90 R. T. LEWIS ON A NEW SPECIES OF ALEURODES* 



further disturbed. Having no doubt that these were the adult 

 Aleurodes, he captured a quantity and forwarded them to me, and 

 although extremely dry and fragile on arrival, there was no 

 difficulty in determining that they were what we desired, and that 

 males and females were present in about equal numbers. 



The condition in which they came to hand prevented any very 

 good mounts from being made, but by the examination of a 

 considerable number it has been possible to make out all necessary 

 details, though I regret I am unable to exhibit any specimen this 

 evening which shows all equally well. 



The larval form I have not seen in its natural conditions, bnt a 

 few specimens of various ages, sent over mounted in balsam, and, 

 of course, with all trace of wax removed, lead to the inference that 

 they are inactive and that, as is the case with others of the genus, 

 they resemble the pupae in shape. 



Of the pupa, however, I can speak more confidently, having had 

 the opportunity of examining some hundreds ; these are elliptical 

 in shape, measuring on an average 2 L T " X g^", with a thickness of 

 y^o'' in the middle of the central longitudinal ridge ; in colour 

 they are black when viewed by transmitted light, but when 

 mounted in balsam and seen by reflected light they appear brown. 

 The margin, as seen from above, appears to be beaded or corru- 

 gated, with the exception, in some specimens, of a small space at 

 the posterior extremity (immediately behind the ovate orifice 

 before mentioned), from which two fine setae proceed. These 

 apparent corrugations are, however, the extremities of a series of 

 minute tubes, through which the wax is excreted which forms the 

 delicate marginal fringe sunounding the pupa, but usually ob- 

 scured from view by the overhanging plumes of the more copious 

 secretions from the dorsal surface ; the number of these marginal 

 tubes is found to average about 245 on each specimen. Above 

 these and along each side are several rows of pores from which a 

 much more abundant supply of pure white wax is extruded at an 

 angle of about 45° to the surface of the leaf to which the pupa is 

 attached, the numerous filaments coalesce, and before their full 

 length is attained their extremities bend over in graceful curves 

 until they rest upon the leaf, entirely hiding the marginal fringe, 

 but not touching it. From the pores at the posterior end the wax 

 is thrown out horizontally in spiral curves, which meet and overlap 



