258 



Insect Pests in British Guiana. — Agric. News, Barbados, xv, no. 364, 

 8th April 1916, pp. 122-123. 



This paper gives a summary of a chart dealing with insect pests, 

 recently issued by the Board of Agriculture of British Guiana. The 

 origin of insect pests, the life-cycle of common forms, and the usual 

 methods of control are dealt with in a popular manner. Special 

 reference is made to insects occurring in the Colony. 



NowELL (W). The Internal Diseases of Cotton Bolls. — Agric. News, 

 Baihados, xv, no. 364, 8th April 1916, pp. 126-127. 



Experiments carried out in Montserrat to determine the connection 

 between cotton stainers and cotton boll disease showed that Ne:ara 

 viridida (green bug) is capable of originating the disease in healthy 

 plants. The spores of the specific fungus are either carried by, or 

 follow upon the attacks of plant-feeding bugs. The fungus concerned 

 has been found in material from Tortola, St. Kitts, Monserrat, St. 

 Vincent and Barbados. The fact that the amount of stained of cotton 

 is not in proportion to the number of insects present, indicates the 

 necessity for taking the fungus into account, since it is probable that 

 the disproportion is due to the effect of prevailing conditions upon the 

 latter. 



Report on Silk from Trinidad. — 5m?'. Bept. Agric, Trinidad and 

 Tobago, Port-of -Spain, xv, no. 2, 1916, pp. 67-69. 



The examination of silk from Bombyx mori (mulberry silkworm), 

 Attacus ricini (eri worm) and A. hesperus (native silkworm), reared in 

 Trinidad, has shown that silkworms can in all probability be success- 

 fully bred in the island. It might therefore be possible to estabhsh 

 silk-culture as a village industry. The following species also are 

 reported on: — A. cynthia (Ailanthus silk moth of northern China and 

 Japan), Antherea pernyi (Mongolian oak-feeding silkworm), Telea 

 polyphemus and CaUosamia promethea. Prehminary experiments have 

 shown that A. cynthia and A. pernyi can be reared in Trinidad. The 

 silk from A. hesperus is of poor quality and the larvae bear irritating 

 hairs which might seriously affect the workers. Hence it seems 

 advisable that attention should be first directed to B. mori and A. ricini, 

 as the silk from these is good and the food-plants grow well in the 

 island. A. ricini may prove the more suitable of the two species, 

 since it can withstand a high temperature and the silk is more easily 

 handled. 



Ball (E. D.). New Species of Eutettix and Phlepsius (Homoptera). — 



Canadian Entomologist, London, Ont., xlviii, no. 4, April 1916, 

 pp. 124-130. 



The new leaf-hoppers described are : — Euiettix columhiana, from 

 Washington ; E. nevada, from Nevada ; E. rubida, from Utah ; 

 E. insana var. coronata, var. n., from California ; E. coloradensis var, 

 visalia, var. n., from California ; Phlepsius locidatus, from California 

 and Utah ; P. stellaris, from Utah. 



