NO. 1935. MU8C0ID FLIES FROM SOUTH AMERICA— T0WN8END. 305 



EUMYOTHYRIA MERIDIONALIS, new species. 



Eumyothyria, sp. Townsend, Ann. Ent. Soc. Amer., vol. 4, 1911, p. 131. — 

 TD 3981. 



Length of body, 7 mm. ; of wing, 7 mm. Two females, Piura, Peru, 

 November 5 and 12, 1910. One on flowers on Mihania, sp., the other 

 on mesqnite trunk. 



Parafrontals and parafacials light golden pollinose, the facial plate 

 with pollen of a lighter shade. FrontaUa pale brown ; antennae brown, 

 the first two joints and base of third reddish-yellow. Palpi pale red- 

 dish-yellow. Occiput cinerous pollinose, the orbits faintly golden. 

 Thorax, scutellum, and abdomen thickly cinereous pollinose, with a 

 golden shade on abdomen, especially posteriorly; the mesoscutmn 

 with the four usual vittse, the sides of intermediate abdominal seg- 

 ments faintly reddish-yellow anteriorly, the hind borders of segments 

 more or less distinctly and narrowly margined with blackish. Wings 

 clear. Legs blackish. Three postsutural and three sternopleural 

 bristles. Third antennal joint about two and one-fourth times as 

 long as second. 



Type.— C&t. No. 15144, U.S.N.M. Female, November 5, 1910; 

 TD 3981,/. r. s. 



Deposits flat-oval macrotype eggs on host, after incubation in 

 uterus. 



EUTHELAIRA, new genus. 



Fronto-facial profile much rounded, especially in male, eyes dis- 

 tinctly and fairly thickly hairy. Frontal bristles strong and more or 

 less decussate, descending w^ell below base of antennae (only to middle 

 of second antennal joint when the antennee are downwardly exserted 

 and fully to base of third when antennae are retracted), but not 

 diverging from the parafacial margin. Front of female anteriorly 

 about the width of one eye, a little narrower at vertex; that of male 

 anteriorly fully two-thirds of eye-width, about one-half eye-width at 

 vertex ; face gradually widening from front, that of male below more 

 than twice and that of female less than twice vertex-width. Male 

 with one strong pair of reclinate inner orbital bristles in line with 

 frontals; female with same and behind it a strong outwardly di- 

 rected or divergent inner orbital, with two proclinate outer orbitals. 

 Male with a strong pair of long ocellar bristles, exactly and strongly 

 divergent; female with only a pair of very fine divergent hairs, very- 

 delicate and not over one-half the length of the male ocellar bristles. 

 This is one of the few cases known of the ocellar bristles furnishing 

 sexual characters. Facial ridges cihate nearly to fully halfway 

 up, vibrissae level with oral margin, latter cut off and not at all promi- 

 nent. Second antennal joint short, third long and reaching nearly 

 48702°— Proc.N.M.vol.43— 12 20 



