30(> PROCEEDINGS OF THE NATIONAL MUSEUM. vol. xxxi. 



Legs. — The legs are long but not very stout, the coxae, trochanters, 

 and femora unarmed with spines, but generally more or less hairy 

 and frequently sericeous, sometimes even pubescent. The tibiae are 

 provided with spines on the sides and at the ends; the metatarsus is 

 similarl}' armed and the other tarsal segments are spiny beneath and 

 at their tips, but not above. 



The fore coxfe are large and their basal articulations with the 

 body are close together. Each is conical or subconical in form, the 

 trochanter articulating at the apex. The trochanter is well developed, 

 larger distallv, and at its outer end joins the femur, which is smaller at 

 this articulation than elsewhere. The fore femur is the shortest of 

 the femora, but is quite stout and frequently bears a row of well- 

 developed hairs along its under surface. The fore tibia is the onl\" 

 tibial segment of either of the legs, which is much shorter than the 

 femur. It enlarges gradually toward its tip and bears rather short, 

 stout spines on its sides, which sometimes show a partial arrangement 

 in longitudinal rows. At the tip of the tibia are several spines, two 

 of which are larger than the others, l^esides a long, curved, much 

 moditied spine bearing line hairs on its inner surface, which, in con- 

 nection with a corresponding modification at the base of the first tarsal 

 segment (metatarsus), acts as a cleaning apparatus. (Plate IX, fig. 21.) 



There are five tarsal segments: The first is much longer than the 

 next three, and considerabh" longer than the fifth, and is called the 

 metatarsus. This segment, in addition to short, irregularl}" distributed 

 spines, has a row of them on the inner side and a similar one on the 

 outer side. In the females a second row of much longer ones, called 

 a "tarsal comb," is also present on the outer side of the metatarsus, the 

 spines of the two rows alternating more or less regularly with each 

 other except at the distal end of the segment, where two or three of 

 the longer set are usually the only ones present. This row of long- 

 spines appears to be utilized in digging the holes in which the eggs of 

 the insects and the food are placed, hence is absent in the males and in 

 the subgenus hodontia., which makes use of cavities in stems of plants 

 and similar places as its ])reeding places. (Plate X, fig. 27.) 



At the tip of the last tarsal segment is a pair of well-developed, 

 curved claws, between which is a large pulvillus. On the inner 

 (under) side of the claw, between its base and the middle, are from one 

 to five or even six teeth. These may be pointed or blunt, well-devel- 

 oped or more or less rudimentary, and their number is useful in con- 

 nection with other characters in determining the subgenera. 



The middle coxte are somewhat more widely separated at their 

 articulations with the body than the fore coxre. The femora and 

 tibiae are of nearly equal length, the latter being a ver}^ little the 

 shorter. Aside from these difterences and the absence of a cleaning 

 apparatus at the tip of the tibia the mesothoracic legs difi'er little from 

 those of the prothorax. 



