Hippoboscide: tn the British Museum. 261 
species, in Fepruary 1901, by Mr. P. 8. Stammwitz on him- 
self, after carrying with him on his horse a dead * Duikerbok ” 
(? Cephalophus sp.), which he had shot. The occurrence of 
the European Lipoptena cervt in South Africa is certainly 
remarkable, but having carefully compared this specimen 
with others (presented by the late J. C. Mansel-Pleydell) 
from Whatcombe, Dorsetshire, from roe-deer, I am satisfied 
as to its specific identity. Of course, it is possible that the 
Lipopiena may originally have come from a horse, and not 
from the Duiker. At the time referred to, Mr. Stammwitz 
was serving in the South-African Constabulary, and the horse 
that he was riding when carrying the Duiker was an 
“ Argentine,” so that it is scarcely likely that the Lipoptena 
came from this particular horse. But it is conceivable that 
some time during the late South-African Campaign these flies 
or their parents may have been introduced with remounts 
from Europe. Although normally parasitic on roe- and red- 
deer and on elk *, Lipoptena cervi sometimes strays on to 
horses. The Museum collection includes a specimen from 
Whatcombe, Blandford, Dorset (J. C. Mansel-Pleydell), 
which was ‘‘ taken from a horse after passing through hazel- 
bushes ”’ in a wood frequented by roe-deer, on Oct. 17, 1895. 
As we know, various species of Hippobosca are capable 
of existing on more than one species of host, and it is just 
possible that specimens of Lipoptena that have strayed on to 
horses may afterwards be carried with them to other countries. 
If this explanation is not the true one in the present case, it 
may be suggested as an alternative hypothesis that Lépoptena 
cervt has been a parasite of African antelopes as well as of 
Kuropean deer since the Tertiary period, when, as is well 
known, direct land-connection existed at various times between 
Europe and Northern Africa. 
In addition to Lipoptena cervi, the Museum collection 
includes two specimens of a distinct and much smaller species 
which is as yet undetermined, from Orizaba, Mexico (Sallé). 
ORNITHOMYIA, Latr. 
Ornithomyia avicularia, L.—Ornithomyia remota, Walk. 
(List Dipt. iv. (1849), p. 1144), from Tristan d’Acunha, and 
OV. opposita, Walk. (¢bed. p. 1145), trom New Zealand, are 
synonyms of O. avicularia, Linn. Feronia Macleay?, Leach 
(loc. cit. p. 558), is also in all probability a synonym of O. 
* Of. J. P. BE. F. Stein, “Zur Naturgeschichte der Lausfliege, Zepoptena 
cervi, Nitzsch,” Deutsche entomologische Zeitschrift, Jahrg. xxi. (1877), 
pp. 297-298, 
