504 



guineense, F., attending P. sacchari on sugar-cane and P. citri on 

 cacao pods ; Azteca schimperi, Em., attending Lecanium aequale, 

 Newst., and Ceroplastes avicenniae, Newst., on Courida (Aricennia 

 niiida) ; Dolichoderus (Hypoclinea) bidens, L., attending P. citri, on 

 cacao pods ; and Solenopsis pylades, Forel, attending P. sacchari ; 

 while a species of Cremastogaster fosters Akermes quinquepori, Newst. 



Arrow (G. J.), Distant (W. L.), Gahan (C. J.) & Marshall (G. A. K.). 

 Some Insects injurious to Cacao Plants in the Belgian Congo. — 



Bull. Entom. Research, London, viii, no. 1, August 1917, 

 pp. 111-118. 



This paper contains descriptions of various cacao pests discovered 

 by M. Mayne, Government Entomologist in the Belgian Congo. The 

 Melolonthid beetles are Aserica variegaia, sp. n., which devours the 

 young and tender leaves ; Pseudotrochalus concolor, Kolbe ; and 

 Triodonta procera, Lansb. 



The Coreid bugs described are Pendnlinus devostans, sp. n., and 

 P. nigroynarginatus, sp. n., an allied species found in Natal, which is 

 probably also a destructive insect. 



Two new Longicorn beetles described are Tragocephala maynei, sp. n. , 

 and Exocentrus orimansi, sp. n. 



The injurious weevils are Systates ramosus, sp. n., an insect stated 

 by M. Mayne to occur but rarely, the adult attacking the leaves of 

 full-grown trees ; S. tnaynei, sp. n., which is abundant in cacao 

 plantations and is especially injurious to young plants in the nurseries, 

 the mature insect devouring the leaves : and Alcides theobromae, sp. n., 

 which is not yet sufficiently numerous to be regarded as an important 

 j)est, though the larvae kill the small branches of cacao by boring 

 longitudinal galleries in them. 



L' Arboriculture Fruitiere dans le Nord de I'Afrique. [Fruit-tree Culture 

 in Northern Africa.] — Bull. Agric. Alger. -Tun.-Maroc, Algiers, 

 xxiii, nos. 7&9, July-August 1917, pp. 133-158, 12 figs. 



Apricot trees in northern Africa are sometimes attacked by Cerafitis 

 capitafa and more frequently by the larvae of Drosophila, but these 

 are chiefly injurious to the late varieties growTi on the coast. The 

 lai-vae of the Buprestid, Capnodis ienebrioides, attack the roots and in 

 some cases succeed in destroying the trees. This beetle occurs in 

 Algeria on the coast, where it is the most serious pest of plum trees ; 

 adults should be destroyed on the trees before oviposition, if possible. 

 As the larvae emerge from eggs laid in the fissures of the bark at the 

 base of the trees, whitewashing the trunlcs in May with lime and 

 arsenicals, such as arsenate of lead or arsenite of copper, is a good 

 preventive measure. 



In packing apricots, the fruit must be handled with, as little delay 

 as possible to prevent fruit moths from ovipositing on them. The 

 beetle, Sylvanns mercator, is a particularly troublesome pest which 

 is able to breed in the boxes. 



