344 



Neuroptera and Coleoptera (Coccinellids), and parasitic Hymenoptera 

 (Cynipids, Chalcids, Proctotrupids and Braconids). The sprays men- 

 tioned are tobacco-soap emulsion, petroleum emulsion, an infusion 

 of tobacco dust, and an infusion of quassia [Picrasma excelsa). The 

 last-named is specially suitable for Aphids on peach, because there is 

 no danger of injuring the delicate leaves. 



The more common injurious species are : — Brevicoryne {Aphis) 

 hrassicae, L., A. rumicis, L., .4. persicae, Bo}-., Hyalopterus pruni, F., 

 Toxoptera aurantiae, Koch, T. graminum, Rond., Macrosiphum rosae, 

 L., Myzus cerasi, F., Eriosoma la^tigerwn, Hausm., and E. lanugino- 

 sum, Htg. Except in the case of the last-named, the various forms, 

 the biology, injury and remedies, are briefly dealt with. 



MoRGANTE (R.). Per combattere I'Afide della Fava. [Measures 

 against the Bean Aphis. 1 — L' Agric. Agrigentino, Girgenti, xiii, 

 no. 1-4. January-April 1921, pp. 24-26. 



Owing to the wet weather in April the bean aphis [Aphis rumicis'] 

 has rapidly increased in the Province of Girgenti, Sicily, and spraying 

 with a 2 per cent, solution of tobacco extract containing 5 per cent, 

 nicotine is advised. Pruning off and burying the tender shoots is 

 another measure against this Aphid. A petroleum-soap spray is 

 liable to injure the flowers and foliage. 



BoNDAR (G.). Os Insectos damninhos. xii. Uma Praga do Camboata, 

 oBezouro, Colohogaster chlorosiicta, Klug. xiii. Gorgulho bicudo 

 do Bambu, Rhinastus latisternus, Guer. Men. [Injurious Insects. 

 xii. C. chlorosticta, a Beetle Pest of Guarea trichiloides. xiii. R. 

 latisternus, the Bamboo Weevil.] — Chacaras e Quintaes, S. Paulo, 

 xxiii, no. 4, 15th April 1921, pp. 289-292, 6 figs. 



A Brazilian forest tree, Guarea trichiloides, which is planted on a 

 considerable scale as a shade-tree, has proved quite unsuitable for the 

 purpose, owing its susceptibility to infestation by a Buprestid beetle, 

 Colohogaster chlorosticta, Klug, which mines the trunk and also the 

 branches as soon as their bark becomes rough. 



This pest has a two-year life-cycle. The adults emerge in mid- 

 October, and after swarming in hot sunshine at the end of October 

 and during November, they oviposit in the bark, the eggs being laid 

 in groups of from 5 to 20, or even more, according to the size of the 

 trunks. The larvae mine the cambium without showing any external 

 trace of their presence. During the cold weather in June and July 

 they rest, and then recommence mining in the spring, August- 

 September. In December or January they enter a rest period, 

 and subsequently pupate in August. 



C. chlorosticta is difficult to deal with because the damage it does 

 only becomes apparent when well advanced. In the case of shade- 

 trees that it is wished to save, an attempt may be made by removing 

 the dry bark and killing the pests with a stiff wire, or birds ma}^ be 

 relied on to destroy the exposed larvae and pupae. 



Dr. Costa Lima has already dealt with some Curculionid pests of 

 bamboo in Brazil \R.A.E.. A, iii, 306, 696]. An additional .species, 

 Rhinastus latisternus, Guer., has been observed in the State of S. Paulo. 

 In Februar}' the adults infest the new stems, which are pierced for 

 oviposition. The full-grown larva is said to possess an exquisite 

 flavour and is much relished by the Indians. In September and 



