1835.] E. T. Atkinson — On the Homojtterous Family CoccidaB. 273 



secretional layer or plate ; shield in d" , produced ovallj, larval skin 

 almost at the apex : — Targionia, Sign. [1. c. x, 105]. 



b. Shield in ? produced ovally or mussel-shaped, ^. e. narrowed 

 in front and gradually widened behind : first larval skin at the apex or 

 very near it. 



a. Shield of 9 long, oval or elliptic : larval skin placed at the 

 apex or near it : body of 9 broadly oval : shield of <? long, narrow, with 

 almost parallel sides : — Parlatoria, Sign. [1. c. ix, 450]. 



b. Shield of $ narrow at the apex, gradually widened towards 

 the posterior part, mussel-shaped : larval skin placed at the apex : body 

 of ? ovally produced or in form of an ellipse. 



1. Shield of ? brown, more or less transparent : shield of <^ 



brown, narrow, elongate, convex like that of the 9 • Myti- 

 laspis, Targ. [Sign., 1. c. x, 91 : includes LepidosapheSf 

 Shimer]. 



2. Shield of ? white, opaque : shield of c? white, long, narrow, 



with nearly parallel sides, scarcely broader than the 

 larval skin, flat, with median and lateral longitudinal 

 ridges : — Chionasjpis, Sign. [1. c. ix, 442]. 



B. Leucaspiaria : — Adult female enclosed in the second (lower) 

 larval skin, which forms a portion of the shield, which is itself as large. 

 or nearly as large as the perfect shield and has no secretional appendage. 



a. Shield of $ ovally produced or with parallel sides : the first 

 larval skin ovally produced and placed at the apex of the shield. 



1. Shield of $ ovally produced, white: the first larval skin yel- 



lowish or brownish, the second pitch- or red-brown : shield 

 of $ very long, narrow, pure white, very convex behind 

 the yellowish larval skin, somewhat flattened posteriorly : — 

 LeucaspiSj Sign. [Sign,, 1. c. x, 100]. 



2. Shield of ? narrow at the apex, then abruptly widened and 



produced, with almost parallel sides, delicate, brownish- 

 yellow : shield of cf of the same shape but much smaller 

 and narrower: — Fiorinia, Sign. Sign.^ 1. c. ix, 449]. 

 h. Shield of ? circular or broadly-oval, rather flat : the first larval 

 skin oval or almost circular, placed in the middle or slightly away from 

 the m.iddle of the shield : shield in <? oval, with the larval skin away 

 from the middle : — Aonidia, Sign. [Sign., 1. c. x, 102]. 



Maskell [Trans. New Zeal. Ins. xii, p. 293, 1880] has created 

 a genus PoUaspis, which he describes as possessing the same character 

 as Leucaspis, but it has also a fringe of spiny hairs set close together 

 around the edge of the abdomen, which fringe is absent in Leiicaspis. 



