June, 1902.] New Phenacoccus on Platanus Occidental is. 
285 
Color : Head, dark reddish-brown ; eyes, blackish ; thorax, reddish-brown 
except dark, ehitinous parts ; abdomen light-brown tinged with yellow. An- 
tennae, reddish-brown ; legs, brown to olivaceous with dark-brown tarsi. 
Caudal filaments, white ; wings, semi-transparent with iridescent rose-tint in 
strong light. Balancers, darker, slightly ehitinous on costal margin, bearing 
one long, hooked claw which fits into a pocket in the wing. 
Although the head is very small and much reduced, and bears four reddish 
ocelli, the thorax is very large and well developed and bears a black, shield- 
shaped ehitinous plate on the meso-scutum, from which three dark, ehitinous 
bands extend to the anterior margin of the thorax. 
The legs are long and hairy for their entire length ; the tibia bear a pair 
of strong spines on their distal extremity ; the tarsi are armed with numerous 
spines ; the claws are long and curved, and bear a sharp denticle on the ven- 
tral margin, near the tip. Two knobbed digitules are present, extending 
beyond the tip of the claw. 
EXPLANATION OF PLATE. 
Fig. i — Adult male. Fig. 2— Balancer with hook fitting into pocket in 
wing. Fig. 3 — Posterior tarsus of male. Fig. 4 — Adult female. Fig. 5 — Pos- 
terior tarsus of female. Fig. 6 — Lateral lobe of abdominal extremity of 
female. Fig. 7 a — Left antenna of female. Fig. ~ t b — Right antenna of female. 
The males were found emerging from the pupa-eases from 
April 13 to 18, and taking wing readily. 
The females were found, during the winter, under loose bark 
on the trunks and larger limbs of Platanus occidentalis on the 
campus of Ohio State University at Columbus. Not abundant. 
A Chalcid parasite was reared from specimens collected in Feb- 
ruary. 
The above description and drawings were submitted to Prof. 
T. D. A. Cockerell, to whom the author is greatly indebted for 
