No. 145.] 
759 
but little shorter and more slender than the third, whilst the sixth is but half as long, 
and the seventh is double the length of the sixth, and quite slender and thread-like. 
The abdomen is short, and thick, of an oval form, and obtusely rounded at its apex, 
of a bright grass-green color, with a row of black dots along each side forwaid of the 
nectaries, one dot upon each segment. On its under side at the tip, are two square 
brown spots, more or less separated from each other as the abdomen is distended 
with aliment in a greater or less degree, and shove the apex are often three short 
blackish transverse stripes. The tail-like appendage in the female is black ^ and about 
a third as long as the nectaries, which are also black, and if pressed against the ab¬ 
domen, would reach its tip in the females, but are shorter in the other sex. The legs 
are pale dull yellow or whitish, with numerous even hairs; the feet, tips of the 
shanks, and of the thighs, black or dusky; the hind thighs black, except upon their 
basal third. The wings are transparent, but not perfectly pellucid, the stigma or 
opake spot towards the end on the outer margin, is dull white, and the veins are dark, 
tawny brown, the longitudinal rib-vein being paler and becoming whitish towairis its 
base, the third or forked vein is abortive and colorless at its base, and, as in many 
other species, the first vein has a dusky mark from its tip. running upon the margin, 
towards the base. The first and second veins are more than twice as far apart at 
their tips as they are at their bases; the third vein is slightly farther from the second 
at its tip than at its base, and is a third farther, or more, from tho second at base 
than thiH is from the first; the tip of the first fork is much nearer the tip of the 
second fork than that of the third vein, and is about the same distance from the tip 
of the third vein that this is from the second; the tip of the second fork is equidis¬ 
tant between the tips of the first fork and the fourth vein; the tip of this last is com¬ 
monly t wice as near the tip of the second fork as it is to that of the rib-vein. 
Individuals have been observed, in which the wing-veins varied from their normal 
state as follows: 
1. Tip of the third vein nearer that of the first fork than that of the second. 
Common. 
2. The second and third veins parallel with each other. 
3 The second fork very short, its tip only half as far from the tip of the first fork 
as from that of tlie fourth vein. 
4 Left wing with but one fork to the third vein, the second wanting. 
5. Right wing with three forks to tho third vein. 
6. Left wing with the s< coud vein slightly foiked at its tip. 
The following varieties in the colors and marks of this species may be specified. 
The greatest diversiiy in these respects occurs afler the coming on of frosty nights in 
autumn, it being then difficult to find two individuals with precisely ihe same hue 
and marks. This diversity is undoubtedly produced by the Cold to which tho insects 
have been exposed, and the unhealthy juices of the faded and decaying leaves which 
now furnish the only nourishment which is accessible to them. It might hence be 
deemed that the whole race wus now in a diseased state, if it were not that sexual 
interc >urse takes place freely, aud the ft males are all industriously occupied in de¬ 
positing their eggs. 
Variety a, pullidicornis. The antennas brownish yellow instead of black. Young 
individuals. 
