298 Miss G. Ricardo on the Pangonine 
*G. ater, g, Saunders, J. c. pl. v. fig. 4; 9, Saunders, /. c. 
iv. p. 233, pl. xiv. fig. 33 (1847); Walker, List Dipt. 
i, p. 209 (1848), pt. v. p. 293 (1854); Loew, Dipt. 
Siidafrik. p. 15 (1860); Wulp, Cat. Dipt. S. Asia 
(1896). 
One male from Barrackpore, Calcutta (Rothney), 82. 15 ; 
one male from India (Saunders Coll.), 54. 18; one female 
from Bengal, 42. 25 (Campbell) ; one male (Saunders Coll.), 
68. 4. 
Saunders described and figured both the sexes ; the male 
type he mentions as belonging to a Colonel Hearsey, so that 
it seems probable that the Museum does not possess the 
male type, and certainly not the female type. There are 
said to be three specimens labelled Saunders Coll. im the 
Oxford Museum, which may perhaps include the types. 
Curysors, Meigen. 
Chrysops, Meigen, Ilig. Mag. ii. p. 267 (1803) ; Loew, Verh. zool.-bot. 
Gesell. Wien, viii. p. 613 (1858) ; id. Dipt. Siidafrik. pp. 16, 27 
(1860). 
Nemorius, Rondani, Prodrome Dipt. Ital. i. p. 171 (1856). 
The same remarks as to the tables for the identification 
of the species in the genus Si/vius will also apply here, 
especially as regards the South-American species. For the 
characters of the genus Loew should be consulted in the two 
works mentioned above. 
Nearctic Region. 
On the species of Chrysops from this part of the world, 
see Osten Sacken’s “ Prodrome” in ‘ Memoirs Boston Society 
Natural History,’ 11. (1876), in which is a most useful synop- 
tical list, his ‘Western Diptera’ (1877), his ‘ Catalogue 
of North American Diptera’ (1878), Williston in ‘ Transac- 
tions Kansas Academy,’ x. (1885), and others. 
Walker seems to have fallen into hopeless confusion over 
the species of Chrysops he described from North America, 
and Osten Sacken, not having the types themselves before 
him, was naturally not always correct in his attempts at 
rectifying Walker, as he himself anticipated; but though 
some of his species must now give way to Walker’s, his 
descriptions still hold good, and should be consulted rather 
than those of Walker. I append a list of the species 
described since the publication of Osten Sacken’s Catalogue, 
and of those whose synonymy must now be altered, chiefly 
