1909] GIRAULT AND SANDERS — CHALCIDOID PARASITES 127 
ciliate, somewhat clouded and with a distinct fumated area just caudad of the margi- 
nal vein and the curved distal portion of the submarginal vein; grooved, punctate 
transverse line of the scutellum curved convexly at the meson; metathorax with a 
slightly larger neck. Eyes sometimes a brilliant carmine. 
Antennae about the same shape as in the female, but slenderer, less densely 
and more softly pubescent, the funicle joints relatively longer, the apical club joint 
more pointed, the scape relatively stouter. 
Ring-joints more nearly equal, the second longer than the first, however. First 
funicle joint quadrate, sometimes longer than wide; pedicel stouter and shorter, but 
distinctly much longer than the proximal funicle joint. Longitudinal carination 
present on the club only. 
(From 143 specimens, 32-inch objective, 1-inch optic, Bausch and Lomb.) 
Viewed with a hand-lens (Coddington, $-inch, Bausch and Lomb), the female 
is a deep rich dark green, the abdomen nearly black, the head and thorax dorsad 
reflecting brassy scintillations, in some lights entirely brassy; in the ventral aspect 
and also the lateral, the thorax appears bluish; the antennae dark, the scape and 
pedicel a rich brown, the legs mostly brown with darker femora. On the contrary, 
the males appear a brilliant bright metallic green, reflecting brassiness, the antennae 
and legs light yellowish brown, the wings small, clouded, with a soiled appearance; 
the ventral aspect is the same but with slight traces of metallic bluish. "The male is 
noticeably more brilliant and bright than the female, which is somewhat sombre. 
The appearance of the two sexes to the naked eye is also characteristic. ‘The 
females appear as comparatively large, stout, blackish gnats, with large, clear wings; 
the males as a rule appear to be a half size smaller, the wings less conspicuous and 
clouded, often not noticed at all, the bright greenness of the body and the light 
yellowish antennae and legs being characteristic; further the females are distin- 
guished by their comparative stoutness, the stout abdomen (and its usually triangular 
shape, lateral aspect), while the abdomen of the male is flat, with the penis exserted 
and curved. In life, however, it is not so easy to distinguish the sexes, as the abdomen 
of the male is then decidedly stouter, thicker dorso-ventrad and the genitalia con- 
cealed. As a matter of fact, the insect has a different appearance in life, and at a 
casual glance, there is not very much difference between the sexes in abdominal 
characters. The parasites are also noticeably larger in life than in death, and the 
abdominal segments are then fully extended; at a casual glance the males appear to 
be wingless. The following descriptive notes were made from specimens recently 
emerged (after 2 hours) and stupefied with chloroform: Female — Segment 2 of 
the abdomen longest, but only a fourth the total length of the abdomen; 3 next in 
