Ewing — New North American Acarina. 57 
Rhyncholophus pollicaris n. sp. 
Pl. VIII. f. 4. 
Pale, yellowish pink. Body clothed with stout, simple spines. 
Palpi as long as the first two segments of leg I; thumb greatly swollen, 
surpassing the palpal claw and well clothed with almost straight hairs; 
claw rather sharply curved downward; third segment of the palpus 
about one-half as long as the second. Dorsal groove extending about 
one-third its length beyond the eyes, swollen at its posterior end. A 
single pair of eyes present, situated at the level of the second pair of 
legs and about half way between the dorsal groove and the lateral 
margin. 
Body small, about three-fifths as broad as long, broadly rounded 
behind. Posterior group of legs situated at about the middle of the 
abdomen. 
All the legs very long, being much longer than the body. Anterior 
pair twice as long as the body; tarsus of leg I slightly swollen, about 
one-half as long as the tibia; tibia slightly longer than the preceding 
segment. Second pair of legs two-thirds as long as the anterior pair; 
third pair almost as long as the first pair. Last pair of legs the longest, 
being about two and a half times as long as the body; tarsus of leg IV 
very slightly swollen, less than one-third as long as the tibia; tibia and 
its preceding segment subequal. 
Length, 0.90 mm.; breadth, 0.50 mm. 
Found upon the bark of wild cherry. Collected by the 
writer at Urbana, III. 
This species is remarkable for the great size of the 
palpal thumb and the length of the legs. 
Rhyncholophus parvisetosus nN. sp. 
Fs VIF. G: 
Body black; legs and mouth parts red; integument very finely and 
uniformly striated. Body very sparsely clothed with minute, scale-like 
setae (hence the name parvisetosus). 
Palpi not as long as the first two segments of the anterior legs; palpal 
claw large, stout and possessing a row of four sharp teeth on its inner 
ventral aspect; thumb large, clavate, slightly surpassing the claw and 
well clothed with bristles. Dorsal groove extending into the anterior 
tubercle of the cephalothorax, which bears a whorl of ten long, stout, 
straight, slightly pectinate bristles. 
Body subpyriform, the broadest part being between the Kababiad and 
posterior groups of legs; uniformly rounded posteriorly. 
Anterior pair of legs about one-third as long again as the body; tarsus 
of leg I three-fourths as long as the tibia, slightly swollen; tibia sub- 
equal to its preceding segment. Second and third pair of legs shorter 
than the first pair and subequal. Last pair of legs much the longest, 
being about twice as long as the body; tarsus of leg IV not swollen, 
about two-fifths as long as the tibia; tibia about one and a half times 
