262 Mr. E. E. Austen on 
avicularia ; at any rate, the specimen called by Walker (List 
Dipt. iv. p. 1141) Olfersia Macleayt belongs to this species. 
Ornithomyia avicularia, van der Wulp (nec Linn.: Biol. 
Centr.-Amer., Diptera, vol. 11. (April 1903), p. 431), is in 
reality very distinct from O. avicularia, Linn., and belongs 
to Ornithomyia varipes, Walk. (List Dipt. iv. (1849), p. 1146), 
the type of which is from Colombia (Goudot). Other speci- 
mens of QO. varipes in the British Museum collection are: 
a female from Huamachuca, Peru, 3000 metres, Nov. 1899 
(Stmon) ; a second female from Orizaba, Mexico (Sal/é) ; 
and a third from the mountains of Molokai I., Sandwich Is., 
3000 ft., 12. v. 1893 (Perkins). The latter is the specimen 
mentioned by Speiser (‘ Fauna Hawaiiensis,’ Diptera, Supple- 
ment, p. 89). 
In‘ Természetrajzi Fiizetek,’ vol. xxv. (1902), pp. 327-331, 
Dr. Speiser divides the genus Ornithomyta into three genera, 
viz.: Ornithomyia, Latr., sens. strict. (typical species Hzppo- 
bosca avicularia, Linn.) ; Ornithoctona, gen. nov. (typical 
species Ornithomyia erythrocephala, Leach); and Ornitheza, 
gen. nov. (typical species Ornithomyia Gestrot, Rond.). 
O. varipes, Walk., would appear to belong to Ornitheza ; 
nevertheless Ornithomyia obscurata, Walk. (Journ. Proc. Linn. 
Soc. v. p. 270), from Tondano, Celebes (A. &. Wallace), 
which, in spite of the great difference in locality, appears to 
me to be probably identical with O. varipes, Walk., is assigned 
by Speiser (doc. cit. p. 829) to Ornithoctona. 
Ornithomyia robusta, v. d. Wulp (op. cit. p. 431, tab. xiii. 
figs. 5, 5a, 5b, 5c) =O. (Ornithoctona) erythrocephala, Leach. 
The shape of the antennary processes is better represented 
in the coloured figure (5) than in the outline drawing (5a). 
The five specimens are all females, and not as stated by 
van der Wulp. 
Ornithomyia pilosula, v. d. Wulp: op cit. p. 432, tab. xiii. 
figs. 6, 6 a.—This species closely resembles O. vartpes, Walk., 
in size and general appearance. The antennary processes, 
however, although large and lanceolate, are narrower than in 
that species, more elongate, and more pointed at the tips. 
Their apical halves are somewhat divergent, and the species 
should probably be assigned to the genus Ornitheza, Speiser. 
It is stated by van der Wulp that O. pilosula “ agrees in 
most respects with the European O. avicularia”; but the 
shape of the antennary processes is entirely different. ‘The 
figure of the head (tab. xii. fig. 6) is misleading, since it 
gives no idea of the true shape of the orbital margins, which, 
like those of O. varipes, are greatly expanded posteriorly. 
