INSEJCUTOR INSCITI^ MENSTRUUS 161 



cHnate fronto-orbitals weak and short, the reclinate one strong. 

 Parafacialia fully as broad as clypeus. Cheeks less than one- 

 half eye-length. No facio-orbitals, the parafacialia with only 

 microscopic pubescence. Only two postsuturals ; two strong 

 postacrostichals. Costal spine absent. First vein bristled about 

 halfway. Squamae longer than wide. No median marginals 

 on second abdominal segment, short weak pair on third seg- 

 ment. Female hypopygial tergum excised, bordered with 

 bristles. Genotype, Raviniopsis aurea, n. sp. 



'Raviniopsis aurea, new species. 



Length of body, 6.5 to 9 mm. ; of wing, 5 to 6.5 mm. Two 

 females: Piura, Peru, June 19, 1910 (Townsend) ; and Alha- 

 juelo, Panama, April 10, 1911 (Busck). Holotype, No. 21583, 

 U. S. Nat. Mus. ; TD 3903, Piura, Peru. 



Antennae and palpi blackish, frontalia light brown. Head, 

 whole body, and femora silvery pollinose with a pronounced 

 golden shade. The marmorations of abdomen show as a nar- 

 row median line, a heavy spot laterally on each segment ap- 

 proximated to hind border, another approximated to front 

 border between the lateral one and the median line. Hypo- 

 pygium reddish-yellow. Tegulse watery-white. Legs brown- 

 ish-black. 



Sarcophodexia, new genus. 



Differs from So.rcophaga as follows : Male. Proboscis 

 shorter than head-height. Arista plumose a little over half- 

 way. Eyes large in front view. Outer verticals distinctly 

 stouter but little longer than occipital fringe. Parafacialia 

 little over half as wide as clypeus, with short bristles on outer 

 half or so. Cheeks about one-half eye-length. A strong pair 

 of postacrostichals, and a strong pair of discal scutellars. 

 Squamae longer than broad. Hind tibise not villous. No 

 median marginals on second abdominal segment. Genotype, 

 Sarcophaga hamata Aid., Sarc. and Allies, 272 (1916). 



Amblycoryphenes, new genus. 



Differs from Sarcophaga as follows : Female. Proboscis 

 little over half head-height. Eyes large. Vertex about two- 



