10 PROCEEDINGS OF THE NATIONAL MUSEUM vol.78 



Eedescribed from 60 specimens : 25 taken by C. H. Curran, 2 by 

 S. W. Frost, 1 by Nathan Banks, and 2 by K., C. Shannon, all on 

 Barro Colorado Island, Canal Zone; 1 Frijoles, Canal Zone, by 

 Nathan Banks ; 1 at Tabernilla, 1 at Lion Hill, Canal Zone, collected 

 by August Busck; 1, Cano Saddle, Gatun Lake, Canal Zone, by K.. 

 C. Shannon; 2 from Paraiso, Panama, from J. Zetek; 2 from Lom- 

 bardia, Honduras, collected by W. M. Mann; 10 from La Suiza de 

 Turrialba, Costa Rica, collected by Pablo Schild and received from 

 Prof. A. L, Melander; 11 from Higuito, San Mateo, Costa Rica, col- 

 lected by Pablo Schild; 1, Trece Aguas, Alta Vera Paz, Guatemala, 

 collected by Schwarz and Barber. 



Townsend described the species from six male and eight female 

 specimens taken near San Rafael, Vera Cruz, Mexico. None of his 

 types of stylosa^ ethiopa^ and 7ninuta are in the National Museum, 

 nor are they in the University of Kansas. Krober mentions one co- 

 type of stylosa and one of ethiopa in the Bezzi collection, now in 

 the museum in Milan. Mr. Edwards, in reply to an inquiry, says 

 that the British Museum has two or three of each of the species, 

 presumably types, though not so marked. I am unable to trace the 

 remainder of the type material of the three species. 



STYLOGASTER BIANNULATA Say 



Myopa iiannulata Say, Journ. Acad. Nat. Sci. Phila., vol. .3, 1823, p. 81; 

 Complete Works, vol. 2, 1859, p. 72. 



Myopa stylata Wiedemann, Aussereur. Zweif. Ins., vol. 2, 1830, p. 243 — 

 RoEDEi!, Wien. Eiit. Zeit., vol. 11, 1892, p. 287. 



Styloyaster stylata Macquart, Dipt. Exot., vol. 3, pt. 2, 1843, p. 175 (sepa- 

 rate p. 18), pi. 2, fig. 3.— OSTEN Sacken, Cat. N. A. Dipt.. 1878, pp. 

 140, 259. 



Sfylomyia confusa Westwood, Proc. Zool. Soc. Loud., vol. 18, 1850, p. 271, 

 pi. 19, Mg. 4. (Syn. by Loew, Schaum's Juhresbericht, 1851, p. 133.) 



Styloyaster hianmilata V\'illiston, Trans. Conn. Acad., vol. 6, 1883, p. 93; 

 vol. 6, 1885, p. 394, pi. 61, fig. 8; Kans. Univ. Quart., vol. 1, 1893, p. 

 120.— Snow, Kans. Univ. Sci. Bull., vol. 2, 1903, p. 216.— Tucker, Kans. 

 Univ. Sci. Bull., vol. 4, 1907, p. 99.— Johnson, Ann. Kept., N. J. Statu 

 Mus., 1909 (1910), p. 772; Bull. Amer. Mus. Nat. Hist, vol. 33, art. 3, 

 1913, p. 69.— Petekson, 111. Biol. INIouographs, vol. 3, 1916, fig. 359.— 

 Britton, Check-list Ins. Conn., 1920, p. 189. — Johnson, List. Dipt. New 

 England, 1925, p. 180.— Johannsen, List Ins. New York, 1928, p. 803. 



Male. — Front rather wide, triangle shining brown, except in cen- 

 ter, reaching to middle of front ; lower third of front yellow, which 

 extends farther up along the sides ; antennae yellow, tip of third joint 

 brown; second joint on outer side about as long as third (in one speci- 

 men only three-fourths as long). Thorax yellow, the dark mesonotal 

 spot smaller than usual, well-defined, widely separated from lat- 

 eral margins and deeply notched behind. Mesopleura with only a 

 faint brownish mark above, which is not connected with the dorsal 



