-~I 
oN) 
Tetranychus modestus n. sp. 
Head, palpi, and legs are brownish, the body yellowish, with quite 
large blackish irregular spots across middle of thorax, a large lateral 
spot in region of last pair of legs, and a broad irregular border around 
end of body. Body rather more elongate than usual; bristles in the 
usual arrangement; legs short; femur I fully twice as long as broad; 
tibia I only a trifle longer than patella I; tarsus short, ends in a long, 
simple claw, curved only toward tip, in all respects like that of 7: 
bicolor. Mandibular plate of moderate length, not much narrowed 
toward tip, which is broadly rounded. Palpi short, thumb not as long 
as claw, with three nearly equal fingers on the tip; there is no plate or 
lamella. On each side of the anal opening there is a pair of fine hairs. 
Found in August at Washington, D. C., causing a rust-like appear- 
ance on the blades of corn. Closaly allied to the preceding, but 
distinct by characters of palpi. 
Tetranychus tumidus n. sp. 
Dark red and somewhat pruinose, marked across the thorax with a 
dusky band, terminating each side in a rather large dusky spot, a 
similar spot on each side near end of body; in some 
specimens there is an additional spot each side between 
the two; legs and mouth parts pale reddish. Young 
specimens are paler, with spots more distinct and con- 
fluent. Eggs are pale red. Body moderately broad; 
bristles rather longer than usual, quite stout, all in the ye, 9 Tetrany- 
usual arrangement, subfrontal pair not twice as long = ¢hus tumidus: 
as the frontal pair. Palpi of average length, thumb is rae hee 
short and stout, on its tip is a large short cylindrical 
finger whose base is not much smaller than the tip of thumb, at the 
inner upper corner is a short hair, and on the upper side near base 
is a slender finger. Mandibular plate about twice as long as broad, 
narrowed toward tip, the sides before tip slightly concave, broadly 
rounded at tip, with a small yet distinct emargination in the middle. 
Legs moderate; femur I fully twice as long as broad; tibia I plainly 
longer than patella; tarsus of moderate length, terminating in a claw 
which is strongly bent near middle and four-cleft beyond. 
Collected at Eustis, Fla., on the leaves of water-hyacinth, by H. J. 
Webber. It is closely allied to 7. b¢maculatus Hary., but distinguished 
by the very large finger on the tip of thumb. 
Tetranychus bimaculatus Harvey. 
Tetranychus bimaculatus Harvey.—Ann. Rept. Me. Agric. Exp. Sta. f. 1892 (1893), 
joe spy JeaR Del 
There are several styles of coloration, one is pale greenish yellow, 
with a large group of blackish dots each side on base of abdomen, 
sometimes a median group of dots; another style is dark crimson red, 
with black spots along each side of the body; legs, and hairs pale red- 
