233 



larva of one of the Micro-Lepidoptera* The terminal pellicle resolved 

 itself iuto the empty egg-shell vacated by the caterpillar ; the separated 

 cuticle of the leaf formed the greyish scale, and the collection o£ 

 frass near the anterior extremity suggested a concealed second pellicle. 

 The mimicry was complete, though doubtless unconscious and acci- 

 dental. 



Bearsted, Kent : September, 1895. 



OBSERVATIONS ON COCCID.E (No. 13). 



BY R. NEWSTEAD, F.E.S., 



CUBATOH OF THE OROSVENOB MUSEUM, CUESTER. 



Chionaspis bilobis, n. sp. 

 ? adult dull crimson (after death). After treatment with caustic potash, 

 black ; but on examination with transmitted light, blue-black : this colour is appa- 

 rently due to ova contained in the body, as older individuals without ova were 

 rendered almost transparent in the potash. More or less pyriforni, narrowed 



in front. The pygidium (fig.) 

 has the five groups of spinnerets 

 distinctly separated ; the an- 

 terior of 10 ; the anterior laterals 

 of 14 ; the posterior laterals 10 

 to 15. Median lobes contiguous, 

 much smaller than second pair ; 

 the latter, the largest, are united 

 to the third pair. There are 

 two short plates between the 

 first and second pairs of lobes ; 

 and following tlie third lobe are two more, and beyond tliem several others. Pro- 

 jecting a little beyond the third lobe are two very slender spines. Within the 

 margin are several scattered pores. 



Scale of the ? pure white, more or less pyriform, suddenly widened immediately 

 behind the second moult ; or elongated witli sides parallel ; very convex ; larval and 

 second moult yellowish, or frequently pure white. 

 Long, 1"5, wide, "75 mm. 



Scale of the <? and larval moult pure white, with distinct lateral and central 

 carince. Many of the specimens have numerous very coarse waxen threads attached 

 to them, indicating a loose covering, as Diaspis Boisduvalii, Sign. 



Hab. : on Dcverra scoparin, Biskra, Algeria, March 2nd, 1895. 

 Collected by the Rev. A. E. Eaton. 



The continuity of the lobes aa indicated above is the distinguish- 



DipUra?—^.. Ml li. 



