Chionaspis. i^l 



This insect is doubtfully placed in the genus Chionaspis. I await the discovery 

 of the male scale before finally settling its position. I have avoided founding 

 the specific name upon the seven-grouped circumgenital glands, as this character 

 may eventually prove of generic value. The name simplex is in reference to 

 the margin of the pygidium, which is devoid of the usual fringe of lobes and 

 squames. 



(Since writing the above I have received from Mauritius (from M. d'Emmerez 

 de Charmoy) examples of an insect that can only be separated from Ch. simplex 

 by the absence of the supplementary circumgenital glands. In every other 

 particular — including the habitat — the two forms are identical, and are clearly 

 very closely allied. A new genus, therefore, can scarcely be founded upon the 

 character of the gland groups in Ch. simplex.) 



In some particulars this aberrant form approaches Aspidioius {Co7nstockiella) 

 sabalis. It also possesses characters that may associate it with Odonaspis (a 

 sub-genus of Aspidioius). 



It is remarkable that so many Coccidce from this same habitat (beneath the 

 leaf sheaths of bamboo) should show abnormal characters ; e.g., Aspidioltis 

 secrctus., A ijii/silaltes, and the present Chionaspis simplex amongst the 

 Diaspidina. Other peculiar forms will be noticed amongst the Lecaniincs and 

 Dactylopiince. 



EXPLANATION OF PLATE LVII. 



Chionaspis simplex. 

 {All figures .^ except No. i, 7)wre or less enlarged^ 



Fig. I. Twig of bamboo, with insects in situ, nat. size. 



2. Female puparium, dorsal view. 



3. ,, „ ventral view. 



4. Adult female, ventral view. 



5. „ „ pygidium, ventral view. 



6. „ „ „ dorsal view. 



7. Second pellicle of female scale. 



