Townsend — New American Muscoid Diptera. 45 



Wohlfahrtiopsis new genus. 



Genotype, Sarcophaga johnsoni Aldrich, op. cit. , 162-5. 



Differs from Sarcophaga as follows : Clypeus narrower, proboscis dis- 

 tinctly exceeding head-height. Arista short-plumose two-thirds to three- 

 fourths way. Male vertex fully as wide as eye, that of female wider. 

 Frontals weakly divergent at base of antennae. Frontalia very broad, 

 not narrowed. Parafacialia broader than clypeus, with hairs of even 

 strength in irregular rows. Cheeks fully three-fifths eye-length. Post- 

 suturals two. Squamae conspicuously longer than broad. No median 

 marginals on segment two of abdomen. First hypopygial tergite of 

 female incised. 



A very marked form approaching Wohlfahrtia in head characters, and 

 confined to sea beaches. 



Rafaelia new genus. 



Genotype, Rafaelia rufiventris new name for Sarcophaga rufiventris 

 Aldrich, op. cit., 150-1 (nee Wiedemann, 1830, Auss. Zweifl. II, 362). 



Differs from Johnsonia Coq. in hind crossvein being about half way 

 between small crossvein and cubitus, costal spine strong, first and third 

 veins partly bristled but the fifth bare, male without proclinate orbitals, 

 female with two such, both verticals developed in both sexes, ocellars 

 strong, and no median macrochaetae on second abdominal segment. 

 Clypeus narrow, epistoma cut off. Frontals stopping at base of antennae. 

 Tarsi elongate and thickened, especially those of female. Vibrissal axis 

 shorter than antennal axis. Frontal profile bulged. Face only gently 

 widened from front in both sexes, the male front only a little narrower 

 than that of female. Macrochaetae strong. The apical cell is closed and 

 more or less distinctly short-petiolate. 



The species is founded on a male and a female taken by myself at San 

 Rafael, near Jicaltepec, on the Rio Nautla, State of Veracruz, June 20, 

 1896. They were labeled by Coquillett " Helicobia rufiventris Wied." 

 with a query, but do not agree with Wiedemann's description. The form 

 belongs unmistakably on external characters to the Johnsonia group-unit. 



Holotype, No. 20,947 U. S. N. M., female; allotype, male. 



Glaucosarcophaga new genus. 



Genotype, Glaucosarcophaga knabi new name for Sarcophaga villipes 

 Aldrich, op. cit., 178-9 (nee Wulp, 1895, Biologia C.-A., Dipt. II, 269). 



Differs from Sarcophaga as follows : Vibrissal axis hardly three-fifths 

 head-height and distinctly shorter than antennal axis. Epistoma but 

 slightly projected beyond vibrissae, moderately wide, somewhat warped 

 forward from plane of clypeus. Proboscis barely one-half head-height. 

 Arista rather short-plumose on little over basal half. Female vertex 

 fully equalling or exceeding eye, the front nearly equilateral. Frontals 

 not divergent, stopping at base of antennae. Frontalia very wide, not 

 narrowed, widening posteriorly, being in middle about two and one-half 

 times as wide as one parafrontal. Ocellars strong. Parafacialia two- 



