38 
and also subequal in length; joints one to three are cylindrical 
or slightly stoutest at the apex; the fourth being elongated oval. 
The third and fourth are slightly annulated, each bearing a small 
and movable thumb. The legs are long and stout, with the hairs and 
digitules very similar to those of previous generations. The rostrum 
is stout and reaches to the posterior coxe. 
Fourth generation; second stage.—In this stage they measure 
between 0.6 to 0.9"" in length and are broadly ovoid, broadest across 
the thorax and gently tapering toward the end of the body. They 
are of a reddish color, marked with two large and triangular, dusky 
or black spots near the anterior margin of the head, two to four 
small dusky spots between the eyes and a dusky, depressed subdorsal 
spot each side on the prothorax. Eyes, antenne and legs black, the 
rostrum dusky. The body is covered with a white and powdery 
secretion, most profuse along the middle. There has now also 
appeared a short and dense brush of a white and glistening secretion 
each side near the end of the body. The rostrum is shorter than 
before and reaches to the median cox; antennze four-jointed as 
before; the two basal joints, as usual, short, subequal in length 
and slightly stoutest at the apex; the third joint is longest and eylin- 
drical, the fourth but slightly shorter and both bearing a short thumb 
near the apex; there is a rather long bristle near the apex of the two 
basal joints and a number of small hairs at the apex of the fourth. 
The anterior and median tarsi have been lost or are represented by a 
minute rounded stump. The hind tarsi are present, but have lost the 
claws; bristles and digitules of hind tibiz and tarsi are present. The 
hairs of the head and body are now much longer and stouter than in 
the first stage. 
Fourth generation; third stage.—In this stage they are almost 
identical with those in the previous stage, though they are now almost 
globular, 1"™™ in length and of a dark-greenish or brownish-green 
color, marked with two large dusky spots on the head, reaching beyond 
the eyes. The powdery secretion forms now a distinct white line 
along the middle of the back. The rostrum has grown still shorter 
than before; the tail is broad, provided with six hairs and densely 
covered with rows of minute and sharp spines. 
Fourth generation; adult female, or fourth stage.—The adult female 
of this generation is very convex, almost globular,.1.2 to 1.6™™" long 
and 1 to 1.2™" in diameter. They are at first dark brownish-red, 
changing gradually to dark yellowish-green, and finally to a purplish 
color; the front of the head, two small dots on the prothorax, a band 
at base of the tail, tip of tail and of the two lobes of the last segment, 
eyes, antennee, legs, and rostrum, all black. They are slightly dusted 
with powdery secretion as before, and bear also a short brush of 
secretion along both sides of the abdomen. The segmentation of the 
body is quite distinct; there is also a rather deep dorso-lateral groove 
