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NOTES ON SCALE-INSECTS (COCCIDAE). PART II. 



By Professor R. Newstead, F.R.S., &c. 



The Liverpool School of Tropical Medicine. 



This paper deals with a number of Coccids which have been forwarded 

 through the Imperial Bureau of Entomology from the following countries : The 

 Dutch West Indies, Barbados, British Guiana, Zanzibar, Uganda, Nyasaland, 

 and Nigeria. Five species are herein described as new to science, the others, 

 for the most part, are well-known pests affecting cultivated plants in various 

 parts of the world. 



Icerya maxima, sp. n. 



Female adult (fig. 1). — Dorsum covered with striated lamellae of white wax ; 

 those in front relatively small and irregularly conchoidal in shape ; median row 

 much the smallest ; submedian row very broad, curved outwards, and very thin ; 

 marginal series of great length, ribbon-like and curled. Ovisac formed beneath 

 the abdomen by a complete pellicle of closely-felted secretion which is attached 

 to the sides of body only, thus a narrow space is formed between the pellicle 



Fig. 1. — Icerya maxima, Newst., 9 9 t na ^- s i ze - 



and the abdomen for the reception of the ova. Antennae (fig. 2a) of 11 segments 

 of which the 2nd and the 11th are the longest ; all the segments with fine hairs, 

 a few of those on the 8th to the 11th, inclusive, much longer than the rest. 

 Spinnerets (fig. 26) very abundant on the dorsal integument, but less so on the 

 venter. Legs normal and very stout. Stigmata nearly as large as the coxae 

 and very strongly chitinised. Rostrum provided with a long membranous tube, 

 down which the loop of the filaments pass (?) when in repose or when partly or 

 wholly retracted. Marginal hairs relatively short and slender. 



Length, exclusive of marginal appendages, 18-21 mm. ; width 13-17 mm. The 

 longest marginal appendage may measure as much as 15 mm. 



