294. Bibliographical Notice. — Geological Society. 



BIBLIOGRAPHICAL NOTICE. 



Third Annual Report of the Committee of Control of the South 

 African Central Locust Bureau. Respectfully submitted by tbe 

 Committee to the several Governments supporting the Bureau. 

 Prepared for publication and edited by Chas. P. Lounsbury, 

 Government Entomologist, Cape of Good Hope. 8vo. Cape 

 Town, 1909. Pp. 68. 



The above-mentioned Bureau was established by the joint action of 

 the several British colonies and territories of South Africa in 1906, 

 after the country had -been ravaged by locusts for twelve or fifteen 

 consecutive years ; and it is now supported by all the British 

 territories, as well as by Mozambique and German South-west 

 Africa. The Report before us deals with the locust season of 

 1908-9. Although a great number of species of locusts inhabit 

 South Africa, it appears that the two principal destructive species 

 are Pachytylus rubricollis, Still, and Cyrtacanikacris septemfasciata, 

 Serv., called here respectively the Brown- and the Red-winged 

 Locusts. The former, the oldest name for which is Pachytylus 

 pardalinus, Walker, is congeneric with the real Pachytylus miyra- 

 torius of Linnaeus ; the latter belongs to a different section of the 

 true Locusts or Short-horned Grasshoppers. Both species have 

 latterly been much less destructive than formerly, owing to the 

 energetic measures taken against them ; and even on the Zambesi, 

 where the Red-winged Locust is very destructive and less effectually 

 combated than in the south, it is estimated that a probable loss of 

 crops worth £250,000 was prevented this year. On one sugar-cane 

 plantation of about 3300 acres fourteen tons of eggs were dug out. 

 The use of poisons and the services of locust-eating birds (inclusive 

 of stork -migrants from Europe) are also discussed, and numerous 

 reports from various parts of South Africa are printed. The Report 

 may be commended to the favourable attention of both naturalists 

 and agriculturists. 



PROCEEDINGS OF LEARNED SOCIETIES. 



GEOLOGICAL SOCIETY. 



December 1st, 1909.— Prof. W. J. Sollas, LL.D., Sc.D., F.R.S., 

 President, in the Chair. 



The following communication was read : — 



'The Tremadoc Slates and Associated Rocks of South-East 

 Carnarvonshire.' By William George Fearnsides, M.A., F.G.S., 

 Fellow of, and Lecturer in Natural Sciences at, Sidney Sussex 

 College, Cambridge. 



This paper gives the results which have been obtained by the 

 Author in making a detailed map of the country about Portmadoc, 



