212 Annals Entomological Society of America [Vol. XIII, 



surface. (Fig- 36E). The tarsal joints are movable, being 

 rather on the order of a ball and socket joint, the attachment 

 between the first two allowing only limited movement (Fig. 

 36D), and one like that between the fourth and fifth allowing 

 extreme freedom (Fig. 36F). 



The mesothoracic legs (Fig. SOB) are the longest of the legs. 

 The coxa (Fig. 20) is roughly diamond-shaped and flattened in 

 a dorsal view, but as viewed anteriorly it consists of two halves. 

 The dorsal half has four or five stout bristles on the dorsal 

 margin of the anterior surface. The trochanter is roughly tri- 

 angular with a coronet of hairs near the apex (Fig. 23A and B). 

 The femur (Fig. 27) is long, tapering slightly at either end. 

 There are eight strong bristles on the anterior surface, while 

 the rest of the femur is covered with fine short hairs, except at 

 the apex where there are two bristles. The tibia (Fig. 26) is 

 slender, enlarging at its distal end. It is armed with two or 

 three stout spines on its anterior surface, a pre-apical bristle 

 and an apical spur. 



The metathoracic legs (Fig. 30C) are of medium length in 

 the male and as long as the mesothoracic legs in the female. 

 The coxa (Fig. 19) is an irregular-shaped piece with one small, 

 stout bristle on the dorsal surface and a row of small bristles on 

 the distal margin. (Fig. 19B). The trochanter (Fig. 22) is 

 somewhat irregular with a strong bristle on its ventral surface. 

 The femur (Fig. 25) enlarges suddenly at the base and tapers 

 slightly at its distal end. Starting at the base, at the dorsal 

 angle, there is a row of stout bristles which curves irregularly 

 on the anterior surface, ending near the apex. There is a row 

 of five fairly stout bristles on the ventral surface. The tibia 

 tapers slightly at the base and besides three strong bristles on 

 the dorsal surface and two on the anterior and ventral surfaces, 

 each, it is armed with a pre-apical bristle and an apical spur. 

 All parts of the legs with the exception of the coxas and tro- 

 chanters are covered with rather coarse pubescence, or fine 

 hairs arranged in more or less regular rows. 



THE ABDOMEN. 



When viewed dorsally, the abdomen appears to be composed 

 of but four segments in the female and five in the male. There 

 is, however, an imperfect suture which separates the first and 

 second segments dorsally, and a plate which indicates the first 

 segment as being distinct from the second ventrally. 



