ART. 10 TROPICAL AMERICAlSr DIPTERA VAN DUZEE 6 



PSILOPUS DIGITATUS Van Duzee 



Psilopus digUatus Van Duzee, Canad. Ent., vol. 46, 1914, p. 391. 

 One male, taken by J. M. Aldrich, April 10, 1926, at Guatemala 

 City, Guatemala; and one male taken by C. M. Rouillard, at La 

 Providencia, Siquinala, Guatemala. 



PSILOPUS BILOBUS, new specie* 



Male. — Length 4 mm. Front green; face more blue-green, when 

 viewed from above wholly covered with silvery white pollen, rather 

 narrow, its suture at the middle. Palpi brown, proboscis yellow. 

 Antennae small, bristles on second joint scarcely as long as antenna ; 

 third joint rounded ; arista dorsal, about as long as the width of the 

 head. 



Thorax and abdomen green, shining; pleurae with silvery white 

 pollen, bristles of thorax and abdomen quite short; hairs of the abdo- 

 men black, but appearing pale in certain lights ; no long pale hairs on 

 the venter. Hypopygium (fig. 1) small, brown, with two long, 

 brown filaments, fringed with long pale hairs; these filaments reach 

 the middle of the venter of third segment from the hypopygium. 



All coxae, femora, tibiae, and basitarsi yellow; tarsi from the tip 

 of first joint and a very narrow streak on outer surface of middle 

 coxae black; fore coxae with pale hairs near the base, short black 

 hair on inner surface, outer side nearly bare, with a row of three 

 black bristles on apical half ; all femora nearly bare below ; fore tibiae 

 without bristle, middle ones with two pair of rather small bristles on 

 upper surface; posterior tibiae with one small bristle near the base 

 on outer side. Fore tarsi (fig. 2) with the second joint narrowed at 

 apical third so as to form a large lobe below at base and a small 

 one at tip; third joint not much longer than wide; apical joint of 

 hind tarsi a very little flattened and widened, but only enough to 

 appear rather stout; joints of fore tarsi as 72-21-7-22-8; those of 

 middle ones as 77-29-21-9-6; joints of posterior tarsi as 48-22-14^- 

 11-9. Calypters yellow with a narrow black margin and black cilia, 

 which appear pale in certain lights. 



Wings (fig. 3) wide and rather short, grayish; costa without cilia; 

 cross vein perpendicular to fourth vein ; fourth vein from cross vein 

 to fork 42, from fork to wing margin 22, cross vein 22, last section of 

 fifth vein fifteen-fiftieths of a millimeter long. 



Described from one male, taken by Nathan Banks, July 5, 1924, at 

 Fort Davis, Panama Canal Zone. 



Type. — In the Museum of Comparative Zoology. 



PSILOPUS LONGIPES, new species 



Male. — Length 4 mm.; of wing about the same. Face and front 

 green with blue reflections, face covered with white pollen when 



