ART. 12 THE FLY GENUS SARCOPHAGA — ALDRICH 35 



but the second small, 'so it may go in the section with three, as the 

 other Acridiophagas do. Anterior acrostichal of quite striking 

 length; apical scutellars long, decussate, a little upcurved; second 

 abdominal without median marginals, one pair on third ; fourth ab- 

 dominal largely red in ground color. Genitalia as in Figure 14. 

 Runs in the keys in Sarcophaga and Allies to couplet 22 (p. 115), 

 if considered to have three dorsocentrals, and to couplet 13 (p. 246), 

 if considered to have four. 



Sarcophaga triplasia, p. 283, pi. 7, fig. 10. 



One male, three females. One female (Amula) has been indicated 

 as distinct by Major Austen. Excluding this the others seem to be 

 alike, and are the variety of fulvipes with black legs, described by 

 Parker as fulvipes var. dissidia.^^ Although the status of fulvipes 

 Macquart is a little uncertain, the close resemblance of the pre'sent 

 form to the species as identified by authors seems to justify calling 

 this a variety of it. 



Sarophaga tripartita, p. 284. 



One male. The same as Sarcophaga plinthopyga Wiedmann, 

 1830.55 



Sarcophaga pexata, p. 284. 



Four males, one female. Excluding two males of a different but 

 related species, I restrict the species to two males from Yucatan. 

 The female is probably a third species. As restricted the species 

 fits into the Paraphnssopodia group of Townsend, with hillifera, 

 etc. The nearest form in genitalic structure is otiosa Williston, 

 which however has much longer and narrower forceps, and lacks 

 the first pair of processes on the front side of the penis. Figure 15 

 shows the structure in pexata. 



Sarcophaga volucris, p. 285. 



Two males, of two species, both with striking genitalia as different 

 as possible. One (Teapa) is occipitalis Thomson {cotyledonea Al- 

 drich, auriharlata Townsend), and I exclude this, restricting the 

 species to the other, from Atoyac. There are four or more dorso- 

 centrals, only the hindmost two of normal size; hind tibiae thinly 

 but evidently villous both sides; genital segments red; first vein 

 bare ; no anterior acrostichals ; sternopleurals three ; apical scutellars 

 small but distinct. Back of head with two rows of black hairs be- 

 low, three above. Second abdominal segment without median mar- 

 ginals, third with one pair ; fourth segment yellow in ground color 



siCanad. Ent., vol. 49, 1917, p. 157, fig. 



^'Robusta Aldrich, Sarcophaga and Allies, 1916, p. 268; syn. by Aldrich, Annals Ent. 

 Soc. Amer. vol. 17. 1924, p. 210. 



