1863.] 
231 
the quadrilateral to the arc, thence following the submedian vein to the 
base of the wing. Above this spot the whole basal area and the trapezium be¬ 
yond the arc formed by the osculation of the principal sector with the median 
vein, and also one or two of the basal areolets in each series of antecubitals, are 
all brown. Hind wings with a basal brown spot never extending into the 
postcosta, but following the postcostal vein from its base to the tip of the me¬ 
dian area, so as almost always to cover the whole length of the median area, 
thence proceeding so as almost always to leave the terminal ^ of the quadri¬ 
lateral hyaline, but occasionally covering the whole of that as well as the me¬ 
dian area, thence starting from the upper side of the quadrilateral and extend¬ 
ing in a more or less prolonged and obscurely defined tongue along the median 
vein towards the tip of the Aving, thence more or less gradually nearing the 
costal margin and attaining it at or before the origin of the wing. In one wing 
of a single specimen the spot does not attain the tip either of the median area 
or of the quadrilateral by 5 areolets. Above in both Avings and beneath in the 
front wing the veins and cross-veins covered by the spots, except those not far 
from its margin, are the same color as the spot, but in certain lights the cross¬ 
veins of the basal area on the under side of the front wing are milk-Avhite. In 
the hind wing, both above and below, the cross-veins dre sometimes lightly bor¬ 
dered with subhyaline. In the hind wing beneath most of the cross-veins and 
some of the veins covered by the spot are conspicuously milk-Avhite. All the 
other veins and cross-veins in both wings, both above and beloAv, black. Ex¬ 
treme tip of hind wings always more or less bordered with broAvn, and occa¬ 
sionally a trace of brown at the tip of the front wing. Pterostigma broAvn or 
pale-brown, variable in size, 1—2 times as long as wide, surmounting 1—2 cross¬ 
veins. In a single wing of two separate specimens it has a cross-vein as thick 
as its bounding veins; in a single wing of another it has a longitudinal vein in 
its middlein a single Aving of still another it is hyaline in its middle : and 
in tAvo wings of a fifth specimen it is rudimental and represented only by one 
thickened cross-vein. Antecubitals (12 specimens) 19—26; postcubitals (12 sp.) 
25—35. Cross-veins of basal area (front wing of 12 sp.) 4—7; of quadrilateral 
(same) 4—8. 
The 9 differs as follows:—Is^. The brown parts of the head are several shades 
paler, and the upper edge of the occiput is distinctly pale-brown, as well as the 
basal I of the 3rd joint of the antennae. 2nd. The prothorax is irregularly bor¬ 
dered with pale brown. Srd. The dorsum of the thorax is very pale reddish- 
brown or fawn-color to a little beyond the humeral suture on the upper part of 
that suture, with the dorsal carina and a short line at the top of the humeral 
suture, black. On each side of the tip of the dorsal carina a longitudinally 
oval spot i as long as the carina, and inside the humeral suture a lanceolate 
spot extending from the antealar sinus half-Avay to the prothorax, both bright 
grass-green. Pleura as in and with the same black lines above, but always 
* This is analogous to the supernumerary short longitudinal vein, in the 
place where the pterostigma ought to be, found in three wings of a single spe¬ 
cimen of 9 cruentata Eamb. {Monogr. Calopt. p. 129.) 
