OF WASHINGTON. 
141 
remote from front pairs; i and ii rather longer than the others; each 
with a few long bristles, mostly toward tip; tarsi ending in three forked 
claws; tarsi i and ii with a short clavate hair above near tip. 
Length .28 mm. 
Occurs in enormous numbers in the deformed heads of 
certain grasses (Spirobolus) in New Mexico and Utah, and 
doubtless elsewhere in the West. 
Phyllocoptes cornutus n. sp. 
Color reddish. Body broad, scarcely two and one-half times as long 
as broad at base of abdomen, moderately convex. Cephalothorax appar- 
ently smooth, produced forward in a broad, median plate, with an acumi- 
nate point; this plate when seen in side view looks like a frontal horn. 
FIG- 17. Phyllocoptes cornutus, and leg i enlarged. 
Near the posterior margin of cephalothorax there is a sub-median pair 
of bristles, not one-half as long as the cephalothorax. Abdomen with 
about 32 dorsal rings, and fully twice as many ventral ones. Terminal 
bristles about one-fourth as long as body; three pairs of ventral bristles; 
one near tip, one before, and one behind middle, first pair longest; also 
a long pair from coxae ii. Legs as usual; the long tarsal bristle arises 
near the base of that joint, but not at extreme base. 
Length .13 mm. 
On leaves of peach, Washington, D. C. This species lives 
free on either surface of peach leaves in various parts of the 
Eastern States. When in numbers it produces a sort of 
silvery sheen upon the leaf, readily discernible when the light 
is shining upon it. 
Cecidobia n. gen. 
An Eriophyid. Dorsal abdominal rings numerous and deeply cut; 
ventral segmentation almost obliterated; cephalothorax pointed in front, 
and from the lower median surface there extends downward a curved, 
black, stiff, rod-like bristle; tarsi ending in a stiff branched hair. Venter 
with four pairs of bristles, besides longer apical bristles. 
Type: C. salicicola n. sp. 
