428 THE AMERICAN NATURALIST. [Vor. XXXVI. 
reach the clypeus, lateral margins produced into a pair of triangular lobes 
(Fig. 11, x) inclined forward and devoid of hairs, each divided by a suture 
into two triangles; ligula infolded into mouth, adhering to the labrum; 
basal segment of labial palpus very large, flattened, fourth segment as long 
as second and third combined. On each side of the mentum arises a lobe 
of the gena (Fig. 11, y) which projects over the base of the mandible, 
deeply emarginated on anterior border. The hairs (Fig. 5) on the head, 
as well as on the body, are of peculiar structure: the base of a hair is con- 
stricted so as to close the cavity within, and the integument is raised around 
the constricted portion; the hairs are of two kinds, smooth and serrated ; 
some of the serrated hairs are enlarged at the tip. 
Thorax flat, much broader behind than in front, luteo-fuscous mottled 
hairs, all of which are fuscous or black; 
prothorax freely articulated with meso- 
thorax, much narrower than head, much 
broader than long; metathorax broader 
_ than head, bearing above three ellipsoid 
swellings, each of which has the margin 
depressed below the general level; one lies 
near the anterior border, the other two near 
the lateral borders and are connected by 
a deep groove; two pairs of lateral lobes, 
anterior pair short, conical, inclined for- 
ward, terminating in a few black setae which 
are packed together so as to appear like 
the end of the lobe, second pair very long, 
inclined forward at base, then bent slightly 
backward, fringed with large, serrated hairs; there is a pair of spiracles below 
ar t 1 TA 1 J aL +h, 
£141 x 

4 d 
Fic. 14. — Ulula hyalina. Pupa, 

p air of lobes; | , 
a pair of ellipsoid swellings above, similar to those on mesothorax, a pair of 
lateral lobes, shorter than pair on mesothorax, inclined forward, fringed 
with large hairs; a pair of spiracles below, near bases of lateral lobes ; legs 
luteo-fuscous with fuscous hair, anterior pair small, each succeeding pair 
larger, coxa very long (see Fig. 13),! trochanter small and almost rigidly 
attached to the femur, tibia slender, tarsus of a single small joint, ungues 
black, much curved. 
Abdomen broad and thin, dorso-ventrally compressed, pointed behind, 
lateral margins very convex, luteo-fuscous mottled with fuscous, covered 
with hairs which vary from fuscous to black, flattened and wrinkled below, 
. ! Redtenbacher (/oc. cit., Fig. 116) gives a different interpretation to the joints 
of the leg of the antion. He calls coxa what I believe to be a much-developed 
articular membrane (Fig. 13, y), and what I have called the trochanter he regards 
as part of the femur. The articulation between the trochanter and femur is not 
well developed and allows very little movement, but it cannot be overlooked. I 
may add that my i ion i ed 
l 
pretation is based on comparison with the imago. 

