119 
"Legs .01 of an inch in length, each reaching about one half way 
to its fellow of the opposite side. Tarsus one-jointed, as long as the 
tibia, tapering regularly, terminating in a single stout curved claw ; 
tibia and femur of about equal length ; trochanter as long as the coxa. 
Legs very minutely sparsely hairy throughout. Rostrum very minute, in 
the form of a thick tubercle projecting downwards in front of the 
bases of the anterior legs, scarcely longer than wide, about half the 
length of the femur." 
I may add, after a study of the types, that the bristle of each 
caudal tubercle (anal lobe) is subtended by a pair of conical projec- 
tions (Fig. 34, a) ; the anal ring bears six long bristles; the tarsal 
digitules are four in number and knobbed, as in Figure 35 ; and the 
claw bears no teeth. The largest of the types is 2.5 mm. in length. 
Fig. 33. — Antennae of Pseudococcus trifolii: a, winter female; b, summer female; 
c, larva. Greatly enlarged. 
The summer female has been described by G. C. Davis and by R. 
H. Pettit. The latter author writes: "The adult female measures a 
little more than two millimeters in length, is reddish brown, in color, 
covered with a coating of waxy or mealy secretion. The legs are dirty 
yellow in color. From the sides project 15 to 17 (usually 17) waxy 
processes, forming a fringe around the body in the usual manner, 
with the shortest filaments near the head, and those near the tail con- 
siderably longer, sometimes one third as long as the body. The anten- 
nae [Fig. 33, b] are eight-jointed; joint one is swollen, as broad as 
long; two and three are subequal, each about as long as one; four, 
five, six and seven subequal, a little over half as long as two or three; 
eight usually a little longer than five and six joined. There is consid- 
erable variation in four, it is sometimes smaller than five, six or 
seven, and sometimes slightly larger. The legs are dirty yellow, in 
length the tarsus of hind leg is slightly more than half the tibia, which 
about equals the femur. Digitules four; the two superior long and 
slender, the two inferior shorter and more stout. (The digitules were 
