1910.] DR. R. T. LEIPER OX ENTOZOA. 147 



whilst, moreover, there are a good many species of an allied 

 genus (Haplochilus) distributed all over the West Coast of Africa, 

 and all of which feed freely on the larvae of the mosquito." — 

 J. A. M. Vipan. 



The Secretary added that whilst he shared Captain Vipan's 

 scepticism as to the efficacy of attempts to suppress malaria by 

 importing " Millions" and endeavouring to establish them in new 

 localities, he had thought it right for the Society to assist any 

 experiments that were being made. The Agricultural Department 

 of Barbados had arranged to send from time to time consignments 

 of " Millions " to the Zoological Gardens, and supplies of the fish 

 had been sent through the Colonial Office to various tropical 

 colonies. So far as he was aware, there had as yet been no 

 practical results. 



The Secretary, on behalf of Col. Sir A. H. McMahon, K.C.I. E., 

 C.S.I., F.Z.S., exhibited some specimens of the Cicada (Sena 

 qucerula) collected at Quetta, Baluchistan, which had been visited 

 with great swarms of these insects in 1909. Similar swarms had 

 been known to occur at intei'vals of about six years. The Cicada 

 bores a hole in the ground, apparently intended merely to hold 

 the insect during its pupa stage. Each hole is separate and quite 

 open, holds only one pupa, and is bored vertically to a depth 

 varying from 1 1 inches to 2 feet. In diameter it is about half an 

 inch, but widens slightly at the bottom. 



Dr. R. T. Leiper, F.Z.S., exhibited a series of specimens of 

 Entozoa, viz. : — 



(a) A sexually mature Guinea worm (Dracunculus medinensis) 

 that had recently been found by Mr. Charles Grey in a leopard 

 at Broken Hill, N.W. Rhodesia. Guinea-worm is normally a 

 parasite of man, but very occasionally it attacks horses and dogs. 

 This is the first record of its occurrence in the leopard. The 

 discovery of the parasite in Rhodesia is also of considerable interest, 

 for the Equator forms the southern limit of the endemic area of 

 the disease amongst the natives of Africa. 



(b) A Nematode from the body-cavity of the Tsetse-fly [Glossina 

 palpalis), found by Dr. A. Gray, R.A.M.C, at Entebbe. The 

 specimen, three inches in length, is an immature female Mermis. 



(c) A series of round worms from horses that had lived in 

 London for several years. The specimens included : — Ascaris 

 megalocephala, Oxyuris curvula, Strongylus equinus, Strongyhis 

 edentatus, Strongylus vulgaris (developmental forms of this worm 

 causing aneurisms of the abdominal aorta), Triodontophorus serra- 

 tus, Gycdocephalus capitatus, Cylichnostomum elongatum, Cylichno- 

 stomum sp. n. The Sclerostomum tetracanthum Mehlis was absent. 

 The parasites were prasent in considerable numbers, and it seemed 

 evident that they reached London as semi-dried larva? encj'sted 

 upon hay. 



10* 



