1909] GIRAULT AND SANDERS — CHALCIDOID PARASITES PA 
obsolete; face broad; clypeus small, subquadrate, its ventral (apical) margin trun- 
cate, its sutures distinct; immediately ventrad of the antennal insertions, along the 
median line between them and the clypeus is an obtuse convexity (frontal prominence) ; 
genal sulcus obsolete; (lateral aspect) face subconvex, the genae nearly as long as the 
eyes, rounded, the scape of the antennae not reaching to the apex of the vertex or to 
the cephalic ocellus; eyes ovate, not in the direct lateral aspect, practically hairless; 
(dorsal aspect) head about two and a quarter times wider than long, the vertex broad, 
its cephalic margin broadly emarginate at the meson, the occipital margin obtuse, 
nearly straight; eyes wide apart, the ocelli in a flat, obtuse-angled triangle, not 
especially near the occipital margin and distant from the eyes. Head somewhat 
wider than the widest part of the thorax. Antennae inserted slightly below (ventrad) 
of the middle of the face, just dorsad (above) of a slight transverse facial prominence, 
slightly above (dorsad) an imaginary line drawn between the ventral ends of the 
eyes, but still ventrad of a line drawn through the middle of the eyes or not half way 
up the eye margins, compact and short, the flagellum clavate, the pedicel much 
longer than the proximal funicle joint, the 
funicle joints all wider than long, except- 
ing perhaps the first, with two ring-joints, | 1 
a 3-jointed club and a 6-jointed funicle 
and but moderately pubescent (Fig. 1). 
Right mandible 4-dentate, the left 3- 
dentate, nearly as in Stenomalus 'Thom- 
son (1878). (Fig. 2.) 
Pronotum visible, rounded, narrow- 
ed mesad, about a third the length of the 
mesoscutum, its cephalic margin suba- 
cute. ‘The mesoscutum with the parap- 
sida] furrows incomplete, but extending Fig. 1. Antenna of Nasonia brevicornis Ash- 
from the cephalic margin for more than pecan naa cea canes Sle ae iar 
half the length of the mesoscutum; from Fig. 2. Mandibles of Nasonia brevicornis Ash- 
lateral aspect, thorax broadly, flatly mead, female, greatly enlarged, showing dentation. 
convex; axillae widely separated; scutellum with a narrow, transverse, grooved line 
at the base of its apical (caudal) fourth, composed of minute punctures; median and 
lateral carinae of the metathorax distinct, the latter curved; spiracular sulcus 
absent; spiracle of metathorax subreniform, somewhat near the postscutellar 
margin, its axis oblique; metathorax punctate, with little or no neck. 
Abdomen sessile, widest at the apex of the second segment (Ist body segment), 
