290 
Psyche 
[September 
Head, thorax and legs covered with pale yellowish pile. 
Wings subhyaline throughout, at most slightly yellow- 
ish at the base. Male: frons narrowed beneath the 
ocelli, but the eyes separated by about half the basal 
width of the ocellar triangle. Length, 8 to 11 mm. 
N. vitripennis (Wiedemann). 
Neorhynchocephalus volaticus (Williston) 
Rhynchocephalus volaticus Williston, 1883, Canad. Entom., 
XV, pp. 70 and 71, fig. 4 ( $ ; Florida) ; 1886, Trans. 
Amer. Ent. Soc., XIII, p. 293 ( $ ) ; 1888, “Synopsis 
North American Diptera,” p. 33, fig. C. W. Johnson, 
1895, Proc. Ac. Nat. Sci. Phila., XLVII, p. 325. Wil- 
liston, 1901, “Biologia Centr.-Amer.,” Dipt., I, p. 269. 
Aldrich, 1905, “Cat. North Amer. Dipt.,” p. 219. Cock- 
erell, 1908, Trans. Amer. Ent. Soc., XXXIV, p. 250. 
Williston, 1908, “Manual of North American Diptera,” 
3d Ed., p. 186, fig. 68. Kertesz, 1909, “Cat. Dipt.,” IV, 
p. 30. 
Neorhynchocephalus volaticus Lichtwardt, 1909, Deutsch. 
Ent. Zeitschr., p. 512; 1910, Loc. cit., p. 593, fig. 2. C. 
W. Johnson, 1913, Bull. Amer. Mus. Nat. Hist., XXXII, 
p. 54. F. M. Hull, 1923, Ent. News, XXXIV, p. 275 
( 9 ) • 
Rhynchocephalus (N emestrinopsis) volaticus , Cockerell, 
1910, Bull. Amer. Mus. Nat. Hist., XXVIII, pp. 285 
and 286. 
Rhynchocephalus species, Osten Sacken, 1886, “Biologia 
Centr.-Amer.,” Dipt., I, p. 73 ( $ ). 
Specimens Examined. — Florida: one female (holotype) 
and two other females, without more definite locality (Riley 
Coll. — U. S. Nat. Mus.) ; St. Augustine, one male (C. W. 
Johnson Coll.) ; Georgiana, one female (Whitfeld Coll. — 
U. S. Nat. Mus.). Texas: one female and one male, with- 
out more definite locality ; Cotula, one female, May 12, 1906 
(J. C. Crawford Coll. — -U. S. Nat. Mus.) ; two males, 
labelled “Neucest” (Marlatt Coll.— IT. S. Nat. Mus.) ; Ray- 
