HENRY J. FRANKLIN. 229 



are only indicated by the folds in the membrane of the wing. 

 There is a deep and sharp indentation in the hind margin of 

 the wing, called in this paper, the sinus. A fold connects 

 this indentation with the end of the anal vein and divides the 

 open anal cell or lobe from the second discoidal cell. 



Legs. — The legs are moderately long and stout. The front 

 pair are the smallest and the hind pair the largest. The 

 coxae, trochanters and femora are not armed with spines, 

 but they all bear more or less pile. The fore and middle 

 tibiae of the female usually have very slender spines on their 

 outer sides and on their distal ends, but in the males these 

 spines are largely replaced by hairs. All the tibiae bear con- 

 siderable long hair. All of the five tarsal segments are more 

 or less spiny. The basal one is much longer and larger than 

 any of the others and is known as the metatarsus. This seg- 

 ment is densely spinose with slender spines over most of its 

 inner face and along its front margin. It also has numerous 

 spines on its distal end. All the metatarsi of the females 

 are usually considerably spiny on their outer faces, but in the 

 males these spines are largely replaced by hairs. The spines 

 on the other tarsal segments are almost entirely confined to 

 their distal ends and their lower sides. 



The fore coxae have their insertions between the poste- 

 rior end of the prosternum and pro-episternum in front and 

 the extension of the pronotum behind. They are flattened, 

 triangular pieces and are somewhat convex, coarsely punc- 

 tate, and hairy in front. Behind they are smoother and 

 with but little hair. Their outer sides are excavated longi- 

 tudinally for the reception of the trochanter and the base of 

 the femur when these are drawn upward. The trochanter is 

 well developed and grows gradually wider and becomes flat- 

 tened from its base to its distal end where it joins the base 

 of the femur with a slanting joint. It is very hairy on its 

 lower side. The front femur is largest at its proximal and 

 smallest at its distal end. It is very hairy on its lower side. 

 The fore tibia is the only tibial segment of all the legs which 

 is much shorter than the femur. It enlarges gradually from 

 base to apex and, in the females, bears numerous spines on 



TRANS. AM. ENT. SOC, XXXVIII. 



