1899.] NATURAL SCIENCES OF PHIEADELPHIA. 273 



Legs of the same Specimens. 



P. cnpanice, aurantii and jysidii are superficially similar, and are 

 liable to be confused. In cujmnice and j^^^dii the marginal spines 

 are about 21 /Jt long, and more or less fimbriate at the ends; in 

 aurantii they are simple, only those next to the spiracular incisions 

 being slightly flattened and inclined to be fimbriate at the ends. 

 Ou the other hand, by the antennae aurantii and ciqmniie are close 

 together, and psidii differs greatly by the long 3, as also in the very 

 long tibia. 



The marginal spines of flavicam are sharp and quite simple; 

 those of ribesice are also quite simple, very slender, the longer ones 

 43 //. 



The marginal spines of the " camellicola'^ are simple, very 

 slender, 39-60 n apart, and 34-47 fj- long. 



The bigelovice has the antennae practically as in " camel/ icola,^' 

 but the legs will distinguish it. 



The species marked " camellicola ," may possibly be the insect 

 intended by Signoret, but his description does not agree. I have 

 considered it rather a form of my P. simulans ; vide Canad. 

 Entom., 1895, p. 258. 



Aulacaspis coccois (Licht.). 



Diaspis coccois Licht., Bull. Soc. Eut. France, 1882, p. xxxvi. 



This is presumably the insect afterwards described by Morgan as 

 D. teniaculatus. The exuviae are distinct and almost central. 



Chrysomphalus aonidum (Linn.)- 



Coccus aonklum L., Syst. Nat , Ed. x, p. 455. 



The description reads: " Habitat in Asire arboribus semper- 

 virentibus ut in Camellia, aliisque. Prajcedenti [Jiesperidum'jm.mor, 



18 



