The Zoologist — August, 18GS. 



1331 



aa. Veins of the fore wings brown, rather stout ; first and 

 second oblique veins wholly separate from each other. 

 a. Sixth joint of the antennas longest. 



* Third joint of the antennae longest; fourth, fifth and 

 sixth of equal length. 

 f Third joint of the antennae shorter than the fourth 

 and fifth together. Abdomen bare, 

 ft Third joint of the antennae as long as the fourth and 

 fifth together. Abdomen woolly. 

 AA. Sixth joint of the autennae shorter than the fifth. 



a. Third and fifth joints of the antennae of equal length. 

 Abdomen bare. ...... 



aa. Third joiut of the antennae longer than the fifth. Abdomen 

 woolly. ...... 



AA. Oblique veins of the hind wings proceeding connectedly from 

 the submaiginal vein. 

 A. Sixth joint of the antenna? as long as the fifth. 

 AA. Sixth joint of the antennae longer than the fifth. 



a. Fifth joint of the anteuuae almost twice longer than the fourth. 

 a. Joints of the antennae smooth. Hind side of the stigma 

 not angular. ...... 



aa. Joints of the antennae ringed. Hind side of the stigma 

 angular. ...... 



aa. Fourth and fifth joints of the antennae nearly equal in length 

 a. Hind side of the stigma not angular. 

 aa. Stigma angular at the base of the fourth vein. 



* Abdomen bare. . . . . . 12. vesicarius. 



** Abdomen woolly. .... 13. laciucarius. 



3. semilunarius. 



4. follieularius. 

 5. filaginis, 



6. Boyeri. 

 7. carulescens. 



8. ajfinis. 



9. Colutece. 



10. bursarius. 



11. Spyrathecce. 



Genus 3. Tetraneura, Hariig. 



Antennae short, six-jointed; third joint longer than any of the 

 others. Wings deflexed. Fore wings with four simple oblique veins. 

 Hind wings with one oblique vein. 



Type, Aphis Ulmi, Geoffr. 



Genus 4. Aploneura, Passerini. 



Antennae with the sixth joint longer than any of the others. Wings 

 horizontal. In other characters like Tetraneura. 

 Type, Tetraneura Lentisci, Passerini. 



Tribe 4. Rhizoiuin,e, Passerini. 



A. Third joint of the antennae much longer than the fourth. 

 AA. Third and fourth joints of the antennae nearly equal in length. 



1. FORDA. 



2. Rhizobius. 



