588 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.56. 



Imitates Incamyia cuzcensis in general coloration and especially in 

 coloration and appearance of head, but has three heavy black thoracic 

 vittae instead of two. Antennae and palpi black. Face and front 

 silvery-white; the parafrontalia with a blackish maculation posteri- 

 orly and a fainter smaller one anteriorly in changing lights. Frontalia 

 and three heavy wide thoracic vittae soft brown-black; middle vitta 

 extending over whole scutellum. Four creamy-silvery vittae nar- 

 rower than the black ones, shading to golden posteriorly, and pleura 

 with two large subconfluent golden spots. Abdomen shining brown, 

 rather thinly buff -gold poUinose on first two segments; the pollen 

 more concentrated on base of second segment and thickly so on less 

 than basal half of last two segments, the rest of which is without 

 poUen. Wings nearly clear, yellowish costobasally. Tegulae bufiF- 

 yellow. 



Type.— Cat. No. 22221, U.S.N.M. 



METATACfflNA, new genus. 



Genotype. — Metatachina mellifrons, new species. 



Clypeus nearly flush. Epistoma very short, faintly warped. 

 Facialia bare. Proboscis little over half head height; palpi long and 

 stout. Third antennal joint over twice second in female. Arista 

 long, bare. Eyes bare. Female vertex a little less than one-thu-d 

 head width. Thi'ce frontals below base of antennae. Two proclinate 

 fronto-orbitals in female. OceUars present. Parafacialia bare, about 

 one-third width of clypeus below. Cheeks less than one-third eye 

 length. Three sternopleurals, postintraalars, postsuturals, preacros- 

 tichals, postacrostichals, and lateral scutellars; short divaricate 

 apical scutellar pair. Third vein bristled only at base; others bare. 

 Hind crossvein nearer to cubitus. Median marginal pah on first two 

 segments; median discal pair on intermediate segments; marginal 

 row on last two segments ; submarginal and discal irregular rows on 

 anal. 



METATACHINA MELLIFRONS, new species. 



Length, 7 mm. One female, Sebago Lake, Maine, September 8, 

 1914, on foliage (C. H. T. Townsend).^ 



Palpi straw-colored. Antennae blackish. Frontaha brown. Occi- 

 put silvery ; rest of head light golden pollinose. Thorax and abdomen 

 rather thickly silvery, with faint brassy tinge; four rather narrow 

 black thoracic vittae; first abdominal segment and irregular hind 

 borders of last three segments subshining dark brown, but first seg- 

 ment showing pollen in oblique view. Legs blackish. Wings clear. 

 Tegulae whitish. 



Type.— Csit. No. 22245, U.S.N.M. 



