46 
Transactions of the Royal Society of South Africa. 
removal from the hive. The exit hole in the puparium consists of a rough 
tear and is apparently made by a ptilinum, for a well-marked ptilinal suture 
can be seen on the head of the adult. 
The Adtjlt Beaula caeca. 
The antennae of the adult recall both the muscid and the hippoboscid 
types (Fig. 4). They are lodged in deep cavities in the front of the head as 
in true hippoboscids, and remind one strongly of the antennae of Melophagus 
Figs. 9 10. — 9. Reproductive organs, female. 10. Reproductive organs, male. 
ot. Ovarian tubes, sp. Spermatheca. cod. Common ovarian duct. ov. Ovi- 
positor, te. Testis. ag. Accessory gland. cd. Common ejaculatory duct. 
pe. Penis. x 45. 
ovinus. The mouth-parts (Fig. 8) are peculiar, and do not resemble closely 
those of the muscid or the hippoboscid flies ; the task of making out the 
different parts is too involved for the present writer to attempt it. The foot 
also seems to be unique among the Diptera., for the tarsus is armed with two 
well-developed chitinous combs instead of the two simple claws usual among 
the Diptera (Fig. 5). 
The alimentary canal is of the usual type found among the higher 
Diptera. A narrow oesophagus leads to a small proventriculus (Fig. 11), 
behind which the canal branches, one branch leading into a large, thin-walled 
