47^ 



BuRKiLL (I. H.). Annual Report of the Director of Gardens, Straits 

 Settlements, for the Year 1915. — Singapore, 1916, 7 pp. [Received 

 14th September 1916.] 



The following insect pests were observed during the year : — 

 Lepidoptera : Calogramma /estiva on leaves of Crinum asiaticum ; 

 CatocJirysops pandava on cycads ; Erionota thrax on foliage of pisang 

 and Manila hemp ; the larvae of a Microlepidopteron on avocado pear ; 

 the larvae of a moth resembling Zeuzera coffeae in stems of Bauhinia 

 Candida ; and Brachartona catoxantha on nipa and coconut palms, the 

 pupating larvae of which were killed in considerable numbers by the 

 fungus, Botrytis necans. Coleoptera : Bhynchophorus fenugineus on 

 Cocos ; Xylotrupes gideon in stems of Pinanga ; an undetermined 

 beetle on leaves of Nymphaea. 



Storey (G.). List of Egyptian Insects in the Collection of the Ministry 

 of Agriculture.— Mtm's/. Agric, Cairo, Tech. & Scient. Service, 

 Bull. no. 5 (Entom. Sect.), 12th March 1916, 52 pp. [Received 

 14th September 1916.] 



This list includes a number of species of economic importance. 

 The collection has been brought together during the past four years 

 mainly with a view to assisting work on economic entomology. 



GouGH (L.). Note on a machine to kill Gelechia larvae by hot air, and 

 the effects of heat on Gelechia larvae and cotton seed. — Minist. 

 Agric, Cairo, Tech. & Scient. Service, Bull. no. 6 (Entom. Sect.), 

 12th March 1916, 18 pp. [Received 14th September 1916.] 



This hot-air machine for killing the larvae of Gelechia gossypiella 

 is the outcome of previous work [see this Review, Ser. A, iii, p. 505 ; 

 iv, p. 230] and is a simple apparatus, consisting mainly of a furnace for 

 the generation of the hot air, a hot air chamber through which the seed 

 passes, and a motor. The chamber is a box of iron, insulated to prevent 

 loss of heat and containing four endless bands made of iron chains, 

 with trays on which the seed is carried. By means of a contrivance, 

 the seed, after having been carried nearly the whole journey of the 

 upper surface of the upper part of a band, is discharged on to the upper 

 surface of the lower part of the same band, from which, after travelhng 

 nearly the whole journey, it is again discharged on to the upper surface 

 of the upper part of the next band, and so on, until finally it is dis- 

 charged into an Archimedean screw conveyor which carries it into the 

 sacking exit. The seed is introduced by an automatic hopper, which 

 drops in exactly the quantity of seed required to make a layer one seed 

 deep on the endless bands. A fan causes a continuous current of air to 

 circulate through the machine. The air is exhausted from the hot air 

 generator, a brick chamber surrounding the furnace, the temperature 

 being regulated by a damper interposed between the generator and the 

 hot air chamber. A thermometer shows when the damper should be 

 worked and it is proposed to fit a thermo-regulator attachment which 

 would do away with hand control entirely. In working the machine 

 the factors to be considered are : — (1) the temperature of the seed when 

 entering the machine ; (2) the time required to pass through the 

 machine ; (3) the temperature the machine is regulated to give ; 



