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 the bark of both the sycamore and the soft 
maple. Collected by J. D. Hood at Lyons and Urbana, IIL, 
and by C. A. Hart at Muncie, III. 
Uropoda folsomi N. sp. 
Pl. XT. 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 coxe of legs II to about midway between the coxe 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 coxe 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, Ill. Described from one male and two females. 
Uropoda illinoiensis nN. Sp. 
Fg Ae, OF AM aa Be 
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 coxe of the second pair of legs 
to even with the posterior edge of the coxe 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; 
