the Coccid genus Leucaspis. 



465 



appreciated by reference to figs. 3, 4-a, 4-6, and 5. These 

 differences are further shown in the annexed comparative 

 table : — 



The pelhcle of pusilla (fig. 5) is shorter but propor- 

 tionately broader ; the large lunate pores and marginal 

 incisions are conspicuous almost to the base of the pygidial 

 area, there being usually 9 of them beyond the lateral 

 lobe ; while, in perezi, not more than 4 are clearly notice- 

 able in the corresponding position, the remainder being 

 obscured by a thickening of the margin. 



Leucaspis salicis, sp. nov. 



Female puparium comparatively short and broad. Pellicles dark 

 brown : larval pellicle exposed : nymphal pellicle thinly veiled by 

 a greyish-white secretionary covering which extends slightly beyond 

 the margins of the pellicle itself. Length PO mm. Breadth 

 0'65 mm. 



Male puparium ochreous white, the single pellicle ochreous. 

 Proportionately narrow. Length PO mm. Breadth 0*45 mm. 



Adult female enclosed within the nymphal pellicle : broadly 

 oval (fig. 10), constricted at base of pygidium. Rudimentary- 

 antennae with 3 or 4 stout setae. Rostrum large and conspicuous. 

 Anterior spiracles close to the rostrum, one on each side : one or two 

 isolated pores representing the parastigmatic glands. Pygidium 

 (fig. 11) with 4 very small and inconspicuous lobes which scarcely 

 project beyond the margin and are often quite indistinguishable. 

 There are no fimbriate squames or marginal fringe of any kind ; but 

 a few minute spines, on circular bases, are set at intervals along the 

 distal half of the pygidium. Anal orifice rather inconspicuous, 

 central. Circumgenital glands in a scattered row (containing about 



