1912] North American Scoluine 307 
species, being visible. At the side of the visible portion of the 
plate close to the margin of the dorsal sclerite is a projection 
more or less of the form of a spine but sometimes shorter and with 
a blunt end. It projects outward and backward from the 
general surface of the body at this point and its antero-posterior 
location on the plate varies somewhat in different species. 
“Wincs. The wings of this group as far as observed are 
generally fuliginous with a bluish, purplish, or even somewhat 
greenish reflection. Ina few cases the wings are nearly hyaline 
but then are liable to have a yellow tinge and more or less well 
developed fuliginous areas particularly toward the apex, and at 
these places the reflection appears. 
In this paper wing areas entirely enclosed by veins are 
termed closed cells while those not entirely enclosed by veins 
and extending to the margin are regarded as incomplete or 
open cells. At the base of the wing are three rather long 
closed narrow cells. These passing backward from the costal 
margin are respectively, the costal, median and submedian 
cells. Between the latter and the hinder margins is an open 
anal cell. Between the outer end of the costal cell and apex of 
the wing are two closed cells, the one next to the costal occupy- 
ing the place where the stigma is usually found and which may 
therefore be called the stigmal-cell. Itis quite narrow. Exter- 
nal to this is the much larger radial cell and extending from the 
latter to the apex, is a large open cell. Behind the stigmal cell 
lies the first cubital, lying behind the outer end of the costal 
cell and at the outer anterior corner of the median cell while 
its outer end is behind the inner portion of the radial cell. 
Behind the greater part of the first cubital and the radial cells 
lies the second cubital and in some cases, is a small closed cell, 
the third cubital between the outer end of the second cubital 
and the apex of the wing. The area sometimes occupied by the 
third cubital cell is sometimes thrown into the open cell already 
referred to which extends to the apex of the wing, there being 
no third cubital present in such cases. Behind the outer part 
of the median, the base of the first cubital and the base of 
the second cubital cells, lies the first discoidal and at the outer 
end of the submedian and behind the basal half of the first 
discoidal lies the second discoidal cell. External to the second 
discoidal cell and behind the outer parts of the first discoidal 
and second cubital cells lies the third discoidal cell, combined 
