306 TiMEHRl. 



easily recognised. In its earlier stage, it is of a rich 

 silvery colour, but in an adult stage is much larger 

 and assumes a darker hue. It preys on a great variety 

 of plants, from orchids and aroids and other shade 

 loving plants, to trees and shrubs which grow in the 

 open. The symmetrical manner in which the scales 

 arrange themselves on the backs of the leaves is remark- 

 able. Its texture is brittle, and the best and perhaps 

 most effe6live way of removing it is to use a small 

 piece of wood in scraping and rubbing it off. This 

 operation should be performed carefully to avoid injury 

 to the leaves by the pressure of the piece of wood. In 

 the adult stage these inse6ts are, so to speak, so cemented 

 to the leaves that washing or syringing in the ordinary 

 way is of little use as an attempt to get rid of them. 



Aspidiotus personatw:. — Of this genus several species 

 have been forwarded for identification, three or four of 

 which have proved new. That here named cannot be 

 regarded as so destru6live as some of the foregoing 

 kinds of scale. Although commonly met with, it is seldom 

 found in great numbers. Its minuteness and tenacity of 

 adherence to its host render it a very troublesome pest 

 to deal with. The shape is conical and the size about 

 that of a pin's head, the texture is hard and the colour 

 almost black. Some of the new species of this genus 

 are considerably larger than this. The several species 

 affe6t numerous hosts, from palms and other trees to 

 small herbaceous plants. Where present on a limited 

 scale, washing or scraping of the leaves may be resorted 

 to as the most efEeftive way of getting rid of them. 



Lecaniutn mangiferum. — This is the chief of our 

 mango pests, and of all the genera mentioned none is so 



