NO. 2115. NEW NEOTROPICAL MUSCOID FLIES— TOWNSEND. 439 



ing light golden pollen most thickly on basal half or two-thirds of 

 second to fourth segments. Extent of pollen visible varies with inci- 

 dence of light. Venter ashy. Legs black. Wings, clear, tawny at 

 base. Tegulae whitish, with tawny margins. 

 Holotype.—C&t. No. 19458, U.S.N.M. TD 4267. 



Family RHODOGYNIDAE. 

 SIPHOPSALIDA, ne^jv genus. 



Genotype. — Sipliopsalida Tneridionalis, new species. 



Differs from the other genera of the Leucostoma group by the fol- 

 lowing characters: Proboscis slender, conspicuously longer than 

 head-height, about one and one-third times same. Rechnate ocellar 

 bristles in female as strong as the strong fronto-orbitals and frontals; 

 two strong verticals in female, not decussate. Lower border of 

 head equahng or slightly exceeding frontal length. Epistoma very 

 prominent, projecting forward. Vibrissae strong, set back from but 

 nearly on level with oral margin. Cheeks of female narrow, the eyes 

 descending very low. Face hardly wider than front in female. 

 Third antennal joint longer than second. Abdominal macrochaetae 

 very distinct, the abdomen without long erect hairs. Fourth segment 

 glabrous, without hairs except a few short fine ones on posterior 

 portion. First two segments with median marginal pairs of bristles, 

 third segment with marginal row. Female forceps meeting apically 

 at acute angle, not toothed. A short but distinct costal spine. 

 Petiole of apical cell about as long as hind crossvein. Tegulae of 

 normal size. 



SIPHOPSALIDA MERIDIONALIS, new species. 



Length of body, 5.5 mm.; of wing, 4 mm. One female, San Diego, 

 Casma, Peru, on cotton fohage during outbreak of Alabama argillacea, 

 April 7, 1912 (Townsend). 



Black. Parafrontals, parafacials, and cheeks pronounced silvery- 

 white, but with obscure reflections in certain oblique hghts. Clypeus 

 and epistoma silvery on yellowish background. Antennae blackish, 

 with faint grayish bloom. Palpi pale yellowish. Occiput ashy. 

 Pleurae and thorax before suture well poUinose with silvery-white. 

 Mesoscutum behind suture and scutellum faintly silvery. Abdomen 

 polished black, not pollinose. Legs black. Wings nearly clear. 

 Tegulae ta^vny~white. 



Holotype.—C&t. No. 19459, U.S.N.M., female. TD 4095. 



Family PHASIIDAE. 



ECTOPHASIOPSIS, nevy genus. 



Genotype — EctopTiasiopsis chilensis, new species. 

 Resembhng EctopTmsia Townsend in general appearance, form of 

 abdomen and wings, but differing in the closed and petiolate apical 



