1903.] H. W. Peal— Monograph of the Oriental Aleurodidse. 87 



form and colour and in the character of the waxy secretion, It also 

 happens that generally when these insects are collected, only the larvre 

 and pupae are sent for examination, as these are the stages in which 

 damage is done to plants. If however the adult " flies " are obtained, 

 they should always be described, particularly the colour of the wings, as 

 although in most cases they are white some species have the wings more 

 or less spotted with brown or red. 



I have gone somewhat into detail in describing the different larval 

 stages. It is difficult except in some few cases to be absolutely sure 

 as to the number of moults. I have however but little doubt that the 

 normal number is four excluding the pupal stage. This I have made 

 certain of in some species but it is of course impossible to find out 

 the number in many cases as material sent usually consists of only one 

 or two of tbe stages. 



CHAPTER V. 



Description op 7 new species op Aleurodes. 



Aleurodes religiosa n. sp. Plate V, figs. 6-9. 



Signoret in his " Essai Monographique sur les Aleurodes " (Ann. 

 Soc. Ent. France Ser. 4, VIII, 1868), describes and figures an Aleu- 

 rodid he obtained from Bubus fruticosus and which he named A . rubi. 

 This species is distinguished from A. longicerse, Walk, by'minute dif- 

 ferences in the adult insect, the larval ( really pupal) state, which he 

 figures being identical except that as he says " sur la ligne mediane on 

 observe sur chaque segment abdominal une impression plus visible a la 

 base qu'au sommet." In allied species the differences in the adult stage 

 are extremely minute and it is hardly safe to rely on these differences 

 alone in defining a species. 



A. religiosa is undoubtedly closely allied to these two species possess- 

 ing as it does the same series of spines on the dorsum. It however dif- 

 fers in having in addition another pair of spines placed fairly close 

 together on the cephalic region, caudad of the outer and longer pair on 

 cephalic region. It also has two yellow ridges one on each side of the 

 vasiform orifice. The caudal half of the dorsum is narrower than the 

 cephalic half and the margin caudad is slightly incurved. The cephalo- 

 thoracic margins are also incurved the surrounding area being suffused 

 with yellow. The indentures also bear a short fragmentary fringe of 

 wax. 



I have described this species in detail as Signoret gives no detailed 

 description of the vasiform orifice. His drawing shows that it is probably 

 identical or almost identical (but smaller in proportion) to that in A. re- 

 ligiosa ; he does not deal with the earlier stages at all, nor does he give 



