NO. 2115. NEW NEOTROPICAL MV8C0ID FLIES— T0WN8END. 423 



wider than facialia. Facial plate deeply sunken. Oral margin cut 

 off, vibrissae on same. Frontalia not delimited by color from para- 

 frontals, all equally pollinose. Cilia of facialia very sparse. Pro- 

 boscis short and fleshy, palpi subcylindrical. Two sternopleurals and 

 three postsuturals. No median macrochaetae on first abdominal seg- 

 ment in female. Hind tarsi of female shorter than others, the hind 

 metatarsi shortened and thickened. Front tarsi of female not 

 widened. Apical cell almost closed in margin a httle before wingtip. 

 Small crossvein nearly opposite end of auxiliary vein, hind crossvein 

 well approximated to small crossvein, the last section of fifth vein 

 about as long as preceding section. First vein bristly whole length. 

 Costal spine small. No piercer in female. 



CHAETOPHLEPSIS TARSALIS, new species. 



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

 Casma, Peru, April 1, 1912, on cotton foUage during outbreak of Ala^ 

 bama argillacea (Townsend). 



Blackish in ground color, silvery-cinereous polhnose. Face and 

 cheeks silvery-whitish. Whole front including frontalia pollinose, 

 with pale golden tinge. Pollen of mesoscutum and scutellum faintly 

 golden. Thoracic vittae practically obsolete, only a faint trace of 

 linear median pair in front. Abdomen also with faint brassy tinge 

 to the pollen. Femora with faint bloom, tibiae reddish-fulvous, tarsi 

 black. Wings nearly clear, faintly yellow at stigma. Tegulae 

 watery- white. 



Holotype.— Cat. No. 19444, U.S.N.M. TD 4087. 



MICRONYCHIOPS, new genus. 



Genotype. — MicronycJiiops aurescens, new species. 



Runs to Micronychia in Brauer and Bergenstamm's tables, but 

 may be distmguished by the following characters : Ocellar bristles dis- 

 tinct but not large, proclinate. Proboscis shorter than head-height. 

 Eyes hairy. Vibrissae above oral margin, latter produced. Female 

 with inner and outer vertical bristles both strong, the inner ones 

 decussate. Two proclinate fronto-orbitals in female, and two 

 reclinate inner ones. Frontals strong like orbitals and verticals, 

 except anterior ones. Front of female about equal to eye-width. 

 Palpi long, slightly clavate. Third antennal joint about two and 

 one-half times second, latter hardly elongate. Arista thickened on 

 basal third, basal joints short. Two sternopleurals and three post- 

 suturals. Scutellum with two strong lateral macrochaetae, the 

 posterior one longer; long strong apical decussate pair, same length 

 as anterior lateral. Abdominal macrochaetae only marginal, long. 

 Segments three and four with marginal row, two with median marginal 



