TJrich (F. W.). Notes on the South American Migratory Locusts 



-^ (Schistocerca paranensis). — Bull. Dept. Agric, Trinidad and 



Tobago, Port-of -Spain, xv, no. 5, 1916, pp. 172-173. 



In a further report on Schistocerca paranensis [see this Review, 

 Ser. A, iv, p. 170], it is stated that no locusts reached Trinidad until 

 10th June 1916, when a large swarm landed on the island of Patos. 

 As the food conditions were not favourable owing to dry weather, the 

 insects took wing and were driven back to Venezuela by a strong 

 easterly wind. On 16th and 18th July another swarm landed and 

 remained, most of the insects being destroyed by a bran mash bait. On 

 24th July, Patos was again invaded by a large swarm, which was 

 dealt with in the same way. 



Insect Pests in Jamaica. — Jl. Jamaica Agric. Soc, Kingston, xx, no. 9, 

 September 1916, pp. 361-362. 



Further investigations on the pine-apple weevil [Metamasius ritchiei, 

 Mshl.] have shown that young plants and first-year pines are liable 

 to be attacked, and that the theory that some species are immune is 

 not likely to prove true. In August, when the adult weevils are scarce, 

 there should be an extensive weeding out of affected pines. These 

 should be split open so as to expose the larvae to the weather and theii" 

 natural enemies. The larvae are capable of only limited locomotion, 

 whereas if allowed to grow to maturity they can fly to fresh plants or 

 imattacked plantations. 



Two species of Cerambycid •wood-honngheetles, Cylindera flava, P., 

 and Neoclytus longipes, Drury, and a new species of Thrips, Plectro- 

 thrips [pallipes, Hood], which was found in the burrows of the former, 

 have been bred from pieces of pimento wood. Though large numbers 

 of these trees have died, these beetles are probably only a secondary 

 enemy, as they appear to attack the dead wood only, and the trees had 

 already been severely attacked by a new scale-insect, a species of 

 Odonaspis. 



In the Mocho district citrus trees have suffered from sooty mould 

 following an attack of black fly, Aleurocanthus woglumi. As the ant, 

 Cremastogaster brevispinosa, Mayr, has swarmed on these trees for years 

 before the arrival of A. woglumi and as it interferes with the picking 

 of the crop, its economic value as an enemy of the black fly is 

 considered doubtful. 



Baker (A. C.) & Turner (W. F.). Morphology and Biology of the 

 Green Apple Aphis.^ — Jl. Agric. Research, Washington, D.C. v, 

 no. 21, 21st February 1916, pp. 955-993, 4 figs., 9 plates. 



The abundance and destructiveness of Aphis pomi, De G. (green 

 apple aphis) in most apple-growing regions of the United States led to 

 a careful study of its life-history being made from 1913 to 1915, the 

 results of which are given in detail in this paper, including a diagram 

 showing the number of lines possible from one stem-mother. The 

 egg is laid chiefly on the tender twigs of the apple and development for 

 a few days is very rapid, after which it rests for the winter. The egg 

 hatches early in April and the resulting stem-mother is wingless and 

 becomes mature in about 10 days. She gives rise to summer forms. 



