Ko. 1935. MUSCOID FLIES FROM SOUTH AMERICA— TOWNSEND. 323 



Head wholly deep golden pollinose, the occiput with a slightly ashy 

 tinge, tergite of sixth segment shining, frontalia and antennae wholly 

 dark brown, palpi pale brownish-yellowish. Pleurae cinereous. Meso- 

 scutum light golden pollinose; the five vittse obscured in direct view, 

 the disk of thorax appearing mostly black, but quite well defined in 

 oblique view, the outer ones heaviest. Scutellum yellowish on apical 

 half, golden pollinose over all. Abdomen with anterior half of second 

 to fourth segments deeply golden pollinose, the golden rather widened 

 in middle and on sides. Hind borders of the segments shining dark 

 brown. Venter mostly ashy. Legs black, tibiae faintly brownish. 

 Wings clear, tegulae whitish. 



Type.— C&t. No. 15161, U.S.N.M. TD 4020. 



Genus ZYGOSTURMIA Townsend. 

 Zygosturmia Townsend, Ann. Ent. Soc. Amer., vol. 4, 1911, p. 142. 



With the characters of Zygohothria,, except that the parafacials are 

 perfectly bare, the facialia bare save for two or three bristles imme- 

 diately next vibrissas, and other points to be gleaned from the 

 description of type species, including a distinct facies. 



Reproductive habit, larviposition of uncolored maggots on or near 

 host. 



Type-species. — Zygosturmia inca Townsend. 



ZYGOSTURMIA INCA Townsend. 



Zygosturmia inca Townsend, Ann. Ent. Soc. Amer., vol. 4, 1911, p. 142. — 

 TD 4031. 



Length of body, 7 mm.; of wing, 5 mm. Two females, Sullana, 

 Peru, valley of Rio Chira, April 11 and 12, 1911, on foliage. 



Face and cheeks wholly silver}^, parafrontals famtly to deeply 

 brassy pollinose. Frontalia and antennae dark brown. Palpi dark 

 brown, brassy on tips. Occiput ashy. Pleurae, mesoscutum and 

 scutellum silvery pollinose, the pollen of last two with a faint brassy 

 tinge. Two inner posteriorly abbreviated thoracic vittae, an outer 

 one interrupted at suture. Scutellum slightly 3^ellowish on apex. 

 Abdomen blackish, the second and third segments silvery pollinose 

 except median line and rather narrow hind margm of each ; anal seg- 

 ment reddish-yellow, silvery on about basal one-half. Legs blackish. 

 Wings clear, tegulae whitish. 



Type.—CsA. No. 15162, U.S.N.M. TD 4031,/. r. s. 



