439 



During the past year serious infestations of the leaf-hopper [Perkin- 

 siella saccharicida] have been scarce. The damage in Kallai and Oahu 

 was hardly noticeable, except in the latter, where fields of one variety 

 of young plant-cane were heavily infested in the spring, continuing into 

 the summer. Where drought conditions prevailed this pest affected 

 the growth of the cane. The severest injury always occurs in late- 

 planted fields. It is difficult to estimate whether artificial or natural 

 control measures are the more successful. The annual report of 

 the Olaa Sugar Company states that seed traps and spraying with 

 a dilute solution of nicotine sulphate are proving more valuable than 

 parasitic control. 



Spraying has little effect on the leaf-hopper parasite, Paranagrus 

 [R.A.E., A, viii, 430]. Drypta australis and Cyrtorhinus mundulus, 

 introduced from Australia, have already been noticed [R.A.E., A, 

 viii, 525]. 



Antonina australis, a scale that feeds on nut grass, has also been 

 introduced from Australia. 



Anomala [orientalis] hardly exists now, owing to its parasite, Scolia 

 manilae, many females of which have been distributed through the 

 various colonies. This parasite is largely dependent on the larvae 

 of the rose beetle, Adoretus [siniciis], and owing to the reduction in the 

 numbers of this beetle, rose bushes can now be grown and vineyards 

 are little damaged. 



Experiments with poison and repellents against Monocrepidiits 

 exul, attacking seed cane [R.A.E., A,, viii, 461] show little promise. 

 Visits are being made to the Philippines and Australia in the hope 

 of discovering a natural enemy of this wire worm. 



Coccinella arcnata and Micromus vinaceus (lacewing fly), brought 

 from Australia in 1919, have been bred out and distributed over 

 the colonies to combat Aphids. The New Guinea Tachinid fly [Cero- 

 masia sphenophori] still continues to hold in check the cane-borer 

 [Rhabdocnemis obscura]. 



During the summer of 1920 Tarsonemus bancrofti (cane blister- 

 mite) caused serious damage to cane sticks in one plantation. The mite 

 operates under the green leaf bases, causing tiny blisters on the 

 internodes. 



KiEFFER (J. J.). Un Platygasterine Parasite d'un Cynipide. — Broteria^ 

 Braga, Ser. Zool., xix, no 2, 1st June 1921, pp. 68-69. 



Up to the present no Platygasterine was known to parasitise another 

 Hymenopteron. This paper describes Fa/iringeria synergonim, gen. 

 et sp. n., several specimens of which were living in the galls of Biorrliiza 

 pallida, Olivier, where they were endoparasites of the lar\'ae of Synergus 

 gallae-poniiformis, Boyer {facialis, Htg.), a commensal of the other 

 Cynipid. 



Passalacqua (V.). Contro gli Afidi dei Pomidoro e delle Cucurbitacee 



[Measures against Aphids infesting the Tomato and Cucurbit- 

 aceae.] — ■// Rinnovamento Econ.- Agrar., Trapani, xv, no. 4, 

 April 1921, pp. 58-59. 



Against the black aphis, attacking tomatos, melons and pumpkins 

 in the province of Trapani, Sicily, spraying with a 3 per cent, soap 

 solution, or with one of lime-sulphur or phenicated tobacco extract, 

 is the remedv advocated. 



