198 THOMAS SAY FOUNDATION 



This mountain, locally called "Moscow Mountain," 

 is about 4,900 feet high and is part of a range desig- 

 nated on the map as Thatuna Hills, from which the 

 name of the species is derived, in commemoration of 

 many delightful collecting excursions by the writer. 



Holotype and Allotype. — Male and female, No. 

 20539, U. "S. N. M. 



No. 90. Sarcophaga elongata n. sp. 



So nearly like thatuna that it will suffice to indi- 

 cate the differences. 



Front .202 of the head (average of two, — .200 

 and 204) ; third antennal joint slightly shorter; for- 

 ceps dark brown at base, the rest shining black, grad- 

 ually diverging and curving forward to a slender, 

 tapering tip; anterior claspers more strongly curved 

 near the apex and with an oblique excision at the tip, 

 underneath which is a second point behind the main 

 one; the distal segment of the penis is of quite dif- 

 ferent shape, widening into a blunt tip from which 

 project some very short small processes, one pair of 

 which are whitish and have a delicate white fringe; 

 on the front side of the distal segment there are a 

 pair of large erect plates, dark along the edges, near- 

 ly transparent in the middle. They are connected 

 together by a delicate membrane on the apical side 

 and form a sort of expanded tip ; the middle and hind 

 tibise with dense villosity, that of the former com- 

 paratively short, and that of the latter very long. 



Length 14 mm. 



Two males; one is from Colorado, collection of 

 C. V. Riley in the National Museum ; the other speci- 

 mens from Jemez Mountains, N. Mex., July 5, 1914, 

 in the collection of Mr. Harbeck. 



Holotype.— Male, No. 20540, U. S. N. M., from 

 Colorado. 



No. 91. Sarcophaga occidentalis n. sp. 



Male. Very similar to thatuna, differing in the 

 following respects: 



