174 PROCEEDINGS OF THE ACADEMY OF [1898. 



Width of head about 2.4 mm., of front about 0.7 mm. Vitta occu- 

 pies about one-third of the front. The genre and the ventral quarter 

 or fifth of the geno-vertical plates are silvery-white or dead black, 

 according to the incidence of the light, the remainder of the geno- 

 vertical plates, the ocellar prominence and the dorsal half of the 

 posterior orbit are metallic violet or green ; the ventral half of the 

 posterior orbit is silvery white, dead black or with metallic reflect- 

 ions according to the incidence of the light ; the buccse are dead 

 black or metallic violet according to the incidence of the light ; the 

 vibrissal ridges are black with slight metallic reflections ; the frontal 

 vitta is dead black. The bristles of the vertex are as in cornicina; 

 the hairs of the geno-vertical plates (there are no orbital bristles) 

 are as in cornicina, but much less numerous; the bristles of the 

 vibrissal ridges are yellowish-brown and arranged as in cornicina; 

 the buccse are sparsely beset with delicate yellowish-brown hairs. 

 Palpi black or dark brown, dilated at the apices; proboscis black 

 or dark brown, with some metallic reflections. Antenna, 2d joint 

 0.2 mm., 3d joint 0.6 mm.; color brown, 3d joint lighter than 2d. 

 The whole thorax and abdomen has a finely punctate appearance 

 and is remarkably free from macrocksetse, although quite as thickly 

 clothed with fine hairs as is usual in the Muscidae. 



Bristles of thorax. — I, 3a, 3b, 3c. Humeral, 1. Dor so-central, 4, 

 2 in front and 2 behind the suture, the posterior is of good size, the 

 rest are minute. Intra-alar, 1, very small. Supra-alar, 1, very 

 small. Post alar, 2, as usual, of good size. Notopleural, 2, as usual, 

 of good size. Scutellar, apical and two marginal, of good size. 

 Tegulse hyaline ; Halteres pale yellow. 



Legs. — Femora black or very dark brown, with some metallic 

 reflections. Tibise and tarsi black or very dark brown ; bristles of 

 legs much smaller and less numerous than usual in the Museidse. 



Fore Leg. — Femur. — Only oneextenso-lateral row of bristles, and 

 this is made up of fewer and smaller bristles than usual. Bristles 

 of flexo-lateral row smaller and much fewer than usual. Tibia. — 

 No prominent bristles except the preapical of extensor border. 



Middle Leg. — Femur. — The usual rows are present, but the indi- 

 vidual bristles are small, and there are but few of them. The only 

 respectable sized bristle of the femur is the preapical of the poste- 

 rior surface. Tibia. — Anterior surface no bristles at all. Posterior 

 surface. — One prominent bristle at the middle of the tibia and a 

 varying number of other much smaller bristles. Flexor surface. — 



