276 LIST OF HOMOPTEROUS INSECTS. 



ward; costa convex and almost angular towards the base; veins 

 white. Hind wings vitreous. Length of the body l£ line ; of the 

 wings 3 lines. 

 a. Tasmania. From Mr. A. J. Smith's collection. 



Genus TRIOZA, Cat. Horn. p. 924. 



Trioza Galii, Cat. Horn. p. 928. 

 a, b. Ireland. Presented by A. H. Haliday, Esq. 



Genus APHALARA, Cat. Horn. p. 929. 



Aphalara Polygoni, Cat. Horn. p. 930. 

 a — c. Prussia. Presented by F. Walker, Esq. 



Fam. APHIDINA. 



Genus CHAITOPHORUS. 



Chaitophorus, Koch, Pjlanzenlause, 1. 



Aphis, Groups 1,11 and 20 (p.), Cat. Horn. 934, 950, 962. 



Aphis Aceris may be considered as the type of this genus ; 

 some of the species included in it differ much from the typical 

 form. 



1. Chaitophorus xanthomelas. 



Chaitophorus xanthomelas, Koch, PJfanzenl. 1, 1, pi. 1, f. 1. 

 Chaitophorus Aceris, var. (Kaltenbach), Cat. Horn. 950. 



2. Chaitophorus coracinus. 



Chaitophorus coracinus, Koch, Pflanzenl. 2, 2, pi. 1, f. 2—4. 

 Chaitophorus Aceris, var. (Kalt.), Cat. Horn. 950. 



On Acer platanoides. 



3. Chaitophorus leucomelas. 

 Chaitophorus leucomelas, Koch, Pflanzenl. 4, 3, pi. 1, f. 5, 6. 

 On Populus italica and P. nigra. 



