338 Professor Aldrich on the 



Cgeloglijtcs,* n. g. 

 $ . First joint of antennas bare, the second short, with a pro- 

 longation along the inner side of the third ; the latter somewhat 

 crescent or kidney- shaped, with a subdorsal arista. Face narrow, 

 more so a little below the antennae. Ocellar tubercle distinct, the 

 ocellar and lateral bristles strong. Thorax elongated, the wings 

 attached far behind the middle. Acrostichal bristles in two rows. 

 Small humeral bristles covering an area of half the length and 

 almost all the width of the dorsum, comparatively large. A large 

 concave surface begins at the middle of the dorsum and extends to 

 the scutellum including half the width. Scutellum with only two 

 bristles. Latero-dorsal thoracic bristles large. Fore and middle 

 coxae with considerable hair on the front side, hind coxa with a 

 single lateral bristle. Hind metatarsus half the length of the 

 following joint. Wings hyaline the apex a little pointed. After 

 the anterior cross-vein, the fourth vein runs somewhat backward, 

 diverging but little from the fifth, to the posterior cross-vein ; 

 thence it runs in a direct line toward a point a little before the 

 apex, near the margin it curves gently backward again, and ends 

 in the apex. Posterior cross-vein short, four times its length from 

 the margin. Sixth vein perceptible. 



1. Cceloglutiis concavus, n. sp. (PI. XI., fig. 105, wing.) 

 $ . Face white-pollinose, front more thinly so, showing a little 

 green. Antennae yellow, except the third joint which is brownish, 

 the inner side of the second is as long as the first joint, the ocellar 

 bristles are long, and curve back more abruptly than usual. Cilia 

 of interior orbit white. Proboscis rather prominent, brown, the 

 palpi yellow. Dorsum of thorax violet-green, the concavity more 

 pure green. Pleurae likewise violet-green, whitish-dusted. Halteres, 

 tegulas and tegular cilia yellow. Above the root of the fore 

 coxa are two white bristles. Abdomen rather broad and 

 flattened, blackish-green with black hairs and, especially on the 

 sides, some white ones; the ovipositor is black. Fore coxae yellow, 

 elongated, with a groove on the outer side ; the fore side has 

 numerous black hairs but no bristles. Middle and hind coxae close 

 against each other, rather distant from the front ones ; the middle 

 ones are blackish with yellow tip, hairy in front ; the hind ones 

 yellow a little darker at base, with a whitish lateral bristle. 

 Femora and tibiae yellow, the extreme tips of middle and hind 

 tibiae blackish. Tarsi infuscated from the tip of first joint, the 

 front ones less so. Wings a little greyish, with yellow veins as 

 figured. Length 2*2 mm. ; of wing, 2-1 mm. 

 A single female. 



* KoiAos, concave ; -yKovros, rump. 



