EHOPALOSIPHUM DIANTHI. 15 



body increase in diameter from the protliorax, and then 

 widen much towards the middle of the abdomen ; 

 again, these rapidly narrow towards the tail, which 

 last organ is obtuse, and of a yellow colour. Corni- 

 cles large, thin at their origin, but dilated in the 

 midst. They generally are full of yellow oil-globules. 

 Legs and antennae green. 



Taken at Wanstead in June ; at Albery, Herts, in 

 July, and in both cases on the berbery, Berber is 

 communis. 



Winged viviparous female. 



Incli, Millimeters. 



Expanse of wings 0'260 6*60 



Size of body O-OOOXO'OSO 2'27 XO'76. 



Length of antenna 0-070 1-77. 



„ cornicles 0'015 0-38. 



Wholly green. Head browner green. Ocelli very dis- 

 tinct. Eyes red, vertex pointed. Antennas pale green, 

 joints smoky at their tips. Prothoracic band and 

 thoracic lobes pale brown. Abdomen, cornicles, legs 

 and tail, green. Tarsi smoky grey. Wings broad. 

 Cubitus and stigma green. Other veins dark brown. 

 The rostrum reaches to the third coxa. The corni- 

 cles are skittle-shaped, with slight attachments. As 

 this insect somewhat differs from the rest of the genus 

 EJiopalosijjhviii, Mr. Walker proposed for it a new genus, 

 Liosoma/phis ;^ but this variation seems to me to be 

 hardly sufficient to separate it thus from its congeners. 



Rhopalosiphum DIANTHI, Schrauk. Plate XLIII, figs. 



1—4. 



Aphis dianthi, Schr., Kalt., Walk. 



— jpersiccB, Puceron dii peclier, Morren. 



— rapcG, also A. floris rapcBy and diihia ? Curt. 



— vastator, Smee. 



* Walker, ' Zoologist,' 2nd series, vol. iii, p. 1119. 



