THe CRANE-FLIES oF NEw YorK— Part I 859 
and others) they are very large and powerful. The coxae are often pro- 
vided with a dense covering of long silky hairs. 
The trochanter.— The second segment of the leg, called the trochanter, 
lies between the coxa and the femur and serves as a pivot between these 
two major segments. In Dicranoptycha, the distal margin is armed with 
a sharp blackened tooth which is directed inward. 
The femur.— The femur is the third segment of the leg, corresponding 
to the thigh of higher animals. It is the largest and most powerful 
single element of the leg, being in many cases greatly elongated and 
Fig. 127. FEET OF CRANE-FLIES 
A, Limnobia indigena, male, last tarsal segment and claw. B, Dicranomyia morioides, 
male, last tarsal segment and claw. C, Rhabdomastix flava, male, last two segments and 
claw 
incrassated. In some groups (as Ctenacroscelis, for example) it bears 
a comb of approximated spines near the distal end. In other genera, 
especially in Trentepohlia, the femur is often armed with groups or 
rows of stiff bristles or short spines, which furnish valuable specific 
characters. 
The tibia.— The tibia is the fourth segment of the leg, situated between 
the femur and the first (metatarsal) segment of the tarsus. Next to the 
femur it is the longest single element of the leg. In many groups a pair 
of spines, or spurs, are borne at the tip, called the tbzal spurs, and these 
