NOTES ON THE MYIASIS-PRODUCING DIPTKKA. 247 



Oestrus aurco-argentatus, Rodh. & Beq. — The larvae of this species are common 

 in the nasal passages of the roan antelope, Hippotragus equinus, and its local races, 

 and in the western and Jackson's hartebeest. 



Oestrus macdonaldi , Ged. — The larvae of this somewhat rare species have so far 

 only been found in the nasal passages of Lichtenstein's hartebeest, Biibalis 

 lichtensteini. 



Oestrus interruptns. Ged. — The mature larva of this species is parasitic in the 

 nasal passages of Coke's hartebeest, Bubalis cokei, the brindled gnu, or blue wilde- 

 beest, Connochoetes taurinus johnstoni, and the bastard hartebeest, Danialiscus 

 lunatus. 



Oestrus disjunctus, Ged. — The larva of this species is parasitic in the nasal 

 passages of the bastard hartebeest, and the roan antelope. 



Oestrus compositus, Ged. — The larva of this species is found in the nasal passages 

 of Lichtenstein's hartebeest. 



Rhinoestrus purpureus, Brauer. — This species, the larvae of which are parasitic 

 in the nasal passages of the horse, the mule and zebra in Europe, Asia Minor, Palestine 

 and Africa, is an important Oestrid, as the female fly has the habit of depositing 

 its larvae in, or near, the human eye, and may thus lead to the loss of an eye. It is 

 probably the larvae of this species that has been confused with that of Oestrus ovis 

 in those cases in which the latter has been recorded from the human face. 



Rhinoestrus phacochoeri, Rodh. & Beq. — The larva of this rare species is found 

 in the nasal sinuses of the warthog, Phacochoerus aethiopicus, in the Belgian Congo ; 

 the adult fly is not known. 



Rhinoestrus mvarleti, Rodh. & Beq. — The larvae of this species are parasitic 

 in the nasal sinuses of the red river-hog, Potomochoerus porous, in the Belgian Congo 

 and adjacent parts of West Africa ; the adult fly is not known. 



Rhinoestrus hippopotami, Griinberg. — -The larvae of this interesting Oestrid, 

 the only species known from the hippopotamus, is parasitic in its nasal cavities. 



Gedoelstia cristata, Rodh. & Beq. — The larvae of this species are found in the 

 nasal cavities of various antelopes such as Lichtenstein's hartebeest, the western 

 hartebeest, Jackson's variety of the Lelwel hartebeest, the white-bearded race of 

 the blue wildebeest, and the topi or variety of the Senegal hartebeest. 



Gedoelstia hdssleri, Ged.- — The larvae of this species are parasitic in the nose and 

 accessory sinuses of Lichtenstein's hartebeest and the bastard hartebeest. 



Kirkioestrus surcoufi, Ged.— The larvae are parasitic in the nasal cavities of the 

 western hartebeest, Jackson's hartebeest, and species of the lechwe in various parts 

 of West Africa. 



Kirkioestrus blanchardi, Ged. — Its larvae are parasitic in the nasal cavities of 

 Lichtenstein's hartebeest in the basin of the Zambesi. 



Kirkioestrus minutus, Rodh. & Beq. — The larvae of this species are parasitic in 

 the nasal cavities of Jackson's hartebeest and the topi, in the Congo. 



Cephalopsis titillator, Clark [Cephalomyia maculata, Macq.). — The larvae of this 

 species, the only bot-fly of the Camelidae, is parasitic in the naso-pharynx of the 

 dromedary and the camel, wherever these animals are found. 



3. Subfamily Cobboldiinae. 



The stomach-bots of the Indian and African elephants are placed in this 

 subfamily, and there seems little doubt that they are near allies of the equine 

 stomach-bots, the Gasterophilinae. 



