171 



(J. C. H.). The Spiny Citrus Wiiitefly. A potential Pest of Citrus 



Tiees.' Agric. News, Barbados, xvi, no, 384, 13th January 1917, 

 pp. 10-11. 



Much of the information contained in this paper is taken from a 

 previous article [see this Review, Ser. A, iv, p. 387]. A spray, which 

 has been found efficacious against Aleurocanthus woglmni, Ashby, 

 consists of whale-oil soap, 2 lb., heavy paraffin oil, 2 gals., water, 

 1 gal, forming a concentrated emulsion. Three sprayings are 

 necessary for adequate control. The great rapidity of dispersion 

 of this Aleurodid under favourable conditions makes it a potential 

 pest which is capable of doing considerable damage in a short time. 



Urich (F. W.). Insect Pests in Trinidad. — Entomologist's Report, 

 Minutes Meeting Bd. Agric, Trinidad, 1916, pp. 1-56. [Received 

 27th January 1917.] 



Much of the matter in this report has already been abstracted 

 from other papers by the same author. 



Cosmopolites sordidus (black banana weevil) is reported from some 

 localities in Trinidad. The plants are attacked at the base ; full- 

 grown plants do not as a rule suffer much, but young suckers attacked 

 by the weevils die. The full-grown trees when badly infested fall 

 over and all the leaves wither. Growers are recommended to dig up 

 and burn all infested stools, to plough and fork the land and give it 

 a thorough liming. Experiments will be undertaken to determine 

 whether a Histerid beetle which attacks the larvae of Metamasius 

 may be useful as a natural check on this pest. 



Ancistrosoma tobagoensis was found in the larval stage at Tobago 

 in the soil near young coconut roots. It is not yet known whether 

 it damages coconut roots, but it is certainly injurious to young plants 

 with tender roots. 



Thrips are fomid to reach their maximum development during 

 the last three months of the year. The spraying mixture that has 

 proved most efficacious is Black Leaf 40, in the proportion of 1 gal. to 

 1,200 gals, water. This solution mixes w^ell with Bordeaux and 

 both are used advantageously for thrips on cacao. Stronger solutions 

 are required for killing the larvae and nymphs than for the adults, 

 the nymphs being the most resistant. 



Jones (T. H.). A List of the Coccidae of Porto Rico.— Separate, dated 

 January 1917, from Jl. Bd. Commissioners Agric. of Porto Rico, 

 Porto Rico, vol. 1, no. 1, pp. 1-16. 



This fist includes all the species of Coccidae known from the 

 island of Porto Rico, with their host-plants and localities. A 

 bibliography of 25 works is given. 



Wadsworth (J. T.). Report on a Trial of Tarred Felt "Discs" for 



protecting Cabbages and Cauliflowers from attacks of the Cabbage- 



root-FIy. — Ann. App. Biology, London, iii, nos. 2 & 3, January 



1917, pp. 82-92, 1 plate. 



A full account of experiments made with tarred felt discs as 



used in America and Canada for the control of cabbage maggots 



