85 - 
Tlead rather broad and subtruncate in front, width at base about 
twice its length. Antenne distant, each in a short broad eroove or im- 
pression, five-jointed in the mature individual, moderately long and 
slender, attaining the sides of the metathorax, slightly di ker than the 
body, fifth joint ‘and apex of fourth pale brownish; joint IL about twice 
as thick as ILI, its posterior side about equaling its basal diameter; [] 
a little longer and more slender, about twice as long as thick; IIL the 
most slender and much the longest joint, being nearly twice as long as | 
and II combined; IV and V about equal, each longer than Il, and 
combined about three fourths as long as ILI, spur of \ tapering, short, 
extending beyond the sensorium about as far as the diameter of V at 
base. On the lower side of the apex of LV is a large round sensorium, 
and at the base of the spur of V is an extremely large one, semicircular 
or sublunate, fully as wide as the diameter of III, strongly convex, 
glassy and apparently transparent when looked nia. in profile. ‘Two 
or three minute sensoria adjoin it on the distal side, next the spur. On 
one antenna there is an additional sensorium on IV towards the base. 
HKyes moderately large, placed near the poste rior angle of the head, ocular 
tubercle broad and rather high, showing in alcoholic specimens three oval 
lenses, their long axes radiating from the apex of the tubercle. 
Prothorax set off from remainder of body by a slight constriction 
or deepening of the suture, and usually showing an oblique ‘mpression 
on each side above. Remaining body segments without distinet mark- 
ings or structures above, gradually shorter to posterior extremity. Highth 
segment, cauda, and anal plate pale brownish, the former small and 
short, the cauda reduced to a subtriangular plate on the upper surface of 
the anal plate, the latter one half longer than the cauda and as long 
as the seventh segment, semiglobular, minutely scabrous, clothed with 
fine short hair, a white line adjoining the apical margin of the cauda. 
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 I] of the antenne, and as long as antennal 
joints I and Il 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 distinet claws and two tarsal joints; coxe slightly darker. Seventh 
ventral segment 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 1 mm., antennx .75 mm. 
The young are similar to the adult, antenne five-jointed, IIT 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 distinguish this 
species from other root lice. 
