126 



E. E. GREEN AND F. LAING. 



Adult female broadly ovate, broadly rounded in front, bluntly pointed behind, 

 deeply incised on each side of the body immediately behind the cephalo-thoracic 

 area ; broadest across the metathoracic area, i.e., shortly behind the lateral incision. 

 The whole insect rigid, rather densely chitinous. Rudimentary antennae obsolete 

 or inconspicuous. Anterior spiracles with a small group of parastigmatic pores ; 

 posterior spiracles rather inconspicuous, with no pores. Segmental divisions of 

 abdomen marked by strong transverse folds which do not extend to the lateral 

 margins. A few longish spiniform setae at intervals along the margins of abdomen 

 (fig. 2, A). Pygidium not sharply defined ; its centre occupied by a large reticulated 

 area, the lacunae very irregular in size, form and disposition , no circumgenital 

 glands; dorsal pores small, but numerous (fig. 2, B). Margin of pygidium with three 

 pairs of lobes ; the median pair larger and more prominent, bluntl}- conical ; second 

 and third pairs rather shallow, the apex of each nearer the inner side, more or less 

 conspicuously notched on the free edge. There is a suggestion of a fourth lobe in 

 the form of a sub-angular marginal prominence. Squames minute and inconspicuous ; 

 a pair between the median lobes ; a second pair in the intervals between the median 

 and second lobes ; and one (possibly two) between the second and third lobes. There 



Fig. 2. Pseudaonidia aldabraca, sp. n. 



A, adult, X 30 ; B, pygidium, 

 pygidium, x 225. 



150 ; C, margin of 



are three conspicuous crescentic incrassations, within the margin on each side, 

 associated with short but rather stout paraphyses which extend inwards from the 

 interval between the median and second lobes and from the inner side of the third 

 and of the rudimentary fourth lobes. There is also a pair of short and more or less 

 confluent paraphyses between the median lobes (fig. 2, C). Length, 1 • 25 mm. ; 

 greatest breadth, 1 mm. 



Described from a single example. 



On bark of " Bois d'Amande," Aldabra Island, Se^'chelles [P. R. Dupont). 



This species is near to P. tesseratus, d'Emm., but differs principally in its 

 smaller size, and in the absence of the strongly cristate lateral margins of the 

 pygidium. 



Aonidia obtusa, sp. n. 



Female puparium consisting almost entirely of the enlarged nymphal pellicle, 

 transversely oval, flat, or very slightly convex, a narrow marginal area ornamented 

 with sutures running irregularly from without inwards and intertwining ; colour 

 varying from pale to dark brown, often thinly coated with white powdery secretion 

 over a wide marginal area, leaving only the centre bare (fig. 3, A). Pygidium recessed. 



