68 R. NEWSTEAD — NOTES ON SCALE-INSECTS (COCCIDAE). — PART I. 



Sierra Leone : Daru, 18. viii. 12 (Dr. J. J. Simpson). 



The ovisacs contained numerous dead larvae which agree in every detail with 

 typical examples from Amani ; the enormous length of the antennae and caudal 

 hairs being strikingly characteristic. 



Fig. 1. — Icerya lonf/hetnsa, Newst. 



Icerya purchasi, Maskell. 



Zanzibau (Dr. W. M. Aders). 



Found on orange and other species of Citrus. This is a new locality for this 

 destructive pest, which is generally known as the " fluted scale." 



Dactylopius (Pseudococcus) obtusus, Newstead. 



Dactylopius (Pseudococcus) obtusus, Newst., Sond. Mitteil. Zool. Mus. Berlin, v, 

 pt. 2, p. 164 (1911). 



Female, adult (figs. 2 and 3). — Dorsum completely covered with a creamy white 

 and rather closely felted secretion, with some indication of being divided into 

 regular plates ; margin with a series of creamy white or pale buff appendages, 

 relatively short at the sides, but lengthening as they approach the posterior 

 margin, where they are of great length, distinctly curved or twisted, and very 

 stout ; all the appendages rest more or less upon the ovisac. Ovisac complete, 

 rather closely felted, and firmly attached to the insect. Colour creamy white 

 or buff white, very highly convex, widened posteriorly, narrowed somewhat 

 anteriorly ; both longitudinally and transversely striated or faintly fluted, the 

 longitudinal striae being much more distinct and also more widely separated than 

 the transverse ones which are decidedly faint. The size of the ovisac and 

 secretionary covering combined as compared with that of the female is extra- 

 ordinary. 



In my original description of this insect I was unable to give any information 

 regarding the external covering of the female, as all the cereous matter had been 



