10 LECANIINJL 



c. Female antennae and legs well developed. 

 cc. Female very elongate. 



(ill) . . . SlGNOEETIA (4). 



ccc. Female not very elongate. 



' (IV) . . . LlCHTENSIA (5). 



B. Females covering themselves with a glassy secretion. 

 a. Secretionary covering extending considerably 



beyond the body of the female in the form of 

 a seven-rayed star. 



(v) VINSONIA (7). 



C. 'Females covering themselves with testudiform 



plates of wax. 



(vi) . . . CEROPLASTES (6). 



D. Females naked. Ovisac behind and partly beneath 



the posterior extremity of the body. 



(vn) . . PULVINAEIA (8). 



E. Females naked. No ovisac. 



a. Females retaining legs and antennae. Old adults 



hollow beneath. 



(vm) . . . LECANIUM (9). 



b. Female without antennae and legs ; body with two 



internal ovarian pouches. 



(ix) . . . PHYSOKEEMES (10). 



GENUS ACLEEDA (Signoret). 



The diagnostic characters of this genus are derived 

 chiefly from the larvae, as the adult females are ex- 

 cessively degenerate and offer few differential char- 

 acters. The genus was established by Signoret to 

 include his Aclerda subterranea, in which the adult 

 female i$ characterised by the entire absence of antennae 

 and legs. As its name implies, it is a subterranean 

 species, and is found in Southern France and Italy. 

 A. Berlesii, Buffa, is the only other known European 

 species. It attains a length of 9 mm., and is very 

 abundant on Arundo donax in Italy. Mr. Cockerell 

 informs me that his Sphserococcus (Pseudolecanium) 



