226 THE CANADIAN ENTOMOLOGIST. | 
wider than the forewing, falcate beneath the apex ; discal cell short, rather 
wide, closed by a bow-shaped, oblique discal vein ; costal vein and basal 
portion of the subcostal almost coincident with the costal margin, ‘the 
. subcostal curving downwards towards the discal vein, and again upwards. 
from the discal vein to the apex, before. which it becomes furcate, sending 
a branch to the costal margin above, and another below the apex; the 
discal vein sends a branch to the dorsal margin from its middle; the 
median ts furcate from the discal vein, and sends a branch to the post- 
erior margin from about the middle of the cell ; submedian and internal, 
simple. 
It therefore approaches Ypso/ophus in the neuration, as well as in the 
palpi. It is still more nearly allied to Azorthosia, Clem., but the neuration 
is quite distinct. 
AS. gracilella. LN. sp. 
Pale ochreous yellow. A small brown spot on the costa near the base, 
another on the fold about midway of the length of the wing, and another 
nearly opposite it near the costa. A row of small brown spots extending : 
around the apex. Wing sparsely and faintly dusted with brown. A/ar 
ex. not quite 34 inch. Kentucky. Larva unknown. | 
The body is slender and the legs rather long. A single specimen was 
taken May 7th, resting upon the trunk of a tree. When disturbed it 
fluttered around for a moment, re-alighting always on the same tree. 
DESCRIPTIONS OF NORTH AMERICAN HYMENOPTERA, No. 4 
BY, Het <CRESSON, 
Continued from Vol, 4, Page 84. 
Genus Microctronus, Wesm. 
MICROCTONUS AGILIS. JV. sf.— ff. Piceous, shining; clypeus and 
mandibles testaceous ; palpi whitish; antennae longer than head and 
thorax, slender, fuscous, basal third pale; pleura beneath, rufo-piceous ; 
tegulæ whitish ; wings hyaline, iridescent ; nervures and stigma fuscous, 
the latter large, lanceolate ; marginal cell longer than stigma, lanceolate ; 
legs, including coxæ, pale honey-yellow, extreme tips of posterior tibiæ 
dusky ; abdomen smooth, shining, depressed, first segment tinged with 
rufo-piceous, gradually dilated to apex. Length .10 inch. 
ffab.—Illinois. One specimen. 
