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, 

 Jies 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 



B 



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 flnva, male, last two segment's 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 tibial spurs, and these 



