THE CANADIAN ENTOMOLOGIST. 29 
deep coloured basal third of the wing, and the mark itself being overspread 
with the same colour as the basal third, but a little paler, and scarcely at 
all distinguishable from the portion of the wing beyond it. Trigonal mark 
and apical portion of the wing beyond it, distinctly, but sparsely, flecked 
with white. The trigonal spot reaches nearly to the dorsal margin, and has 
two minute white streaks at each of its costal angles, and there is a very 
small white costal streak at the beginning ‘of the ciliae. Ciliae of the 
general hue. Posterior wings and ciliae dark bluish-fuscous. Anterior’ 
coxae, trochanters, femora and basal half of the tibiae, of the general hue, 
except a white annulus on the middle of the femora, and two large white 
spots on its under surface, and a white annulus about the basal fourth of 
the tibiae. Tarsi and apical half of the tibiae white ; tarsal joints tipped 
with brown ; intermediate tarsi white, tipped with brown ; posterior legs 
whitish. Alar ex. about xs inch. 
The larva mines the underside of the leaves of the Black Walnut 
( Fuglans Nigra) in August and September. After a time, it leaves the 
mine and goes to the upper surface, where it curls over the edge of the 
leaf, and passes the remainder of its larval and its pupal states; the imago 
emerging in the fall, and most probably hybernating. 
In general colour it bears some resemblance to G. purpuriella, ante, 
but is a slenderer insect, and the trigonal mark, which is scarcely discern- 
ible in this insect, is very distinct in that. Kentucky. Rather common. 
HEMIPTERA, HETEROPTERA AND DERMAPTERA (ORTH- 
OPTERA) OF AMERICA TO THE NORTH OF THE 
UNITED STATES. 
BY FRANCIS WALKER, F.L.S., LONDON, ENGLAND. 
HEMIPTERA, HETEROPTERA. 
Part 1. Family PACHYCORID/. 
Homamus exilis, H. Sch., Nova Scotia. 
Family ODONTOSCELIDÆ. 
CoRIMELÆNA unicolor, Pal. Beauv. Nova Scotia. 
do nigra, Dallas. Lake Huron. St. Martin’s Falls. 
