No. 2301. ]\rEW SPECIES OF MUSGOID FLIES— TOWNSEND. 555 



about four times second. Arista nearly bare; basal joints short. 

 Eyes bare. Frontals two below base of antennae. Two proclinate 

 fronto-orbitals in male, the hind one short. Ocellars weak. Para- 

 facialia very narrow, with row of four to five facio-orbitals. Cheeks 

 little over one-fourth eye length. One or two short geno-orbitals. 

 One preacrostichal and postacrostichal; two postintraalars and lat- 

 eral scutellars; three sternopleurals and postsuturals. A long decus- 

 sate apical pair of scutellars. Costal spine strong. First vein 

 bristled halfway and again in middle of distal half; third bristled to 

 small crossvein; others bare. Apical cell long-p etiolate, ending little 

 before tip; petiole as long as posterior crossvein; latter nearer to 

 small crossvein. Last section of fifth vein rather over half of preced- 

 ing section. No median marginals on first segment, median marginal 

 pair on second; marginal row on thii'd and anal segments. Male 

 claws minute; the front tarsi distinctly swollen and compressed. 

 Abdomen conical. 



MICROMINTHO MKLANU, new species. 



Length, 3.75 mm. One male. Globe Hills, Arizona, 3,300 feet, on 

 fohage of Thurheria, September 10, 1917 (C. H. T. Townsend). 



Shining black. Head silvery; face and cheeks more thickly so. 

 Antennae, arista, and frontalia brown. Palpi fulvous. Parafronta- 

 lia, thorax and scutellum thinly silver3^ Four black thoracic vittae. 

 Narrow front borders of last three abdominal segments silvery-white. 

 Wings clear. Tegulae watery-white. 



Type.~Cat. No. 22089, U.S.N.M. 



METALLICOMINTHO, new genus. 



Genotype.— Metallicomintho abdomindlis, new species. 



Differs from Micromintho as follows: Vibrissal axis only a little 

 less than antennal axis and about half head height. Third antennal 

 joint narrower than second and about four times latter. Arista pu- 

 bescent. Eyes indistinctly short-hairy. Female vertex not one- 

 third head width. Female frontalia not as wide as one parafrontal. 

 Parafacialia considerably narrowed below, with four strong facio- 

 orbitals down middle. Cheeks nearly one-third eye length. First 

 vein bare on distal half. Middle metatarsi as long as following joints 

 together. Female front tarsi plump, compressed, the claws minute. 

 A row of strong erect discals on anal segment. Apical crossvein 

 more oblique, nearly parallel with hind margin of wing. Abdomen 

 depressed. 



METALLICOMINTHO ABDOMINALIS, new species. 



Length, 6 mm. One female, Castle Butte, Arizona, 5,200 feet, 

 September 19, 1917 (C. H. T. Townsend). 



Shining olive-black. Head thinly silvery ; the parafrontalia mostly 

 black, only the outer portions silvery. Frontaiia soft dark brown. 



