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stigmal vein starting from the middle of the stigma and normally- 
curved; cubital vein obsolete for nearly one-third its length, the fureal 
forming with it almost a point; the terminal distance between first and 
second discoidals equal to about five times that between their bases 
(often rather more); terminal distance between fureal and cubital and 
second discoidal veins subequal, that between stigmal and fureal slightly 
shorter, that between second and first discoidal one-third greater, and 
about equal that between stigmal and tip o*f stigma. Hind wings with 
the subcostal vein almost straight, there being no curve where it gives 
off the discoidal veins, which are obsolete at their extreme base, and 
not confluent with it. [The wing-venation is very constant. Out of 
of nearly 100 specimens examined, I have found only an unusual shorten¬ 
ing of the cubital in two individuals.] The larva and pupa in this 
third generation differ from the winged insect in being more reddish 
and in having the antennae ringed with less distinct constrictions, in 
the legs being paler, in the claws being stronger, and in the basal joint 
of tasus being more connate with the terminal joint. They have a 
distinct annulated elevation at each side posteriorly—a sort of pseudo- 
honeytube. When first born, they are of a pale dull yellow, and the 
antennal joints are more nearly subequal in length. 
Fourth generation .—That from the first winged females: Differs 
from the preceding in the promuscis being much longer, in the antennae 
having but live joints, the third being somewhat longest and the first 
shortest, but all often being of more nearly equal length, with 
no annulated constrictions. The color is much more decidedly orange. 
When newly hatched, the thickened end of the promuscis often ex- 
tenps one-half the length of the body beyond anus. The legs are also 
long and stout, and the basal joint of the tarsus is distinct, but not 
separated. The capitate hairs are obsolete. It is born with an envel- 
oping pellicle or pseudovum, and though of a bright red with pale 
legs at first, soon becomes brownish, with dark members. 
“Fifth generation .—The counterpart of the second. 
“Sixth generation. —Second winged: Resembles the third, but usually 
rather lighter-colored with the wing-veins, the spinous armature of 
surfaces, and the constrictions of antenme less strong, and with the 
third joint of antennae rather less in length than the terminal three 
together. 
“Seventh generation. —True sexual individuals: Born within an egg¬ 
like pellicle. With stout promuscis reaching to between middle and 
hind coxae; the antennae 5-jointed, with the joints subequal. Bark¬ 
feeding. Orange in color. Undergoing one moult, and then being at 
once distinguished from the other forms by the brighter orange-yellow 
color, the rudimentary mouth, the more simple eyes (composed of three 
facets), by the shorter, 5-jointed antennae, the joints subequal in length; 
by the shorter legs, with smaller claws to the tarsi, and more distinct 
terminal capitate hairs, or pulviili. The skin is transparent, the body 
filled more or less with fatty globules. The female is nearly pyri¬ 
form, and averages 0.4mm in length. A single egg is visible through 
the translucent skin, and, according to age, occupies more or less of 
the whole of the body. The male is narrower and smaller, the penis 
being bulbous, with a couple of spine-like genital clasps.” 
