97 
Beneath, colored as above; beak long and slender, reaching 
middle of abdomen in adult, base and apical joint pale brown, 
the latter tipped with black, as thick as joint II of the antennae, 
and as long as antennal joints I and II combined; penultimate 
joint half as long, and one half wider than its length; apparent 
basal joint about twice as long as the apical two combined, pale 
and slender. Legs moderately long, each with two distinct claws 
and two tarsal joints; coxae slightly darker. Seventh ventral seg¬ 
ment often dark, eighth concealed at middle, anal plate beneath 
with color and surface as above. Spiracles pale brownish, very 
inconspicuous. No glands or tubercles seen. 
Length of body 2.1 mm., greatest width 1mm., antennae .75 mm. 
The young are similar to the adult, antenna) five-jointed, III 
a little shorter than in the adult. 
Described from six lots of specimens. 
The clear pale green color, greatly elongated third antennal 
joint, very large sensoria, and absence of cornicles, easily dis¬ 
tinguish this species from other root lice. 
Tychea brevicornis, n. sp. 
(Plate IX., Fig. 4.) 
This species of root louse is not important, and has not been 
known to occur in destructive numbers, but from its occasional 
presence on corn roots, it deserves mention along with others 
of its group and habits. 
A colony of this Tychea was found on corn roots at Normal, 
Ill., on the 28th of July. The specimens in this collection all ap¬ 
pear to be young pseudogynes, or wingless viviparous females, 
from about one third to two thirds grown. A large adult wing¬ 
less viviparous female was taken on the 25th of October from 
an ants’ nest in a pasture field near Champaign. 
Description.* 
Wingless Viviparous Female .—Body broad-oval, pale dirty 
whitish in alcoholic specimens, smooth, sutures not distinct. 
Head short, rather narrow between antennae, but very broad 
at base, which is more than three times as long as the frontal 
margin, the union between head and prothorax being very close; 
lateral margins concave, a pale dusky brown patch occupying 
the anterior surface between the antennae, terminating behind with 
a semicircular irregular margin, notextending towards the acute 
lateral angles nor attaining the hind margin. It is divided by a 
median whitish line, on each side of which is a white glandular 
dot. An angular brownish patch also surrounds each eye. An¬ 
tennae short, but rather slender, hardly surpassing the posterior 
* By C. A. Hart. 
-7 E. 
