130 



Genus TRICOGENA Rond. 



Tricogoia Rondani, Dipterologiie Italic;c Proclrouuis, A'ol. I, p. 88; 1856. 

 FranenfeldiaF,ggGr, Verliand. Kais.-Kon. Zool.-Botan. Gescll., Vol. XY, p. 297; 1865. 



This synonymy is according to Brauer and Bergenstamm:' 

 Palpi yellow, insect elsewhere black; front of female one and one- 

 fourtli times as wide as either eye, two pairs of orbital bristles, 

 frontal bristles descending to the arista, sides of face each at 

 narrowest part one-half as wide as the facial depression, each 

 bearing two downwardly curving macrochiiet;e, the lowest of 

 which is nearly on a level with lower ends of eyes, cheeks two 

 fifths as wide as the eye-height, vibrissie slightly above the oral 

 margin, one or two bristles above each; antennte four- fifths as 

 long as the face, the third joint only slightly longer than the 

 second, arista thickened on the basal fourth, the penultimate 

 joint broader than long; thorax whitish pollinose, not distinctly 

 vittate, three postsutural and two sternopleural macrochjietie, 

 scutellum bearing three long marginal pairs, abdomen shining, 

 the bases of the second and third segments whitish pollinose, 

 first three segments bearing marginal macrocluiette; middle tibiie 

 each bearing two on the front side near the middle; wings whitish 

 hyaline, the costal edge brownish, third vein bearing two bristles 

 at the base, hind crossvein midway between the small and the 

 bend, petiole of apical cell slightly shorter than the small cross- 

 vein, calypteres white; length, 5 mm. Colorado. A female 

 specimen. Type No. 3635, U. S. National Museum . costalis n. sp. 

 Palpi black, insect elsewliere black ; front of female almost as wide as 

 either eye, frontal bristles descending slightly below base of 

 first antennal joint, sides of face at narrowest part each one-fifth 

 as wide as the median depression, each bearing a row of macro- 

 cha^tai and scattered black hairs, cheeks nearly one third as 

 broad as the eye height, antenna3 three-fourths as long as the 

 face, the third joint twice as long as the second ; body with a 

 strong brassy tinge, three sternopleural macrocha'ta^, bases of 

 last three segments of abdomen whitish pollinose; wings hya- 

 line, the portion in front of fifth vein tinged with yellowish, 

 especially along the veins and crossveins, third vein bristly 

 almost to the small crossvein; length, 7 mm., otherwise as in 

 the above description of costaHs. Franconia, N. H. A single 

 female specimen collected by Mrs. A. T. Slosson. Ty])e No. 

 3030, IT. S. National Museum Metipennis n. sp. 



■Zweif. Kai8. Miis. Wien.VI, p. 238; 1893. 



