G49 



noticed in dead trunks of PoinciaPM. regia and many other species. 

 The destruction of all dead wood and stumps and the scraping of 

 all wounds, followed by painting with coal tar, are the control measures 

 recommended. A mixture of chloroform, 2 parts, and creolin, 1 part, 

 may be injected into the mines in order to kill the larvae within. 

 A mixture of kerosene and carbon bisulphide proved excellent against 

 many Longicorn larvae ; the kerosene easily passes the stoppings 

 placed in the galleries and carries the carbon bisulphide with it. This 

 should be useful against M. downesi where the wounds are deep and 

 scraping would require too much time. Two unidentified ants, very 

 common in plantations of old Hevea trees, are determined enemies of 

 the borer, often penetrating where insecticides cannot reach. Among 

 the CuRCULiONiDAE attacking the foliage of Hevea, in the Belgian 

 Congo, are: — Lixus auritus, Boh., Blosyrus seminitidus, Mshll., 

 Ischnotrachelus hurneralis, Faust, a)id Isaniris sp. Insecticides should 

 be applied where these pests become abundant. In the Kasai district, 

 a new species of Apion {Piezotrachelus) has been reported as injuring 

 the foliage. The following Scolytidae are found : -Xykborus affinis, 

 Eichh., Stephanoderes congonus, Haged., S. heveae, Hagcd., Hyvo- 

 thenemus tuberculosus, Haged., and other species. The Coreid bug, 

 Anoplocnemis curvipes, has been reported as attacking Hevea in the 

 district of Lake Leopold II. It is probable that the numerous cancer- 

 like lesions on the branches of young Hevea trees are the work of 

 sucking insects, similar to this species. It may be controlled by 

 collecting the larvae and adults with hand nets. The Coccid, Aspidiotus 

 destructor, has been noticed, apparently for the first time, on Hevea ; 

 it also occurs on M. glaziovii and other trees, the coconut being the 

 favourite host. In Africa, this scale is destroyed by the Coccinellids, 

 Harmonia maciilata, F. [sic], and Alesia striata, F. The kerosene-soap 

 emulsion is advised in control. Various species of ants attack Hevea, 

 and on cut surfaces a small bee excavates a gallery, which may attain 

 a length of 2 inches. The grasshoppers, Zonocerus variegatus, L., and 

 the less common Z. elegans, Thunb., devour the parenchyma and 

 skeletonise the leaves. Lead arsenate, Paris green and Scheele's green 

 are the insecticides mentioned. A milk of lime wash is said by Von 

 Faber to be efficacious, though the collection of these insects is 

 preferable. Young plants in the nursery suffer from the attacks of 

 Gryllidae. Against termites fumigation with arsenic sulphide is a 

 radical measure ; to keep the insects away from the plants a small 

 quantity of the following paste should be smeared at their base : 

 Paris green 1 part, common salt 2, leaf mould 20, fowl dung 20. 

 Sufficient water is added to form a thick paste. 



Mayne (R.). Note sur un Ennemi du Caf6ier : le Stephanoderes cojfeae, 

 Haged. [A note on an enemy of the coffee tree : Stephanoderes 

 coffeae, Haged.] — Bull. Agric. Congo Beige, London, v, no. 4, 

 December 1914, pp. 596-598. [Received i5th October 1915.] 



The Scolytid, Stephanoderes coffeae, Haged., is appareiitly spreading 

 in the cofEee plantations in the Belgian Congo. Though it pierces the 

 green berries and attacks the beans, stored and seed cofEee suffer most 

 injury. Great cleanliness in the plantations, drying sheds and stores 

 is necessary. Host plants growing in the vicinity of plantations should 

 be destroyed and seed must be disinfected with carbon bisulphide. 



