ART. 12 THE FLY GENUS SARCOPHAGA — ALDRICH 37 



tiguous at tip, and have a distinct concavity behind in the middle, not 

 reaching the sides; they are yellow, and at tip there is a transverse 

 black flattened diagonal margin, from about the middle of which 

 on each side a minute tooth projects backward. See Figure 18. I 

 <?an not match this species in the United States National Museum. 



Enderlein has designated this species as type of his new genus 

 Ctenoprosbollia?'^ It seems to me that the genus is a synonym of 

 Oxysarcodexia Townsend, and this has not much more than group 

 standing. 



WILLISTON'S SARCOPHAGAS 



IN TRANSACTIONS OF THE ENTOMOLOGICAL SOCIETY OF LONDON, 1896 



Sarcophaga tnicropygialis, p. 363. 



Nine males. Postsutural dorsocentrals four; hind tibiae not vil- 

 lous; genital segments black; first vein bare; middle femur not with 

 comb ; cheek with pale beard before the metacephalic suture. These 

 characters come out at servilis Aldrich on page 236 of Sarcophaga 

 and Allies, but the species is distinct on genitalic characters. Geni- 

 talia as in Figure 19. The penis is yellow, slender, elbowed, and 

 greatly surpasses the forceps, which are small, blackish, flat behind, 

 the apices narrow and not divaricate. 



Sarcophaga concinnata^ p. 364. 



Three males, one female. As Williston says, this is just like otiosa 

 except in not having villosity on hind and middle tibiae, and in 

 being smaller. I was surprised to find that the similarity extends 

 to the genitalia, which seem identical. It is doubtful if this can be 

 regarded as more than a variety of otiosa. 



Sarcophaga otiosa., p. 364. 



Three males, one female. AVilliston retained a pair of the cotypes, 

 which ultimately passed to the American Museum of Natural His- 

 tory, where I found them and published a description in Sarcophaga 

 and Allies (1916, p. 213, fig. 101). My sketch of the genitalia was 

 a poor one, and I here add in Figure 20 one which is a little better. 

 The species is close to pexata Van der Wulp, but the forceps are 

 much more slender with the outer concavity very small, and the penis 

 lacks the first pair of anterior appendages occurring in the latter. 



Sarcophaga pavida., p. 365. 



Two males, one female. A synonym of sternodontis Townsend, a 

 very widespread tropical and subtropical species; I redescribed it 

 in Sarcophaga and Allies (1916, p. 265, fig. 127). In the Williston 



" Arcb. f. Klass. u. Phyl. Ent., vol. 1, 1928, p. 28. 



