135 
the female one and one-half, times as long as the second; penul- 
timate joint of arista in the male four times, in the female 
slightly over twice, as long as broad; length, 10 to 12 mm. 
Franconia, K H.; Delaware County, Pa.; Maryland; northern 
Illinois, and Tifton, Ga. (In Scudder's Butterflies of New Eng- 
land, Vol. Ill, p. 1917 ; 1889 : Acroglossa. Pseudogonia ruficauda 
Townsend, Can. Entomologist. Vol. XXIV, p. G6; March, 1892. 
Pseudogonia obsoleta 1 Townsend, loc. cit.) hesperidarum Will. 
2. Third joint of antennae in the male from two to two and three- 
fourths, in the female from one to one and one-half, times as long 
as the second; penultimate joint of arista in the male from one 
and one- half to four, in the female one and one-fourth, times as 
long as broad; length, 11 to 12 mm. North Carolina; Georgia; 
Fernandina, Fla., and Austria. A female from Austria received 
from Brauer and Bergenstamm and by them labeled Cnephalia 
bisetosa 2 B. B. (Diptera Sueciae, Muscidae, p. 11; 1820: Tach- 
ina. The following synonymy is by Desvoidy in Annales Soc. 
Entomol. France, p. 317; 1851: Spallanzania gallica Desvoidy, 
Essai sur les Myodaires, p. 79; 1830. The following is by 
Kowarz in Wiener Ent. Zeitung, Vol. VII, p. 6; January 31, 
1888: Gonia nudifacies Macquart, Dipteres Nord France, Vol. V, 
p. 179; 1833. Isomera parisiaca Desvoidy, Annales Soc. Ento- 
mol. France, p. 315; 1851. Gonia cognata Rondani, Dipt. Italicae 
Prod., Vol. Ill, p. 38; 1859. Spallanzania alpestris Rondani, 
loc. cit., Vol. IV, p. 155; 1801. The following is by the writer: 
Cnephalia paiisa Snow, Kansas University Quarterly, Vol. Ill, 
p. 182; January, 1895.) hebes Fall. 
Third joint of antennae in the male eight times as long as the second, 
penultimate joint of his arista four times as long as bioad; 
black, the palpi and scutellum yellow; front of male twice as 
wide as either eye, the sides and face whitish pollinose and 
wholly covered with short inacrochaetae except a narrow space 
outside of the facial ridges, frontal bristles short, descending 
to the arista; cheeks slightly over one-half as broad as the eye 
height, facial ridges bristly on the lower four-fifths, antennae 
seven-eighths as long as the face, arista thickened almost to the 
tip; thorax gray pollinose, marked with four black vittse, scutel 
lum bearing three long marginal pairs and a short apical pair of 
inacrochaetae. abdomen gray pollinose and with reflectingblackish 
spots, second and third segments bearing marginal inacrochaetae, 
wanting on the first; front pulvilli two-thirds as long as the last 
tarsal joint; wings hyaline, third vein bearing five bristles at 
'The identity of ruficauda and obsoleta has already heen given by F. H. Snow in 
the Kansas University Quarterly, Vol. Ill, p. 183, from an examination of the type 
specimens. 
2 In the Zweif. Kais. Mns. Wien, VI, p. 222, Brauer and Bergenstamm state that 
Fallen's type specimen of hebes is identical with their bisetosa. 
