No. 2301. NEW SPECIES OF MUSCOID FLIES— TOWNSEND. 545 



bluish, thinner, and indefinite on their posterior borders in varying 

 lights. Wings clear. Tegulae white. 

 Type.— Cat. No. 22090, U.S.N.M. 



Tribe MICROCHAETININI. 

 HYPENOMYIA, new genus. 



Genotype. — Hypenomyia petiolata, new species. 



Clypeus narrow, a little sunken. Epistoma narrow, elongate, 

 warped gradually forward from clypeal plane. Facialia bare. Two 

 strong decussate pairs of vibrissae, the lower pair stronger and near 

 oral margin. Proboscis about head height; palpi slender. Third 

 antennal joint one and one-half times second. Arista short-plumose. 

 Eyes bare. Frontals stopping at base of antennae. No proclinate 

 fronto-orbitals in male. Ocellars present. Parafacialia wider than 

 clypeus, short-setose. Cheeks one-half eye length. Three to five, 

 normally four sternoplem-als ; three postintraalars, postsuturals, 

 and postacrostichals; two preacrostichals and lateral scutellars. 

 A long decussate apical scutellar pair. Costal spine extremely long. 

 Third vein bristled only at base, others bare. Cubitus near middle 

 of wing breadth, with long and strong stump, the apical crossvein 

 strongly sinuate. Apical cell petiolate, ending far before tip, petiole 

 as long as small crossvein or longer and about in line with third vein. 

 Hind crossvein not far from middle or considerably nearer to cubitus. 

 Median discals on intermediate segments. Male claws very long. 



BTYPENOMYIA PETIOLATA, new species. 



Length, 8 to 9 mm. Two females, East Verde River, Arizona, 

 4,200 feet, October 3, 1917 (C. H. T. Townsend); and both sexes, 

 Los Angeles County, California (Coll. Coquillet). 



Blackish, thinly cinereous pollinose. Head rather thickly silvery; 

 frontalia, antennae and palpi brown. Thorax showing four more or 

 less distinct dark vittae. Hind borders of last three adbominal 

 segments brown in increasing width posteriorly, the anal segment 

 being half brown. Tegulae watery-white. Wings nearly clear; 

 narrowly brown at base of third vein, and on small, apical and hind 

 crossveins. 



Type.— C&t. No. 22210, U.S.N.M. 



Tribe MYIOPHASHNI. 

 MEGAEULOEWIA, new genus. 



Genotype. — Megaeuloewia morinioides, new species. 



Vibrissal axis equal to antennal axis, about five-sixths of head 

 height. Facial profile little over three-fifths of frontal. Cljrpeus 

 little sunken, bent in middle in profile, the lower part warped forward 

 115690— 19— Proc.N.M.vol.56 35 



