382 



Journal of Agricultural Research 



Vol. X, No. 8 



The whole dorsal surface of the female shows the head and a number 

 of shields which possess hairs. The shields are so grown together that 

 they are hardly visible in glycerin and overlap each other. On the 

 ventral side one does not see any trace of a skin; it has totally hard- 

 ened. The female measures 240 to 260 /i in length and 130 to 140 /x in 

 width. 



THE ADULT male; 



The general appearance of the adult male (fig. 6) is more hyalin, and 

 the body is more angular oval than that of the female. The capitulum 



is moderately large, tending down- 

 ward, rounded in front, with one 

 pair of quite long frontal bristles. 

 The capitulum and sexual organs, 

 that terminate the body in front and 

 behind, respectively, are almost 

 identical in form and size, being 

 ovate and sightly excavated at the 

 base and terminally rounded. 



The cephalothorax is as broad as 

 long. The epimera of the first pair 

 of legs are united at the median 

 line, the same being true of the 

 epimera of the second pair. The 

 median line touches the two trans- 

 verse lines, which no doubt termi- 

 nate the cephalothorax. The dorsal 

 part of the cephalothorax is pro- 

 vided with two pairs of bristles, one 

 pair, exceedingly long, called the 

 "tactile bristles." 



The abdomen is larger and broader 

 than the cephalothorax. The an- 

 terior group of legs are subequal and sparsely clothed with moderately 

 long bristles. The first pair terminates in a single claw, while the second 

 and third pair are two-clawed. The anterior group of legs are provided 

 with a clavate hair on the first segment. The third pair of legs are similar 

 but slightly longer than the second pair, and are devoid of the clavate 

 hair. The fourth pair of legs is very stout, twice the thickness of the 

 third pair. The first joint is broader than long; the second is rather 

 more than twice as long as broad, and is furnished on the inner face 

 with a broad curved expansion and with a stout terminally inclined 

 tactile bristle and a lateral hair near the middle. The next joint pos- 

 sesses inwardly two divergent spines which are short ; laterally and term- 

 inally inclined is a long touch bristle which grows finer toward the end. 

 It also possesses a short clavate hair which stands rather upward and is 



Fig. 6. — Tarsonemus pallidus: Adult male, 

 enlarged. (Original.) 



Much 



