448 New species of Psyllidce. 



brownish black ; marginal nerve fuscous or fuscous- 

 brown ; base with a lozenge-shaped dark fuscous or black 

 patch, and a very narrow \/-shaped deep black band 

 across the inner marginal nerves of the. basal cells; 

 apices of the costal a-nd dorsal cells almost in a line with 

 each other ; radius very wide at -the base, almost touch- 

 ing the upper arm of the cubitus, becoming convex 

 towards the costal margin from before the middle, and 

 joins the costal (post-costal) nerve just'.before reaching 

 the apex; stem (vena ulnaris) slightly curved after 

 leaving the base ; cubitus upper arm long, three times 

 longer than the lower one, convex towards the costal 

 margin ; lower arm short, slightly curved towards the 

 base ; inner branch a little longer than the arm, curved 

 towards the base ; distance between the apices of the two 

 branches about equal to each other ; clavus small, nar- 

 row ; suture very fine, a-lmost imperceptible in certain 

 lights ; nervelets distinct, black. Legs brownish yellow, 

 thickly clothed with very short, stififish, semierect, dark 

 hairs. Thighs : extreme apex on the inside generally 

 with a minute black spot. Tarsi black above, beneath 

 red. Abdomen, <? , above dark brown ; base with a yel- 

 lowish or brownish yellow patch ; genital plate dirty 

 fuscous-white, slightly hairy ; viewed from the side, the 

 posterior margin produced into a short black claw or 

 tooth ; inner margin widest at the apex, broadly rounded ; 

 processes brown, short, stout, clavate, reaching to about 

 one-half the height of the genital plate. Abdomen, $ , 

 above, dark brown, stout, broadly rounded posteriorly ; 

 genital plates, viewed from above or beneath, short, thin ; 

 viewed from the side, the base not equal to the length ; 

 lower plate shorter than the upper one. Length, 1 line 

 (Paris).. 



This species forms large galls on the shoots and 

 branches of Sajnuiii aacuparium, Jacq., var. salicifolium, 

 Knth. (= Exccecaria higlandidosa, Miill.). 



Ildh. Buenos Ayres and Uruguay. 



