British species of PsyllidcB. 535 



Species 5. Psi/lhi liippopltaes. 



Psijlla IJippophaes, Forst. Verh. Ver. Rheinl. v. 73, 12; 

 Letli. Hem. Nord, ed. ii. 91, 14; Psylla Alaterni, 

 Forst. Verh. Ver. Illieiiil. v. 97, 5 ; Psijlla Hartigii, 

 Flor, Rhyn. Livl. ii. 469, 8. 



Pale yellow or greenish-white. Face : lobes very long, 

 clothed with fine, pale hairs; base broad; exterior margin 

 concave, inner margin straight. Antennce yelloAv; 4 — 8 

 joints narrowly dark broAvn at the apex, 9 — 10 dark brown 

 or black. Elytra very pale testaceous, transparent, nerves 

 pale; costal stigma almost obsolete. 



Head pale yellow or greenish-white. Croion : posterior 

 margin concave. Face: lobes very long, clothed with fine 

 pale hairs ; base broad ; exterior margin concave ; inner 

 margin straight, from the middle to the slightly narrowed 

 and rounded apex almost cylindrical. Antennce yellow, 

 reaching to beyond the base of the stigma ; 4 — 8 joints 

 at the apex narrowly dark broAvn, 9 — 10 dark brown or 

 black. 



Thorax : pro- and meso-notum pale yellow or greenish- 

 white sometimes intei'mixed. Elytra very pale testaceous; 

 nerves fine, pale; external basal cell clear; costal stigma 

 almost obsolete. Eegs yelloAV. Claws brown. 



Abdomen pale green. 



Length 1-|- line. 



An easily-distinguished species from the shape of the 

 frontal lobes and the almost obsolete stigma. 



Not uncommon on the sea buckthorn i^Hippophae 

 rhamnoidcs), at Deal, in August. 



Forster received the above insect from Mr. Haliday 

 under the name o^ Alaterni, and so described it. In his 

 foot-note, Forster says he has doubts as to Avhether this 

 species may not be the Psylla Rhamni, Schrank. That it 

 is impossible to say, I give that author's description from 

 the "Fauna Boica," ii. 141, 1249 (1861):— 



" Chermes Rhamni. 



" AVohnort am Kreugbeerstrauclie. 



" Im Jimius. 



" Anmerk. Die Larve griin, flachgedriickt, schildformig, 

 mit durchscheinigen Leibe, der Rand der Fliigelscheiden 

 und des e-erundeten Hinterleibes gefranzet. Das vollendete 

 Insect koniie icli iticJitr 



