42 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 94 



distally. The gonytheca is rather broad and extends half way down 

 the ventral side as a distinct groove. This groove bears an irregular 

 row of short setae. The anterior surface is clothed with moderately 

 long setae, rather more sparse at the base and longer around the apex. 

 These are also more densely placed ventrad along the edge of the 

 ventral groove. The posterior surface (fig. 81) bears a few small 

 setae along the border of the ventral groove, and near the apex a few 

 which are continued around from the anterior side. There is also a 

 series of longer close-set setae along the distal truncated margin, 

 which is continued onto the dorsal margin also. This posterior surface 

 is also very minutely longitudinally striate. 



The tibia (fig. 81, tb) is rather slender, cylindrical, and somewhat 

 regularly expanded distad. Its apex bears a complete circle of large 

 setae very similar to those on the prothoracic tibia (figs. 8 D, E) but 

 the calcaria are much larger and more conspicuous. The anterior vesti- 

 ture is rather dense and the setae long. It is much denser toward 

 the apex and the dorsum. The large thick setae aj-e scattered irregu- 

 larly over the surface, there being perhaps lo or 12 present. The 

 posterior surface (fig. 8 I) is more sparsely clothed and lacks entirely 

 the larger setae except in the apical series. There is a dorsal series of 

 four or five of the larger setae. The calcaria are unequal in length, 

 the posterior being much the longer, and nearly as long as the first 

 tarsomere. Their surface has an irregular scaly appearance. 



The tarsus of the metathoracic leg (fig. 81, tar) is nearly as long 

 as the tibia, five-segmented like the others, and very nearly cylindrical. 

 The first tarsomere is elongate, nearly as long as the next three to- 

 gether, the latter decreasing in length slightly among themselves 

 distally. The fifth tarsomere is somewhat shorter than the first and 

 bears two claws and the empodium, which are very similar to those 

 of the prothoracic leg (fig. 8B). Each of the first four tarsomeres 

 is a little more extended ventrad than dorsad and therefore is in- 

 serted apparently a trifle more on the dorsal aspect. They are rather 

 densely clothed with small setae except for the base of the distal four, 

 and the surface of the first is roughly sculptured. The apex of each 

 tarsomere, particularly ventrally, bears a number of very long setae 

 which often reach to the apex of the succeeding tarsomere. The last 

 one is more sparsely clothed with the longer setae and bears the two 

 long setae on the empodial end of the unguitractor plate. 



THE ABDOMEN 



The abdomen (fig. 9 A) or third region of the body is composed 

 of a series of 10 segments, of which the last two form the genitalia. 



