202 THOMAS SAY FOUNDATION 



near the tip; attached on the front side before the 

 middle of the distal segment are a pair of broad 

 plates, mostly blackish in color. 



Length 16 mm. 



Two males, Golden, Colo., June 10, 1898. One 

 from Prof. Hine and the other from the Hough 

 collection. 



Holotype. — Male, in Professor Hine's collec- 

 tion. 



No. 94. Sarcophaga gracilis n. sp. 



Male. Front .183 of head (one specimen). Ex- 

 ceedingly close to thatuna in all of its characters, 

 except that the tibiae are all much more strongly 

 villous, as in iJ 67' sine ax; also the genitalia show de- 

 cisive differences. The forceps are slender, widely 

 divergent, and very higly polished; claspers as in 

 perspicacc, except that the anterior pair are red; dis- 

 tal segment of penis strikingly small in comparison 

 with all the rest of the thatuna group, not with any 

 striking prolongations beyond the central part; on 

 the front side with a deeply concave plate developed 

 into rather thickened lobes at the sides not extend- 

 ing much beyond the body of the segment, but the 

 tips turned a little back. 



Length 13 mm. 



One male, Colorado 2019. In Hough collection, 

 received from Colorado Experiment Station. 



Holotype. — In Hough collection. 



No. 95. Sarcophaga securifera Vill. 



Villeneuve, Mittheilungen aus d. zool. Mus. Berlin, iv, 



123, fig. — Canary Islands. 

 Bottcher, Deutsche Ent. Zeitsch., 191 3, 15 and 370, fig. 



— Europe. 



Male. Front .230 of head (average of five, — 

 .223, .226, .226, .229, .247). Gray pollinose; para- 

 frontals and parafacials and orbit of the eye with 

 a distinctly yellow cast; frontals about 11 in num- 

 ber, some of the upper ones very weak, the rows sud- 

 denly diverging below, reaching the middle of the 



