British species of Psyllidcc. 561 



Abdomen black ; sides and posterior margin of tlie seg- 

 ments narrowly yellow ; genital segments of both sexes 

 yellow. Length 1 line. 



The broad appearance of this species, its white elytra, 

 with the dark atoms and band before the apex, render it 

 unmistakeable. 



Flor gives its size as greater than A. j^olygoyii, but this 

 is evidently an error. Dr. Power has taken it somcAvhat 

 commonly at Weybridge from June to October, and I have 

 an old example from Mr. T. Wilkinson, taken near Scat'- 

 borough. 



Species 2. Aphalara polygoni. 



Aphalara polygoni, Forst. Verh. Ver. Kheinl. v. PO, 3 ; 

 Flor, Rhyn. Livl. ii. 534, 2 ; Leth. Hem. Nord, ed. 

 ii. do, 4. 



Orange red or reddish-yellow, with pale streaks on the 

 mesonotum. Anten na ^orao.'wXwit dusky yellow ; 1st joint 

 entirely, and 2nd at the base, reddish-brown or brown ; 

 9 — 10 black. Elytra ])ale testaceous or yellowish ; apex 

 generally somewhat fuscous ; dorsal margin with a short 

 streak before the apex of the clavus, and margin of the 

 adjoining nerve, black. 



Head : croion red or orange red ; margin of the central 

 channel at the base frequently whitish. Antenna some- 

 "what dusky yellow ; 1st joint entirely, and 2nd at the base, 

 reddish-brown or brown ; 9 — 1 black. 



Thorax: /;rowo^«<??i generally pale ; frequently with a small 

 red or brownish spot in the middle, and the foveas brown ; 

 viesonotinn orange red or reddish-yellow ; anterior portion 

 with a longitudinal central line, and the sides Avhitish or 

 yellowish-white ; posterior portion with four whitish or 

 yellowish-white longitudinal lines ; lateral margin Avhitish 

 or yelloAvish-white. Elytra pale testaceous or yellowish, 

 apex generally somewhat fuscous; nerves pale or dark 

 brown in certain positions, appearing as though margined 

 with yellowish ; dorsal margin, before the apex of the 

 clavus, with a short black streak, and the adjoining nerve 

 margined on both sides with black ; sometimes these last cha- 

 racters are obsolete ; clavus, apex frequently Avhite. Legs 

 pale brownish-yellow or yelloAv. Thighs on the inside, near 

 the upper margin, generally Avith a broAvnish or blackish 

 longitudinal streak. Tarsi : 2nd joint at the apex fus- 

 cous. Claws brown. 



