232 



[October, 



conservatory during the winter, but bedded out in summer. The 

 insects have been noticed upon the plant for several years. 



Signoret places this species in his fifth series of Lecanium, to- 

 gether with L. ct/cadis, L. depressum and L. testudo. It agrees with 

 depressum in having large polygonal dermal cells (fig. 4), as may be 

 well seen in specimens that have been boiled for some time in caustic 



^7«^ 



h l4-t> 



J^- 



potash ; whereas unmacerated or insufficiently treated specimens will 

 show only the large oval nuclei (fig. 4«). The marginal hairs are 

 simple, with bulbous bases. The three stigmatic spines are sharply 

 pointed, the median one about three times as long as the others 

 (fig. 45). 



MiMICET OF COCCID SCALE BY A LEAF MINER. 



While hunting for scales of Aspidiotus zonatus on oak, I came 

 across numerous specimens of what I supposed to be a small species 

 of Chionaspis on the under-surface of the leaves. There was a minute 



pellicle at the narrow anterior extremity ; 

 a suggestion of a second pellicle ; and a 

 delicate greyish scale widening behind 

 (fig. 5). I was congratulating myself 

 upon the discovery of Comstock's Chio- 

 naspis quercus in England, and confidently 

 expected to find the single undivided 

 median lobe peculiar to that species ; but, 

 ^/■■^ upon dissection, instead of a female 

 Chionaspis,hene&th the supposed Coccid scale was a minute caterpillar. 

 In fact, my imaginary Chionaspis proved to be the work of the mining 



