Chionaspis. 121 



CHIONASPIS SCROBICULARUM, sp. nov. 

 Plate XXXVII. 



Female puparia concealed within the glandular pits (scrobicula;) at the base 

 of the veins, on under-surface of leaves of Elceocarpus ainccnus, their presence 

 indicated by a white powdery secretion at the orifice of the cavities {fig. i). 

 Sometimes one of these pits is completely occupied by a single puparium 

 {fig. 2), or the cavity may contain several individuals of both sexes {fig. 3). 

 Occasionally an individual, crowded out of the cell, forms an exposed 

 puparium on the surface of the leaf. In such examples the puparium is of the 

 normal form, dilated behind. Examples in the pits are often distorted and 

 irregular in form from over-crowding. The yellowish pellicles are often nearly 

 concealed by a covering of waxy secretion. Colour opaque white. Length 

 I mm. Breadth 070 mm. 



Male puparium similarly situated ; usually several together ; oblong ; form 

 rather irregular {fig. 4) ; white, with the colour of the contained insect showing 

 indistinctly through the scale; scarcely carinate, a median ridge represented 

 only by a line of more opaque secretion ; the whole puparium dusted over with 

 mealy matter. In exposed examples the carinas are rather more distinct. 

 Length i mm. 



Adult female {figs. 6, 7) bright gamboge yellow ; extremity of pygidium 

 reddish. Form normal ; narrowed in front ; broadest across the median 

 segments (metathorax and first abdominal). Anterior spiracles with a small 

 and inconspicuous group of parastigmatic glands. Margins of metathorax and 

 abdominal segments with large groups of oval pores. Pygidium {fig. 8) broad ; 

 median lobes very promment, their inner edges in close apposition, the two 

 together forming a regular semicircle with finely crenulate margin. First pair 

 of lateral lobes very minute, duplex ; other lobes obsolete. Squames spiniform, 

 moderately stout and long ; one or two on each of first to fourth spaces, and 

 three on base. The usual marginal spines springing from definite thickened 

 patches. The pore-bearing prominence on first and second lateral spaces is 

 produced into a spine-like process on one side. Dorsal pores numerous ; very 

 irregularly disposed. Smaller circular pores are scattered over the ventral 

 surface, communicating with short capitate filiform ducts similar to those 

 opening into the squames. Two oblong chitinous thickenings of the dorsal 

 surface on each side immediately exterior to the circumgenital glands, and 

 conspicuously thickened lines running upwards from the extremity on the 

 ventral surface. Circumgenital glands in five groups ; median 11 to 20 ; upper 

 laterals 20 to 27 ; lower laterals 16 to 22 ; the upper laterals always with the 

 larger number. Length 075 to i mm. Breadth about 0*50 mm. 



Adult male bright reddish ; of normal form. Terminal joint of antenna 

 {fig. 9) shorter than ninth ; broad at base ; the narrowed apical portion con- 

 spicuously darker after staining : a curved knobbed hair at apex. Foot with 



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