The Zoologist— January, 1868. IO 53 



Genus 2. Phoropon, Passerini. 

 Typical species, Aphis Hamuli, Schrank.-Antennee on a frontal 

 tubercle; 1st pint furnished on the inside with a stout tooth. Front 

 flat between the antem/a. Nectaries very long, cylindrical or slightly 

 clavate. In other characters like Siphonophora. 



A Frontal tubercle with a stout tooth. _ 



A Viviparous apterous female pilose; the hairs capitate. Viviparous 



Xed female with a black dorsal spot nod with a clavate ta.l. 1. Cannabu. 

 AA Viviparous apterous female smooth or slightly pilose; the hairs 



simple. Viviparous winged female with slender brown dorsal ^ ^^ 

 bands and with an acute tail. 

 AA. Frontal tubercle not dentate. 

 A. Nectaries cylindrical. 



A . Viviparous winged female with greenish brown dorsal bands. ^ ^^ 



Nectaries tortuous. " .' 



AA . Viviparous winged female with a large black dorsal spot. ^^.^ 



not tortuous . 5. Galeopsidis. 



A A. Nectaries clavate. 



1. P. Cannabis, Passerini.-On Cannabis sativa. Not recorded as 



British. , „ „/• 



o P ita^, Schranh.-Passerini observes that the synonym of 



Fon.co.ombe should be excluded from this species. Its history is 



still incomplete ; it migrates from the sloe to the hop, and dwells there 



for awhile, and is called the hop-fly, and then returns to the sloe. The 



Aphidin* have a greater capacity for modification than ,s possessed 



by other insects, and in the study of them it is requisite that each 



form should be traced to its cessation or to its succession in the egg 



state, and that a division should be made between the permanent 



species and the annual or apparent species whose forms are varied by 



their migration and food. 



3 P Inulcs, Passerini.-Passerini suspects that in mentioning 

 Tuesilago Farfara and T. Petasites as the food of P. Galeopsuhs I 

 have confounded P. Inula with it. Aphis Inula (< Zoologist, vn. xlv. 

 — 18491 does not belong to this genus. 



4 P Carduinum, Passerini.-Passerini gives a very short descrip- 

 tion of this species. It appears, as he says, to be identical with my 

 Aphis Carduina. (To be conlin ued.) 



