FLEAS. 129 
Lipeurus numide Denny. 
This livid-yellow louse is said to occur on the guinea- 
fowl. 
Lipeurus polytrapezius Nitzsch. 
_ The peculiar species is common wherever turkeys are 
kept, and is easily detected, being large enough to be readily 
seen, measuring from 3.0 to 3.5mm. in length. It has avery 
elongated, flat, and pointed body, which is pale-yellowish, 
_ with a dark margin. Allthe segments of the abdomen, with 
the exception of the last, have a grayish-brown trapezoidal 
spot on each side, whence the scientific name. This very 
active insect prefers the wing-feathers. 
Menopon phestomum Nitzsch. 
This parasite infests the peacock, and seems to be very 
common. It is illustrated in fig. 108. 
Menopon numide G. 
This insect is found on guinea-fowls. 
H. FLEAS. 
(Siphonaptera Pulicide). 
These insects possess a laterally compressed body; the 
thoracic segments are well separated; wings are missing but 
represented by two pairs of short and stiff scales, that have 
no or very little power of motion; feelers are very short, 
composed of three flat and singularly lobed joints, which are 
in most species closely folded away in a cavity behind the 
eyes, while in some others they are exposed and erect. The 
peculiar sucking mouth (fig. 109) is well adapted for piercing 
the skin. The mandibles and labium form three slen- 
der lancets; the blood is drawn up through the channels 
or spaces between them and the labial palpi and lower lip, 
by means of a sucking stomach. The large posterior legs 
are very powerful, enabling the fleas to leap with remark- 
able agility enormous distances compared to their size. The 
head is small; the eyes are simple, and in some cases very 
minute. The white and worm-like larve are long and 
