76 LKCAXIUM. 



or atrophied so as to render the articulations indistinct, 

 the legs being mere colourless rudiments, or entirely 

 absent. Moreover the body of A. punctatus, Ckll., is 

 covered with a thin secretion, and that of A. pinguis, 

 Maskell, with an oily coat. 



In the second the antennas and legs are also rudi- 

 mentary or atrophied. N. imbricatum, Ckll., one of the 

 species included in this division, is covered with a 

 fragile coat of glassy secretion. 



In the third the antennae of the female are as in one 

 and two, but in M. lanigerus, Hempel, the body is 

 covered with a mass of secretion. 



In the fourth the female is very convex, subglobular, 

 with the antennae and legs rudimentary. 



Not one of the insects included in the foregoing 

 divisions has been found within the British Isles, so 

 that they need not be further discussed in this work. 

 But the genus Lecanium has been still further divided 

 into seven or eight subgenera, including the species 

 which have been found in this country. Seeing that I 

 have already referred to the genus as a whole under 

 the old name Lecanium, it would, I think, be extremely 

 unwise to adopt any of the subdivisions in this work, 

 especially as many of the characters are extremely 

 trivial and inadequate, and would tend rather to em- 

 barrass the student than otherwise. The new names 

 have, therefore, been placed as synonyms under the 

 various species to which they refer. 



SYNOPSIS or SPECIES. 



A. Dermis of females with simple glands or cells, and 

 usually a very delicate reticulation. 



A. Adult females more or less flat or low convex, not 



highly chitinised. 

 a. Form slightly elongate ; antennae of seven joints. 



(l) . . . HESPEEIDUM. 



1. Form very elongate ; antennae of eight joints. 



(n) .... LONGULUM. 



