Scd/c on Piuciippics aiiii fine Ihcf/c. 135 



water and the lapj^er iho lumps of cyanide usetl the slower the gaa 

 comes nil". 



ExiKTiments fonductetl Ity Mr. CoiLsins in Kn;,dauil .show that the 

 following' tiuauiilies aix* reciuijvd }>er cuhic foot ttf .space — 3 ozs. of 

 cyanide, 5 ozs. of acid, 8 ozs. of water j»er lOKU cuhic fi'et. lioth the 

 cyanitle antl the gius genenited lire iKjisons. 



If )pxA trejitmeut cannot be ciirried out owinj; to lack of material 

 or apparatus, tlien spniyin;.; should be enipluyed. 



Scale on Pineapples. 



{Diaspis bromcU<r, Kerner.) 



Pineapples are frequently damaged by a scale insect, which now 

 and then cau.ses the fruit to rot. Specimens have been sent by Mr. 

 Hammond, of Kin^'ston, Jamaica, for identification and information 

 concerninj,' it. This saile is the Pineapple Saile (Diaspis hromdiic, 

 Kerner). The sc4de is thin, circular and pure white — the females 

 yellow or orange. Like most Diaspids, tlu-y burmw l»eneath llie 

 epidermis of the plants an<l become almost entirely hidden. 



It chiefly attacks the leaves, but now and then the fruit. 



It should be destroyed as s<x>n as the fruit is cut. 



sup-(; Kor p /;. 



Section ill. 

 .Vnimal-s Injirioi's to Forrstuy, 



The Pine Beetle. 



(Ifi/lcJtinitJi pinipcrtia, Linn.) 



Some pine wood sent by K. E. Haslam, Es(j., fmm Monico, was 

 found to \ni attacke<l by the Pine lieetle (Ht/lesiniu pinipcrda, Linn.) 

 It had kille<l an old tree and two young ones. This insect chirfly 

 atUicks diswuseil and damaged timlx.'r ; but if no unhealthy tnrs jire 

 al>out it will attack healthy ones. As a rule one sees this jjost 

 Working in plantations of aUnil thirty years standing. 



Scotch and Weymoutii Pines are chiefly attacked, but cluster and 

 other sjiecie-s of pines are frequently recoriltnl as licing damaged by 

 this i>est. 



This insect docs harm in three ways ; (i) the Wtles and larv.T 

 attack lark and Ixist, the fonner making longitudinal galleries with 



