53 
a propupa; though why it should do this is not clear. Neither is it 
possible with the limited material at hand to say whether the reversed 
position of the imago is abnormal or not. It is certain, however, that 
the pupa may also lie in its normal position with its head at the 
anterior pole of the puparium, as in dissecting out a number of puparia 
one imago was found in this position. 
Thus we have a very remarkable anomaly ; in the first instance the 
true larval stage is continued until after the formation of the 
puparium. and secondly, a large percentage of the flies escape back 
wards from the puparium. 
M usca spp. 
One species was taken on cattle at St. Louis, Senegal (May, 1903) ; 
another on cattle at Kasongo, and a third at Wanie Numbu. The 
specimens have, unfortunately, suffered somewhat from mould and art- 
therefore unsuitable for descriptive purposes. Two of the species are 
apparently new to science. 
A new Genus unci Species of Bloodsucking Fly, allied to Muse a 
Several specimens of these interesting flies were caught on cattle 
and donkeys at St. Louis, Senegal, May, 1903, and also at Zambie on 
the Congo in September of the same year. All the specimens 
captured were forwarded to the British Museum in 1903 and 1904. 
and a series of five were returned to this Institute. Mr. Austen lias 
given us to understand that he wishes to publish a description of this 
insect, and we await his publication* with interest. 
Lyperosia minutii, Bezzi 
Many specimens were caught on horses in a stable at Salikaine 
Creek, Gambia River. 
Mr. E. E. Austen considers these as a new sub-species, having 
darker legs than the typical forms. 
Lyperosia ! sp. 
Specimens of a species allied to the above were caught on camels 
at St. Louis, Senegal, in May, 1903. We have not been able to 
identify these ; but they are probably new. 
. * ^ r ' , Austen has now ijan. iX. 1907) very kindly promised to publish the dugn< -i 
this insect 111 an earlv number of this publication. 
