44 PROCEEDINGS OF THE NATIONAL MUSEUM vol.74 



bend, then gradually approaching third at tip, reaching the wing 

 margin a little before the apex of the wing. 



Described from one male, taken by Nathan Banks, July 26, 1924, 

 at Barro Colorado Island, Panama Canal Zone. 



Type. — In the Museum of Comparative Zoology. 



PARACLIUS PARVICAUDA, new species 



Male. — Length 3 mm. Face and front silvery white ; face narrow, 

 a little wider below, suture near apical fourth, lower portion a 

 little lon<i;er than wide, almost pointed at tip; antennae wholly 

 black, third joint nearly round; arista pubescent; palpi black; lateral 

 and inferior orbital cilia yellowish white. 



Thorax dark green ; pleurae with silvery white pollen ; the velvety 

 black stripe above the root of the wing is not conspicuous, the white 

 spot at the suture large, but the white does not quite conceal the 

 ground color, it extends as a curved line over the humeri. Abdomen 

 green with white pollen; hypopygium very small, black, scarcely 

 reaching beyond the venter of the fifth segment, tapering toward 

 its tip ; lamellae not very small, black, rounded at tip, a little longer 

 than wide. 



All coxae and femora black; trochanters yellowish; fore tibiae 

 rather thick, yellow, the upper edge with silvery white pollen ; middle 

 tibiae yellow with posterior surface more brown; hind tibiae yellow 

 with apical third black; middle tibiae v/ith two large bristles below 

 and a small one between them ; fore tarsi sharply black from the tip 

 of the first joint, middle and hind ones wholly black; joints of fore 

 tarsi as 30-11-9-7-10; of middle ones as 43-23-17-9-9; those of 

 posterior pair as 31-35-22-12-10. Calypters and halteres yellow, 

 cilia of the former black. 



Wings dark grayish; costa not thickened; third vein nearly 

 straight; last section of fourth vein abruptly bent a little before 

 its middle, nearly parallel with third for some distance before their 

 tips, fourth reaching the wing margin before the apex of the wing; 

 cross vein and last section of fifth vein each twenty-one fiftieths 

 of a millimeter long; hind margin of wing notched at tip of fifth 

 vein. 



Femcde. — Almost like the male in form and color of head, thorax, 

 abdomen, legs, and feet, except that the fore tibiae are not so silvery 

 on upper surface and middle tibiae are mostly yellow, not being so 

 brown on posterior surface. 



Described from one pair taken by C. M. Rouillard at La Provi- 

 dencia, Siquinala, Guateuiala. 



Type—Male, Cat. No. 41054, U.S.N.M. 



