1300 The Zoologist— July, 1868. 



A. Body dingy lutescent or greenish. Abdomen rust-colour or black about 



the nectaries. ...... 2. Fceniculi. 



AA. Body green, powdered. Abdomen not rust-colour nor black about the 



nectaries. ....... 3. Xylostei. 



Genus 9. Myzocallis, Passerini. 



Viviparous apterous female and pupa with a hairy or bristly 

 dorsum. Nectaries very short, tubercle-shaped. In other characters 

 like Aphis. 



Typical species, Aphis Coryli, Goetze. 



A. Apterous form and pupa with a tuberculate setulose dorsum. . 1. Ononidis. 

 AA. Apterous form and pupa wilh the dorsum pilose or setulose, not tuberculate. 

 A. Winged form wilh the dorsum tuberculate at the base. 



a. Abdomen bare, with four dorsal tubercles. . . 2. Quercus. 



aa. Abdomen with white down, with one dorsal tubercle. . 3. Quercea. 



AA. WiDged form with the dorsum not tuberculate. . . 4. Coryli. 



Genus 10. Cladobius, Koch. 



Antenna; hairy ; seventh joint at least as long as the sixth. 

 Nectaries cylindrical, at least twice longer than thick. 

 Typical species, Aphis populea, Kaltenbach. 



A. Nectaries rather long, almost reaching the tip of the abdomen. 1. Lanlana. 



AA. Nectaries very short, remote from the lip of the abdomen. . 2. populea. 



Genus 11. Chartophorus, Koch. 



Antennae setaceous, distinctly pilose; seventh joint longer than the 

 sixth. Nectaries obtuse, very short, shorter than their thickness. 

 Tail wart-shaped. 



Typical species, Aphis Aceris, Fabr. 



A A. Abdomen white, with black bands. . . . 1 . leucomelas. 



AA. Abdomen green or black. 



A. Abdomen ^rass-green, with darker spots or points in longitudinal series. 



a. Abdomiual spots confluent, forming two curved stripes. . 2. Caprea. 



aa. Dors.il and marginal points distinct, the former in two scries. 3. salicivora. 

 AA. Abdomen green with darker bands or black. 



a. Stigma dingy luteous-green, bordered wilh brown. . 4. Accris. 



aa. Stigma wholly brown or black. 



a. Abdomen green, wilh black bands and wilh black marginal points. 



* Veins of the fore wings clouded with brownish black. . 5. Vitellines. 

 ** Veins of ihe fore wings not clouded. ... 6. versicolor. 



aa. Abdomen black above. 



