
616 THE AMERICAN NATURALIST. (VoL. XXXVI. 
The species which I have studied for this paper is Szsyra 
umbrata Needham, and all my specimens were collected for 
me, a few at Lake Forest and the remainder at Saranac Inn. 
I have necessarily worked under limitations, not having myself 
seen any living specimens. 
The adult (Fig. 1) is a smoky brown fly, 6-8 mm. long, very 
hairy, and with the characteristic venation of the Hemerobiide, 
although the wings are not so delicate and transparent as are 
those of the lacewing flies. The maxilla and labium of the 
adult, each with peculiar pediform, terminal, palpal joints, are 

Fic. 1. — Sisyra umbrata, adult. x 10, 
shown in Fig. 2. Other parts of the imago — antenna, leg, and 
wing — are figured and discussed later, in comparison with the 
same parts in the larva. 
The pupa, removed from its double cocoon of finely woven 
silk, is shown in Fig. 3. It is 4 mm. in length, has two 
clusters of hairs on the dorsal surface of each segment, and 
is similar to the larva in color and marking, except that the 
light median line on the dorsal surface between two dark ones, 
sO apparent in the larva, is not visible. Instead the brown 
crescent-shaped markings on either side meet in a dark median 
line. 
Larva — EXTERNAL ANATOMY. 
The larva (Fig. 4) is 6 mm. in length, is yellowish green in 
color, and has quite a distinct color pattern in brown on the 
dorsal surface. Each of the first seven segments bears, in two 
dorsal and two lateral groups, twelve projections, except the 
first abdominal, which has only four on the dorsal surface 
