44 Proceedings of the Biological Society of Washington. 



Squamae longer than wide. No median macrochaetae on second abdomi- 

 nal segment; fairly strong macrochaetae on third. Male hypopygium 

 small, the forceps minute. First hypopygial tergite of female incised. 

 Arista only short-plumose half way. Male tibiae not villous. 



In the genotype the hind legs of the male are remarkably specialized for 

 grasping the female, the tibia being shortened to fit against heavy spine- 

 brushes or pads on the flexor surface of the femur. A male was taken 

 by myself on Manzanares Creek, in the Pecos Forest Reserve, New- 

 Mexico, at about 7500 feet, on carpet of short herbage on hillside in open 

 pine forest, August 30, 1916. The abdomen is bright silvery pollinose ; 

 with a median vitta, and a waved vitta on each side of same, black. S. 

 insurgens Aid. is evidently a male of incurva in which the development 

 of the sexual character of the hind legs was arrested soon after inception. 

 A female which I regard as congeneric was taken by myself near Fran- 

 conia, New Hampshire, July 24, 1915. 



Titanogrypa new genus. 



Genotype, Sarcophaga melampyga var. alata Aldrich, op. cit. , 109-10, 

 raised hereby to specific rank. 



Differs from Sarcophaga as follows: Vibrissal axis much less than 

 head-height. Clypeus rather narrowed, but the vibrissae well separated. 

 Proboscis longer than head-height. Arista short-plumose half way. Eyes 

 descending low, the cheeks little over one-fourth eye-length. Male ver- 

 tex fully three-fourths eye, that of female hardly as wide as eye. Fron- 

 talia and parafrontalia not narrowed posteriorly, nearly or quite equal to 

 each other in width in both sexes. Outer verticals long and strong in 

 male. Two reclinate fronto-orbitals in both sexes. Frontals diverging 

 one bristle below base of antennae. Parafacialia little over half as wide 

 as clypeus. Facio-orbitals in row of microchaetae only. Postsuturals 

 three. Lateral scutellars two, no discals; between the two laterals on 

 each side the edge of scutellum is furnished in both sexes with a thick 

 patch of short specialized hairs. Costal spine strong. First vein bristled 

 half way, the third to small crossvein. Squamae longer than broad. 

 None of male tibiae villous. Long strong erect median marginals on in- 

 termediate abdominal segments in both sexes, anal segment with a 

 median discal pair in front of marginal row. Male claws only a little 

 elongate. Male hypopygium rather small. First hypopygial tergite of 

 female concealed within a long and narrow vertical slit formed by anal 

 segment and bordered with decussate bristles. 



A long series of both sexes of this species was taken by Mrs. Townsend 

 and myself at Miami, Florida, in 1908. Many females were dissected — 

 TD517, 586, 1325, 1328, etc. The first-stage maggot possesses a most 

 astonishing development of the oral portions of the cephalopharyngeal 

 skeleton, unlike anything so far known. The generic name refers to this 

 character. The allotype of S. melampyga Aid., from Key West, Fla., is 

 this species. 



