1951] 
Carpenter — Oliarces 
33 
The following account of the structure of Oliarces clara 
is based on the holotype (male) and the new specimen (fe- 
male), which is here designated the allotype: 
Frons and vertex dark brown to black; clypeus, mouth- 
parts and antennae light reddish brown; pronotum and 
mesonotum dark brown to black; metanotum dark reddish 
brown, lighter near wing bases ; legs yellow-gray to medium 
brown; abdominal tergites medium brown, membranous 
areas yellow-brown ; last two abdominal segments dark red- 
dish brown above; abdomen yellow from beneath. Wings 
hyaline, the bases tinted with reddish brown. Antennae 
(broken away at second segment in holotype) with 40 sub- 
equal segments. Body in general covered with long brown or 
black hairs. Fore wing of holotype 16 mm. long and 5 mm. 
wide (maximum) ; that of allotype 20 mm. long and 7 mm. 
wide. Both pairs of wings are of similar texture, being color- 
less and hyaline. Each wing bears two distinct nygmata. 
The wing venation of the allotype is shown in text-figure 2 ; 
that of the holotype has already been figured by Banks 
(1908). As Adams has pointed out, the venational differ- 
ences in the wings of the two specimens are well within the 
limits of variation occurring in other Neuroptera. A dis- 
cussion of the generic features of the venation is included 
below. 
The terminal abdominal segments of the male, briefly des- 
cribed by Banks, are illustrated here (Plate 4, fig. 2) in 
detail because of their significance in determining generic 
relationships. The ninth tergite is much longer laterally 
than dorsally, being reduced to a narrow strip in the mid- 
dorsal region. The ninth sternite has migrated posteriorly 
so that it is ventral to the tenth tergite; it is long laterally 
but constricted medially. The tenth tergite is conspicuously 
extended to form the anal plates, which are directed more 
dorsally than ventrally and which appear from above like 
hairy knobs. A posterior-dorsal view of the abdomen clearly 
shows the anus, as well as a pair of sclerotized structures 
which are apparently the modified tenth sternite. 
The terminal segments of the female abdomen are shown 
in figure 3B, drawn from Mr. Adams’ specimen. Although 
