30 



REMARKS. 



This is a very common species and is found on almost every 

 Thuja tree in Egypt. 



37. Chrysomphalus aonidum Linn. =Aspidiotus ficus Riley. 

 (THE BLACK SCALE OF CITRUS TREES). (Fio. 2.) 



BIBLIOGRAPHY : Newstead, Mon. Brit. Cocc., Vol. i, p. 104. 

 Green, Cocc. of Ceylon, Part i, p. 43. 



The female puparium is circular convex, brownish black with 

 central pellicles. Pellicles reddish yellow always partially obscured 

 by a layer of secretion which is reddish brown above the first and 

 pale olivaceous above the second pellicle. In the centre a circular 

 raised disc is usually exposed, the secretion ary covering being here 

 worn off. In young specimens the centre is covered by a raised patch 

 of opaque white secretion. 



The male puparium is dark brown to black oval in shape, with 

 sides parallel and ends broadly rounded, the posterior extension 

 grey to blue grey. 



In some specimens the female puparia are distinctly paler, the 

 margin being a light grey and sometimes almost white. This is 

 particularly the case with specimens on olives. Other specimens on 

 olives under a lens exhibit a somewhat irregular surface mottled 

 black and grey. 



Some specimens collected on Myrtus communis had bright yellow 

 pellicles quite different from the usual reddish yellow. Referring 

 to the microscopic preparations of these specimens Mr. Laing remarks 

 that " they differ from typical ficus (of Newstead and Leonardi) in 

 having fewer dorsal pores " and he suggests that it may be Malenotti's 

 redently described species (Chrysomplialus calami Mai. which is very 

 near to C. ficus. 



It is certainly very close to C. ficus and Figure 2 shows the pygidial 

 features. The dorsal pores are very much fewer than in typical 

 ficus and the tubular spinnerets are not so numerous. The club 

 shaped glands are very short and it is difficult to make them out 

 with any degree of certainty which is very different from typical 

 ficus in which these glands are obvious. The thoracic spine is 

 also absent. The other pygidial characters are normal. In one 

 example two of the circumgenital glands of the anterior group were 

 displaced centrally. 



HOST PLANTS. 



Anacardiacese *Mangifera indica (Mango). 



Anonacese Anona squamosa (Sweet Sop). 



Apocynacete Nerium oleander. 



