26 
NEUROPTEROUS INSECTS. 
Length from one inch and a half to one inch and 
three quarters. 
It may be distinguished by the blue top of the 
frontal vesicle, and the ferruginous mark at base of 
the wings. The ferruginous cloud on' the middle 
of the wings is often altogether wanting. It also 
varies in having no abdominal vittse, excepting a 
vestige at base. The blue color sometimes extends 
down the front. The abdomen is also sometimes 
blue, and the thorax sometimes black. Drury de- 
scribes the abdomen of the female as yellow, with 
black annulations, and that of the male blue. 
The inferior anal process is at least two-thirds 
the length of the superior ones, which are arcuated, 
with a tooth beneath near the tip, and at tip acute. 
A specimen from Dr. Harris. 
14. L. rubicundula. Abdomen sanguineous, with 
a lateral black vitta; wings pale ferruginous at 
base ; anal appendices in the male with a tooth on 
the inferior middle. 
Inhabits Indiana and Massachusetts. 
Male. Eyes brown, in contact above; front 
greenish- white ; mouth pale yellowish ; thorax ob- 
scure brown, immaculate; between the wings a 
little tinged with dull sanguineous ; wings with a 
very small ferruginous spot at base, not over one- 
tenth of an inch in length, more evident on the in- 
ferior wings ; stigma brown ; about nine marginal 
cellules between the stigma and middle of the 
wings ; tergum bright sanguineous, above carinate, 
immaculate, on each side a black line, which dilates 
