150 



Agee (H. p.) & SwEZEV (O. H.). Director's Report. — Rept. Committee 

 in Charge Expt. Sfa. Hawaiian Sugar Plant. Assoc, for Year 

 ending 30th September 1920, Honolulu, 1920, pp 7-40. [Received 

 26th Januaiy 1921.] 



The sugar-cane leafhoppcr [Perkinsiella saccharicida] has not 

 caused many serious infestations since last year's report [R.A.E., 

 A, viii, 72] was issued. While the propagation and distribution 

 of parasites of the leafhopper have been continued, trapping with 

 sled traps and spraying are both proving very effective auxiliary 

 measures. For the spray, a dilute solution of nicotine sulphate is 

 used, and is pumped into the plant spaces where the hoppers con- 

 gregate, producing from 70 to 90 per cent, mortality among the 

 insects. Although a certain number of the parasites are bound to be 

 destroyed, the destruction of leafhoppers is proportionately much 

 greater. The disco\'erv and importation of tlie parasite Cyrtorhinus 

 mundulus from Queensland is described [R.A.E., A, viii, 525]. 



The beetle Anomala [orientalis] is now very seldom seen, being con- 

 trolled by its introduced parasite, Scolia manilae, which is still being 

 distributed and is proving a very useful enemy to the rose beetle, 

 A doretus [sinicus] . 



The wireworm, Hlonocrepidius exul, has been injuring young cane 

 in some localities. Though known as a beneficial predator of grubs and 

 pupae of the cane borer [Rliabdocnemis obscura] and of grubs of A. 

 orientalis, it has lately attacked the eyes and tender shoots of seed- 

 cane, and has also been found in ratoon fields. It is thought it was 

 primarily attracted by the presence of the Olinda beetle, Pantomorus 

 fulleri. Experiments with poisons and repellents have given little 

 promise of success, and an entomologist is proceeding to the Philippines 

 to search for natural enemies there. The Coccinellid, Coccinella 

 arciiata, and the lacewingfly, Micromns vinaceus , brought from Australia 

 to combat Aphids, have been reared and liberated in large numbers, 

 but in only one place have they been found to be established. 



The New Guinea Tachinid [Ceromasia sphenophori] checks any 

 serious infestation by the cane borer. 



Tarsonemus bancrofti (cane blister-mite), which has been a pest of 

 cane for many years, has recently been causing rather serious damage. 

 The mites work under the green leaf-bases, giving rise to tiny blisters 

 that form scabs on the intemodes. 



HiNES (C. W.). Diseases, Insects, and Plant Pests o£ the Sugar-cane 

 in the Philippine Islands. — Philippine Agric. Rev., Manila, xi, 

 no. 4 (1918) 1920, pp. 275-277, 3 plates. [Received 25th 

 January- 1921.] 



Among the pests of the sugar-cane in the Philippines the cane borer, 

 Diatraea saccharalis, is the most common, but it does less harm than 

 in other countries, owing to the control exercised by native parasites. 



ScHWARz (E. A.). U.S. Bur. Entom. A New Scolytid Beetle from 



Tropical Florida. — Proc. Ent. Soc. Washington, D.C., xxii, no. 8, 



November 1920, pp. 222-226, 2 figs. 



Dendrositius bourreriae, sp. n., here described, was found boring 



in Bourreria havanensis in Florida. The finding of this genus in Florida 



indicates that Dendrosinus globosus may yet be rediscovered there. 



