66 WHITE FLIES INJURIOUS TO CITRUS IN FLORIDA. 
without spots or traces of darker shades upon the wings. Only the 
purple eyes are free from the white wax, and are in sharp contrast to 
the color of the rest of the body. A detailed description of the adult, 
by Riley and Howard, follows: 
DESCRIPTION. ! 
9° —Length, 1.4mm.; expanse, 2.8mm.; four-jointed rostrum about as stout as legs; 
joint 1 shortest, joint 2 longest, and about as long as 3 and 4 together; joint 3 some- 
what longer than joint | anda littleshorter than4. Joint 1 of the 7-jointed antennze very 
short, as broad as long, subcylindrical, slightly wider distally; joint 2 twice as long as 1, 
strongly clavate, and at tip somewhat broader than 1, bearing 3 or 4short hairs arising 
from small tubercles; joint 3 longest, about twice as long as 2, slenderer than this and with 
a very narrow insertion, rather abruptly stouter at apical third, corrugated and ter- 
minating above in a small callosity resembling a similar organ in Phylloxera; joints 4 

Fic. 10.—The citrus white fly. Adult. a, Male; b, claspers of male; c, female; d, ovipositor of female; 
e, side view of head of female; f, antenna; g, enlarged margin of wing; h, tarsus and claws; i, tibia. 
a,c, Greatly enlarged; 6, d-i, more enlarged. (Adapted from Riley and Howard.) 
and 5 subequal in length, each nearly as long as 2, joint 5 bearing a short spine ante- 
riorly near apex; joints 6 and 7 subequal in length, each somewhat longer than 2, 7 with 
a stout spine at tip; joints 4 and 7 somewhat corrugate or annulate but less so than 
apical third of 3. The 2-jointed tarsi about half the length of the tibia, joint 1 of the 
hind tarsus bearing 6 rather stout spines on each side; joint 2 supporting at base 3 
rather prominent claws, the middle one longest. Ovipositor short, acute, and retrac- 
tile. Eyes divided into two by a curved pointed projection from middle of cheek, 
the upper portion being smaller than the lower portion. Wings clear, colorless; costa 
delicately serrate. General color, light orange yellow, tip of rostrum black, tarsi and 
part of tibia orange. 
$.—The male resembles the female in all important respects except in being 
smaller. Claspers about as long as preceding abdominal joint, or one-fifth the length 

' Riley and Howard, Insect Life, vol. 5, p. 222, 1893. 
