed. It is dull white in 
color, with the surface from the second to the twelfth joints distinctly 
and densely spinous. The armed area occupies the entire surface of 
these joints, except a narrow lateral free space. The arrangement of 
the spines on these joints, except the last, is uniform, with perhaps a 
slight increase in the size of the spines from the second to the eleventh 
joint. The armature of these joints and of the anterior half of the 
twelfth consists of a rather prominent and posteriorly directed row on 
the anterior margin of each joint, followed by numerous smaller prickles 
which decrease in size and abundance towards the posterior margin of 
the joint. The posterior half of the terminal joint is armed with very 
much larger and slightly curved prickles or spines, which point poste- 
riorly on one side and anteriorly on the other. (See Fig. 44h.) The anal 
spiracles are represented by dark circular spots, and terminate in two 
prominent spines. The anterior spiracles appear as two minute eleva- 
tions, and the mouth-parts consist of two dark-brown crescent-shaped 
yellowish white, and the surface is 
oe ere 
