50 PROCEEDINGS OF THE NATIONAL MUSEUM vol. 74 



Thorax dark blue-green, quite shining, but covered with brown 

 pollen when seen obliquely; a narrow line of whitish pollen curves 

 over the humeri, a large spot of silvery white pollen at the suture 

 and a minute dot above the lateral corners of the scutellum. Abdo- 

 men black with metallic reflections. Hypopygium large, black, 

 sessile, its lamellae moderately large, yellow with short yellow hair, 

 nearly round, but a little pointed at tip. 



Fore coxae yellow with very short black hair ; middle coxae largely 

 blackish, hind ones yellow, considerably blackened at base; femora 

 and tibiae yellow; all femora with very short hair, no longer ones 

 below ; fore tibiae with one bristle on lower posterior edge ; middle 

 tibiae with two large bristles on lower anterior edge and one on lower 

 posterior surface; all tarsi plain, blackened from the tip of the first 

 joint; joints of fore tarsi as 39-13-9-8-10; of middle ones as 

 52-28-20-12-12 ; those of posterior pair as 41^2-29-12-12. Calyp- 

 ters and halteres yellow, cilia of the former black. Posterior basi- 

 tarsi with a large but not erect bristle below near the base. 



Wings slightly tinged with brown, gray on posterior margin; third 

 vein slightly bent back at tip; last section of fourth vein bent just 

 beyond its middle, then arched so as to be nearly parallel with third 

 vein at tip, reaching the wing margin before the apex of the wing; 

 cross vein 23, last section of fifth vein twenty-one fiftieths of a 

 millimeter long; hind margin of wing scarcely indented at tip of 

 fifth vein. 



Described from one male taken by J. M. Aldrich at Tamau, Alta 

 Vera Paz, Guatemala. 



ry/?e.— Male, Cat. No. 41059, U.S.N.M. 



PARACLIUS TERMINALIS, new species 



Male. — Length, 3 mm. Face rather wide, narrowed below, silvery 

 white; front green; antennae yellow, third joint small, black at tip, 

 not as long as wide; arista black, pubescent; lateral and inferior 

 orbital cilia white. 



Thorax and abdomen green with bronze reflections. Hypopygium 

 small, black, yellow at tip; its lamellae white with a very narrow 

 black border, oval, but not much longer than wide, with minute 

 white hair. 



All coxae, femora and tibiae yellow, tips of posterior tibiae 

 blackened a little, middle ones also a little darkened at tip; hairs 

 of fore coxae black; fore tarsi mostly yellow; middle tarsi (fig. 58) 

 with first two joints reddish yellow, third and fourth black, fifth 

 snow-white with white hair, last three joints a little flattened and 

 widened, with long dense hair; hind tarsi wholly black; joints of fore 

 tarsi as 30-12-9-6-6; of middle ones as 39-22-18-15-10; first four 



