1898.] 



93 



? adult probably Tivipa- 

 rous ; approximately circu- 

 lar, flat beneath, convex 

 above, margins flat and thin, 

 forming a flange except at 

 the anal extremity. Colour, 

 dull purple,with dusky white 

 margins. Rudimentary an- 

 tennae usually with three 

 blunt spines. Pygidium 

 (fig. 1) without circumgenital glands ; vaginal opening, and anus opposite ; margin 

 with a series of projecting tubercles or extensions of the body wall, and a few short 

 spines. And there are a few very slender tubular spinnerets arising from the extreme 

 margin. 



Puparium of second stage of ? purplish-brown, circular, with a broad marginal 

 secretion ; larval exuviae central, naked, black or bronzy-black. Diam., '50 mm. 



Larva comparatively large, short-ovate, pale mauve ; eyes black. Antennae of 

 five joints. Pygidium with two pairs of lobes ; median lobe largest, and notched 

 towards their distal extremity. There is a pair of broad, deeply fringed plates 

 between the median lobes ; and one of the same character between the median and 

 second pair of lobes ; and two others beyond them, the last being much the 

 smallest, often taking the form of a series of simple plates. 



Sah. : on uMcJimea aquilega. Royal Gardens, Kew, April 24th, 

 1897. 



Mr. Green has included in the genus Aonidia his A. hullata, an 

 insect which resembles my own in the character o£ the $ puparium ; 

 but it is anomalous in the genus, and should, I think, be removed.* 



In all other known species of Aonidia, the larval moult, and a 

 varying quantity o£ secretionary matter forms part of the puparium. 

 Gymnaspis is distinguished by the absence of both. 



ASPIDIOTUS BEITANNICFS, n. Sp. 



Aspidiotus hederce, Newstead, Ent. Mo. Mag. (1896), p. 279, nee Vallot. 



Puparium of adult ? circular, or approximately so, moderately convex. Colour, 

 dusky ochreous, with a broad smoky-brown central zone. Exuviae central, or a little 

 to one side ; those of the larva dark yellow or dull orange, secretionary covering very 

 thin. Second secretionary covering smoky-brown. Diam., •75-2 mm. 



Adult ? translucent yellow, short-ovate ; with distinct segmentation. Pygidium 

 (fig. 2) with four or five groups of circumgenital glands ; the anterior group 

 (rarely present) consists of 2-3, the anterior laterals from 7-10, the posterior late- 

 rals from 7-8. Vaginal opening a little cephalad of the centre. Subdorsal groups 



* Under date December 12th, 1897, Mr. Green writes— " there are certainly good grounds for 

 separating Aonidio, buUata from that genus, now that we have a second species to go with it." 



