240 Annals Entomological Society of America  [Vol. V, 
tracheal branch supplying Sc; is much weaker than that extend- 
ing through Sc.. The preservation of both branches of subcosta 
is peculiar to the Jugatza2 among the Lepidoptera. In the 
Hepialide, this condition differs with the different species; in 
some species they are both well preserved, in others the portion 
representing the free part of Sc: is sometimes present in both 
wings, sometimes present in the front wing and wanting in the 
hind wing or vice versa, or it may be entirely wanting in both 
wings, while in still other species no trace of it is ever found. 
The portion of subcosta always preserved is the long, straight 
stem representing Sce, so that if we may judge from the 
form of the vein preserved and the decadent condition of the 
trachea of Sci, as shown here, the tip of the subcosta as pre- 
served throughout the higher Lepidoptera must be Scz. 
Humeral Cross-Vein.—The humeral cross-vein is usually 
preserved in the Hepialide. It is distinct in this species and 
located in its usual place between costa and subcosta near the 
base of the wing. 
Radius.—The radius, both so far as the tracheze and the 
developing veins are concerned, consists of five branches. A 
basal stem dividing dichotomously into an unbranched vein, Ry, 
and a stem which divides dichotomously into Re+ 3; and R4+s. 
Each of these in turn divide dichotomously, the anterior into 
R, and R; and the posterior into Ry and R;. The number of 
branches and their method of dividing is identical with the 
hypothetical type. The radius of the hind wings of Hepialus 
as is common in the Jugate, contains as many branches as the 
radius of the front wings. 
Media.—The media of both wings is similar in form and 
consists of three branches. The median trachea of each wing 
lies in the same vein cavity as the radial trachea at the proximal 
end of the wing. They extend along side by side for some 
distance, then the medial trachea bends away from the 
radial trachea, and pass into the median vein cavity. The 
median trachee branch dichotomously near the base of each 
wing, the anterior branch from this dichotomy after a short 
distance divides again dichotomously into M, and M:. The 
posterior branch from the first dichotomy passes unbranched 
directly to the wing margin. This branch of media in the 
hypothetical type gives rise to M3; and My. None of the 
pupal wings of Hepialus examined gave indication of smaller 
