70 Trans. Acad. Sci. of St. Louis. 



with hairs; tibia very slightly longer than the genual; genual about 

 one-half as long as the femur. Second and third pair of legs shorter 

 than the others. Tarsus of leg IV about three times as long as the tibia. 

 The tarsi of the different legs have caruncles, whose pedicels increase 

 in length as you go from the anterior to the posterior legs; claws of 

 caruncles weak. Legs with very few hairs. 

 Length, 0.54 mm.; breadth, 0.30 mm. 



Found under tha bark of both the sycamore and the soft 

 maple. Collected by J. D. Hood at Lyons and Urbana, III, 

 and by C. A. Hart at Muncie, 111. 



Uropoda lolsomi n. sp. 



PL XI. f. 30. 



Chestnut brown; anterior part of the body lighter than the rest. 



Palpi scarcely extending beyond the anterior margin of the dorsum 

 of the body and clothed with rather prominent hairs. 



Body much longer than broad, somewhat pointed at each end and 

 sparsely clothed with short hairs including a row around the margin 

 of the body which is longer than the rest. Epigynium of the female 

 almost twice as long as broad, broadest at the middle, extending from 

 the level of the coxae of legs II to about midway between the coxse of 

 legs III and legs IV. Genital opening of male oval, with the long 

 diameter in the line of the median plane, situated between the coxse of 

 the third pair of legs. 



First pair of legs about one-third as long as the body; tarsus one and 

 a half times as long as the tibia and genual combined, possessing a long 

 slender caruncle and a long tactile bristle at its distal end. Second 

 pair of legs slightly the stoutest; third pair not extending to the pos- 

 terior end of the body. All the legs bear a few short, stout, sharp spines. 



Length, 1.04 mm.; breadth, 0.64 mm. 



Habitat not known. Collected by J. W. Folsom at 

 Urbana, 111. Described from one male and tv/o fem^ales. 



Uropoda illinoiensis n. sp. 



PL XI. f. 31. 



Chestnut brown; integument smooth. 



Mouth parts of moderate size; palpi one-third as long as the anterior 

 pair of legs; sparsely clothed with hairs. 



Body subdiscoidal, almost as broad as long; sparsely clothed with 

 very small hairs, with a small pair of hairs at the tip of the anterior 

 margin. Epigynium of the female long and narrow, twice as long as 

 broad and extending from between the coxse of the second pair of legs 

 to even with the posterior edge of the coxse of the last pair of legs. Geni- 

 tal opening of the male a little posterior to the level of the third pair of 

 legs; sternum of the male somewhat pitted with large shallow pits. 



Anterior pair of legs about one-third as long as the body; tarsus of 

 leg I equal to the genual and tibia combined and clothed with moderate 

 hairs; tibia and genual subequal in length but the genual is the stouter; 



