124 



Trioza sp. is generally considered only a minor pest of Citrus. The 

 eggs are laid on the tips of the twigs and the newly hatched insects 

 settle on the lower surface of the expanding leaves, a rounded pit 

 forming in the leaf beneath each one. This Psylhd is common in the 

 east of the Cape and in Natal and the Transvaal, and is thought to 

 spread to Citrus from some native plant. The attack is generally 

 most severe on nursery or newly planted trees, but bearing trees are 

 occasionally badly damaged, the new growth being blanched and 

 deformed. 



Leaf-eating beetles that have recently been troublesome include 

 Ellimenistes laesicollis, which usually lives among native vegetation, 

 but attacks cultivated plants in the vicinity when this is cleared. 

 The Coccinellid, Epilachna dregei, defoliates potatoes and can be 

 killed by lead arsenate. From the Northern Transvaal a beetle, 

 supposed to be Colasposoma scutellare, is reported as devastating a 

 garden and orchard. A somewhat similar beetle, Plagiodera ctiprea, 

 is very prevalent on a veld plant, and has also been recorded as a 

 pest of certain cultivated plants. A serious outbreak of caterpillars 

 of Helioihis (Chloridea) obsoleta was reported in one district ; it lasted 

 about a week, during which time newly formed fruit was badly 

 damaged. The weed, Solanum aurictdatum, is noted for being heavily 

 infested with the bug, Acanthocoris fasciadatus, F. In recent years, 

 records have been made of its attacks on potatoes, tomatos and 

 chilli plants. , 



PoMEROY (A. W. J.). Entomology. — Nigeria : Ann. Kept. Agric. 

 Dept., Southern Provinces, for 1st January 1920 to 31st March 

 1921, Lagos, 1921, pp. 21-23. [Received 10th January 1922.] 



The chief cotton pests of Southern Nigeria are the cotton-stainers, 

 Dysdercus superstitiosus, F., D. nielanoderes, Karsch, D.fasciatus, Stal, 

 and Oxycarenus dudgeoni, Dist., and the bollworms, Diparopsis castanea, 

 Hmps., and Earias biplaga, Wlk., those of minor importance being 

 the grasshopper, Zonoceros variegatus, L., and the leaf- roller, Sylepta 

 derogata, F., and other Lepidopterous larvae. The cotton-stainers are 

 more numerous in districts where two crops are grown. 

 I,. Mussidia nigrivenella, Rag., which attacks mature pods of cacao, 

 may be controlled by burning all infested pods. This moth also 

 attacks maize. An undescribed species of Cirphis has been causing 

 considerable damage in maize stalks. Experiments in burjdng the 

 old stalks to prevent the emergence of the adult moths have not been 

 conclusive. 



Mango fruits are attacked by the moth, Achaea lienardi, Boisd., 

 against which no satisfactory remedial measure has yet been devised. 



Some account is given of the investigations on the wild silk produced 

 by moths of the genus Anaphe. 



QuiNN (G.). The Codlin Moth [Carpocapsa pomonella, Linn.). — //. 



Dept. Agric. S. Australia, Adelaide, xxv, no. 4, November 1921, 

 pp. 288-290. 



The various protective and remedial measures against Cydia ( Carpo- 

 capsa) pomonella adopted in South Australia, where such treatment 

 is compulsor}^ are described. 



