PARASITOLOGY. 37 
hairs are noted on each side of its piercing stylet. 
Two protuberances are noted just posterior to the 
attachment of the antennae, forming deep notches. 
The legs are marked by dark bands at the joint. 
The terminal end of the last segment is provided 
with one large and one small claw, and between 
them is found a disk that is provided with small 
Fig. 7—HEMATOPINUS SuIS. Photomicrograph, 1x24 inch 
a, Head with piercing stylet. 
, Antennae—5 segments. 
, Deep notch in which the eyes are implanted 
, Claws on end of terminal segment. 
, Abdomen. 
f, Thorax, bearing 3 pair of legs. 
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spikelets, thus giving it a great power to hold on. 
It is about one-fifth of an inch long. 
While this louse is found on all parts of the body, 
a favorite place is in the folds of skin just back of 
the ears, where the nits or eggs may be founda in 
abundance. 
