4 PROCEEDINGS OF THE NATIONAL MUSEUM vol. 74 



This species is so much like gigas in nearly all structural details 

 that I have considered the possibility that one is a color form of the 

 other. It is apparent that the color and venation are variable, but 

 the differences seem to be sufficient to make the species valid. 



Family ANTHOMYIIDAE 



Genus OPHYRA Robineau-Desvoidy 



Ophyra Robinelvu-Desvoidy, Myodaires, 1830, p. r»16. — Rondani, Dipt. Ital. 

 Prod., vol. 6, 1877, p. 34.— Van der Wui,p, Biologia, Dipt., vol. 2, 1896, 

 p. 323.— Stein, Archiv Naturgesch., vol. 83, 1917 (1919), p. 130.— Seguy, 

 Anthomyides de Franco, 1923, p. 277. — Malloch, Ann. Mag. Nat. Hist., 

 vol. 11, 1923, p. 664. 



Before describing a new species from Chile, I will notice the 

 species already known from South America. All the extra-European 

 species are listed by Stein in the article just cited by him. 



OPHYRA AENESCENS Wiedemann 



Anthomyia aenesccns Wiedemann, Auss. Zweifl., vol. 2, 1830, p. 435. 

 Ophyra argcnthia Bigot, Anuales, 1885, p. 302. — Giouo-Tos, Ditt, del Mess., 



vol. 4, 1895, p. 26.— Van der Witlp, Biologia, Dipt., vol. 2, 1896, p. 323. 

 Ophyra acnescens, Stein, Berlin Ent. Zeitschr., vol. 42, 1897, p. 170; Ann. 

 Mus. Nat. Hung., vol. 2, 1904, p. 451, and vol. 16, 1918, p. 234; Arch. 

 Naturgesch. vol. 76, 1911, p. 100, and vol, 84, 1918 (1920), p. 42; 

 Zeitschr. Hym. Dipt., vol. 7, 1907, p. 212. — Bishopp and Laake, Journ. 

 Agric. Research, vol. 21, 1921, p. 729. 

 Ophyra carbonaria Shannon and Del Ponte, Rev. Inst. Bacteriologico, 

 Buenos Aires, vol. 4, No. 5, 1926 (1927), pp. 20, 30. 

 This species may be distinguished from the others by having yellow 

 palpi and black knobs on the halteres ; it has a bronze tinge. It has 

 been reported from Northern Chile by Stein, 1911 (Caldera, Anto- 

 fagasta, Arica), and is known from Argentina, Brazil, Peru, etc., 

 north to the southern part of the United States. O. carbonaria was 

 recently described from Argentina. Bishopp and Laake, 1921, 

 report that in their experiments they found the adult to fly more 

 than four miles at the maximum from a point of liberation. I have 

 received no Chilean specimens of this species. 



OFIIYRA SETIA Walker 



Anthomyia setia Walker, List Dipt. Ins., vol. 4, 1849, p. 956. 

 Ophyra setia Stein, Zeitschr. Hym. Dipt., vol. 1, 1901, p. 208. 



This was described from a single female, collected by Darwin in 

 the Galapagos Islands. Stein on examining the type in the British 

 Museum reported that it is very like O. aenescens except in having 

 yellowish halteres. No other fc,pecimens have been reported, and 

 the male is unknown. However, the United States National Museum 

 has four males from the Galapagos Islands of undoubted 0. aenescens, 



