650 



Mayne (R.)- Le Papillon des Citrus {Papilio demoletis, L.) [The citrus 

 butterfly, Papilio demoleus, L.] — Bull. Agric. Congo Beige, London, 

 V, no. 4, December 1914, pp. 598-600. [Received 15th October 

 1915.] 



The larva of Papilio demodociis, Esp., which is a very common pest 

 of citrus plants and has also been found on Zizyphus jujuha and 

 Glycosmis pentaphylla, occurs throughout the Belgian Congo, where 

 3''ouno citrus trees are sometimes completely stripped. Observations 

 made in the Lower Congo show that the length of the pupal 

 stage varies with the seasons. In one case a larva pupated on 

 3st June and the adult emerged on 17th November, 5|^ months 

 later. In a second case pupation began in November and the adult 

 appeared after 17 days. In a third instance, during March, emergence 

 took place after 16 days. Collection of the eggs and larvae from the 

 leaves is recommended. Insecticides require to be applied at frequent 

 intervals, which entails expense. A suitable formula is Scheele's green 

 1 oz., quicklime 1 oz., water 10 gals. 



Hood (J. D.). A new Hoplandrothrips (Thysanoptera) from British 

 Guiana. — Canadian Entomologist, London, Ont., xlvii, no. 8, 

 August 1915, pp. 241-244, 1 fig. 



A description is given of Hoplandrothrips affinis, sp. n., obtained 

 from between the leaf sheaths of sugar-cane at Berbice, British Guiana, 

 on 2nd March 1915. This is the only species of the genus yet recorded 

 from South America. 



AsuBY (S. F.). Notes on diseases of cultivatei crops observed in 



1913-14. — Bfdl. Dept. Agric, Jamaica, Kingston, ii, no. 8, August 

 1915, pp. 299-327, 2 plates. 



The budrot of the coconut palm has been attributed in part to the 

 action of scale-insects. Recent investigations seem to show that it is due 

 to several species of bacteria. The drying up of one or more of the inner 

 leaves may be due to attack by Metamasius (Sphenophorus) sericeus 

 boring through into the heart. The rhinoceros beetle feeds on the tips 

 of the young leaves ; " kreso " disinfectant, 1 part to 10 or 15 parts 

 water, poured into the heart rapidly kills this beetle. Leaf -stalks in 

 the bud are sometimes bored by Sphenojjhorus sp., but it is doubtful 

 if the attack is made on healthy tissue. Xylehorus perforans has been 

 found in Jamaica only in diseased and fermenting stems. Scale-insects 

 {Aspidiotus destructor, Diaspis hoisduvalii, Vinsonia stellifera) are the 

 most serious pests of coconut. The leaves and pods of cacao suffer 

 from the attacks of thrips, especially in dry weather. They can be 

 controlled by spraying with kerosene emulsion. Citrus trees on the 

 dry plains near the coast are attacked by Lepidosaphes hechvi (purple 

 scale) and Chionaspis citri (snow scale). Aspidiotiphagus citrinus, 

 a Chalcid parasitic on these scales, is very abundant in Jamaica. 

 A mite is frequently associated with the snow scale and probably 

 feeds on its eggs. Three species of fungi, Sphaerostilbe coccophila, 

 Myriangiimi duriaei and Ophionectria coccicola, are the most important 

 enemies of scales, especially in the higher or wetter districts. Insecticides 

 used in the control of the scales do not destroy the fungi, but are injurious 



