OF NORTH AMERICA. 181 



less distinct than those on the back. The first segment is entirely 

 black with a yellow edge, while the spots on segments 1 1 and 1 2 

 usually run into each other. Head small, brown, and retractile, being 

 usually hidden in the first segment. Fine scattering hairs anteriorly, 

 laterally and posteriorly. The young worm is of a very pale yellow, 

 covered with numerous fine white hairs, with a slight grayish brown 

 tint on the head, and with the fifth and seventh segments paler than 

 the rest, and having the black spots scarcely visible." The larva is 

 shown in Riley's figure 58 a, from which drawing I have reproduced 

 it on Plate 10, fig. 8 of this work. 



This insect may be distinguished from A. faharius by its larger 

 size, different shaped wings, and by its distinct neuration. From H. 

 iexana which also has a colored prothorax, and from H. coracina 

 which is entirely black, it may readily be separated by the bifid instead 

 of trifid apical vein. 



The following account of its habits is condensed from the interest- 

 ing paper of Mr. C. V. Riley (loc. cit. ) : The larvae may be found 

 in July and August feeding on the leaves of the Grape-vine. They 

 are gregarious, and when young leave the minor veins of the leaf un- 

 touched, but devour everything except the main ribs in their later 

 stages of growth. When full grown they disperse over the vines or 

 forsake them entirely, and spin a small, tough, whitish, flattened co- 

 coon, changing in about three days thereafter to chrysalis o 30 inch 

 long, broad flattened and of a light shiny yellowish-brown color. 

 Some of these chrysalides produce the moth in a few weeks, but the 

 majority are not evolved until the following spring, and thus the in- 

 sect is apparently double brooded. 



2-HARRISINA TEXANA. N. s. (PI. 8, fig. 1.) 



5 . — $ . Entire insect bluish black, except the prothorax which is 

 reddish orange, almost scarlet. The insect greatly resembles H. amer- 

 icana, and might readily be mistaken for the latter, but while the shape 

 of the wings is the same, the color is blue-black, instead of greenish- 

 black, the prothorax is much redder, and the apical vein is trifid instead 

 of bifid. 



Expanse of wings, o. So inch ; length of body, 0.38 inch. 



Jlabi/at.—Texn^ [Belfrage.] [Coll. Stretch.] 



Collected on the wing May 5th and September 4th. From these 

 dates it is presumable that its habits are similar to those of //. ameri- 



