1963] 
Evans — Wasps 
9 
one fully closed discoidal cell, the second (lower) discoidal cell being 
closed below and on the outer side by obsolescent veins (19) ; outer 
part of wing membrane devoid of veins and cells (except marginal 
cell), but having three strong, parallel, unbranched hyaline streaks 
(20). Hind wing without closed cells, with only two short veins at 
the base (21 ) ; anal lobe distinct, large, fully .3 as long as total length 
of hind wing (22). Abdomen large, its articulation with the propo- 
deum rather broad ; first tergite broad at base, its anterior face strongly 
concave, fitting against the propodeum (23). No constriction what- 
ever between first and second abdominal segments; first sternite 
arcuately prolonged backward; overlying the second sternite (24). 
Apex of abdomen directed upward slightly, distinctly flattened dorso- 
ventrally, the apical sternite in particular rather flat (25). Sting and 
sting-sheaths strongly developed. (Figs. 1-8). 
Key to Genera 
Occipital carina well developed; malar space short, less than half as 
long as width of mandibles at their base; apex of marginal cell 
on the wing margin ; abdomen robust, the fifth sternite simple 
(Fig. 3) (Madagascar) Scolebythus new genus 
Occipital carina absent ; malar space well over half as long as width 
of mandibles at their base; apex of marginal cell curving away 
from wing margin ; abdomen slender, the fifth sternite slightly 
swollen posteriorly, the swelling terminating behind in a polished, 
triangular area which is flanked by two groups of dense, appressed 
setae (Fig. 7) (Brazil) Clystopsenella Kieffer 
Scolebythus new genus 
Type and only known species: S. rnadecassus n. sp. 
Scolebythus rnadecassus new species 
Plate 2, figs. 1-4 
Type: 9, MADAGASCAR: Mandritsara (Wulsin coll.) (Mus. 
Comp. Zool., no. 30494). 
Description. — Length 7 mm. ; fore wing 6.3 mm. Body piceous, 
shining; legs and antennae wholly dark brown. Wings hyaline, with a 
faint yellowish tinge, fore wing with a weak apical fuscous band ; 
costa, subcosta, and stigma dark brown, remaining veins amber to 
yellowish. Entire body covered rather sparsely with golden-brown 
setae, mostly rather short, but distinctly longer toward the tip of the 
