Ewing — New North American Acarina. 59 
Abdomen three-fifths as broad as long, broadly rounded behind; pos- 
terior group of legs situated about the middle. 
Anterior pair of legs about a third longer than the body; tarsus 
slightly swollen and subequal to the tibia; tibia shorter than the ante- 
penultimate segment. Second and third pair of legs subequal; last 
pair of legs extending about two-thirds their length beyond the posterior 
end of the body; tarsus of leg IV swollen, about one-half as long as the 
tibia; tibia thickly clothed with a row of subequal bristles resembling 
a comb; tibia and antepenultimate segment subequal. 
Length, 0.90 mm.; breadth, 0.60 mm. 
Ona maple log. Collected by J. D. Hood at Urbana, IIl. 
Described from two well-preserved specimens. 
-Rhyncholophus quadrioculus N. sp. 
Pl. VIII. f. 8-9. 
Extremely variable in color, many of the smaller specimens light yel- 
low or greenish, while most of the larger ones are red. In some of the 
larger specimens, the anterior legs, the tarsi of the second and the third 
pairs and the four distal segments of the last pair of legs are red, the 
remaining segments of the last three pairs of legs being almost colorless. 
Palpi extending to about the middle of the third segment of the 
anterior pair of legs; palpal claw slender, curved downward; thumb 
small and slender, not extending to the tip of the palpal claw; second 
segment of palpus longer and broader than the third. Mandibles less 
than one-half as long as the palpi. Dorsal groove short, scarcely extend- 
ing to the level of the eyes, expanded behind where is situated a pair 
of long bristles equal to the dorsal groove in length; anterior tubercle 
bearing six long subequal bristles. Two pairs of eyes present; situated 
laterally, the more lateral pair being much the smaller. 
Body oval; two-thirds as broad as long, uniformly rounded behind. 
Anterior pair of legs longer than the body; tarsus slightly swollen 
and two-thirds as long as the tibia; tibia subequal in length but nar- 
rower than its preceding segment. Second and third pairs of legs 
shorter than the rest, the second pair being the shortest. Hind pair 
of legs equal to the body in length; tarsus swollen, one-half as long as 
the tibia; tibia longer and narrower than its preceding segment. 
Length, 0.86 mm.; breadth, 0.50 mm. 
In grass. Very abundant in the vicinity of Arcola, IIl., 
during the autumn months. Described from many 
specimens. f 
Rhyncholophus brevitarsus n. sp. 
Pl. IX. f. 10-11. 
Color variable; body usually almost black; legs red, the second and 
third pairs usually lighter. 
Palpi about one-third as long as the anterior pair of legs; palpal claw 
strongly curved inward; thumb one-third as broad as long, not swollen 
and not extending to the tip of the palpal claw; penultimate segment 
