548 IMr. John Scott's Monograph of the 



of the other nenes and the spaces between with a black 

 spot. 



Head reddish-yellow. Croivn: posterior margin some- 

 what deeply concave, margins of the central channel and a 

 space round the ocelli ]ialc yellowish-white. Face: lobes 

 entirely pale yellowish-white, or the apex reddish-yellow, 

 shorter than the crown down the centre, and slightly 

 divergent at the apex ; base broad; exterior margin sloping 

 to the bluntly-rounded apex, inner margin straight. An- 

 tennce yellow, reaching beyond the base of the stigma; 

 ."^rd joint faintly, 4 — 8 distinctly black at the apex, 9 — 10 

 black; 4 — 6 of almost equal length, and each a little 

 shorter than the 3rd. 



Thorax: pronotnm pale yellowish-white, with a small 

 reddish-yellow spot on each side behind the ocelli; meso- 

 notum reddish-yelloAV ; anterior portion with a longitudinal 

 central line, posterior margin and a transverse line before 

 the same pale yellowish-white ; posterior portion with a 

 broadish longitudinal line on each side of the centre, a 

 finer curved one exterior, and the lateral margins pale 

 yelloAvish-white ; the curved lines ap]iear to form a circle 

 enclosing two I-shaped characters. Eli/tra somewhat clear 

 and transparent, nerves pale yelloAv; costal stigma yellow, 

 wide and long; apex of the clavus and the adjoining nerve 

 with a broad black dash ; apex of the remaining nerves 

 with a small black spot, and alternating with these are four 

 short, black streaks j^roceeding fi'oni the marginal nerve. 

 J^egs yelloAv, or faintly reddish-yellow. Tarsi: 2nd joint 

 at the apex narrowly and claws brown. 



Abdomen above in the 2 red, down the centre broadly 

 dark brown, sides broadly pale yellowish-white. 



Length li line. 



I met with two ? examples, in July and September, 

 1862, which I su])pose must have been captured by 

 sweeping. Dr. Po^ver has also taken a single specimen at 

 I^Iickleham in October. Forster records having received 

 it from the late Mr. AYalker, and there is a specimen in the 

 British Museum confirminjx this statement. 



Species 19. Psylla rhamnicola. 



Red or orange red with red-brown streaks on the meso- 

 tiotum. Face: lobes as long as or a little longer than the 

 cro^vn down the centre ; base broad ; exterior margin 

 sloping rapidly for two-thirds its length, inner margin 



