42 



its life-history are recorded [R.A.E., A, ix, 496]. The galls, which 

 are the immediate cause of the death of the trees, are produced by the 

 larvae, and generally appear on the stems, reaching two or three 

 centimetres in length and sometimes twice the thickness of the normal 

 stem ; they contain the larval burrows. The swelling does not begin 

 to form until the second year of injury, and in the third year the 

 whole stem gradually dies. 



Li.OYD (Ll.). Notes on a Colour Tropism of Asterochiton {Aleurodes) 

 vaporarionim, Westwood. — Bull. Ent. Res., London, xii, pt. 3, 

 November 1921, pp. 355-359, 5 figs. 



An investigation into the habits of Asterochiton [Aleurodes) 

 vaporarionim, Westw., with a view to controlling its attacks on 

 tomatos under glass, is described. A study of its colour tropisms, 

 here described in detail, leads to the conclusion that both sexes 

 are attracted to yellow objects. Enormous numbers of these white- 

 flies can be caught on a yellow screen by shaking infested plants near 

 it. This method is not worth elaboration, however, as perfect 

 control can be obtained in greenhouses by fumigations with hydrocyanic 

 acid, and out of doors the insect does very little damage in England 

 and can rarely be considered a pest. 



VoGEL (L H.). The Cabbage Seed Stalk Weevil [Ceuthorrhynckus 

 quadridens, Panzer). An important Pest of Cabbage Seed Plants 

 on Long Island. — Canad. Ent., Gnelph, liii, no. 8, August 1921, 

 pp. 169-171. [Received 22nd November 1921.] 



As a result of injury to cabbages by Ceuthorrhynchus quadridens, 

 Panz., the seed produced by the infested plants shows a reduction in 

 quality, and in quantity this amounts to about 40 lb. per acre on Long 

 Island. Oviposition occurs from about 16th to 26th May. The 

 eggs hatch in about four days, and the larvae enter the midrib by the 

 egg puncture. Their work extends down the pith of the branches 

 and main stalk. After about ten days they bore a hole through the 

 stalk, and drop to the ground ready for pupation. This occurs near 

 the surface of the soil, and occupies about ten days. Adults were 

 noticed from 16th June to 10th July. Hibernation probably occurs 

 in this stage. 



Morrison (H.). U.S. Bur. Ent. Some Nondiaspine Coecidae from 

 the Malay Peninsula, with Descriptions of apparently New Species. 



— Pliilippine Jl. Sci., Manila, xviii, no. 6, June 1921, pp. 637- 

 677, 1 plate, 'l 3 figs. [Received 22nd November 1921.] 



The new species described are : Anomalococcus midtipori, on stems 

 of Nephelium lappaceum beneath ant cartons and on leaves of 

 Oncosperma horrida ; Pseudococcus hispidus, on Gordonia ; Alecaniwn 

 hirsutum, on Alsodeia echinocarpa attended by ants; Coccus tumuliferus, 

 C. penangensis, C. caviramicolus, C. macarangae and C. circularis, 

 in hollow stems of Macaranga spp. ; Platylecanium asymmetricum , 

 on the lower surface of leaves of Penanga ; Paralecanium ovatum, on 

 Pandanus ; and P. vacuum, on Ficus. 



Keys are given to the species of Coccus and Platylecanium. 



