British species of PsyUidcB. 550 



mesonotum reddish-yellow, or yellowisli-red ; anterior por- 

 tion with a large more or less dark red-brown streak on each 

 side, not reaching the posterior margin ; posterior portion 

 with two more or less dark red-brown n -shaped charac- 

 ters ; scutelliforra process usually yellowish, with a more 

 or less distinct brown or reddish-brown spot in the middle. 

 Elytra clear, transparent, apex acute ; dorsal margin for 

 about f its length from the base somewhat moderately and 

 regularly curved or slightly flattened in the middle, from 

 thence to the apex more abrupt ; radius long, basal half 

 almost straight, from thence curving round towards, and 

 running parallel Avith, the costal margin, until just before 

 its termination, when it suddenly recurves ; nerves at the 

 base white, apical half yellowish or brownish. Legs 

 yellow. Thighs along the upper margin with a broadish 

 black streak, not reaching to the base. TibicB : 1st and 

 2nd pairs fuscous-yellow or dark broAvn, 3rd pale yellow. 

 Tarsi: 1st and 2nd pairs more or less dark brown, 3rd 

 yellow ; 2nd joint at the apex frequently brownish. 



Abdomen above black, beneath pale yellowish-green 

 or green, becoming white or bone white after death. 



Length 1^ line. 



This insect stands nearer to T. urticce than any other 

 of our at present known to me British species, but differs 

 from it in the colom-ation of the antennae, in having entirely 

 black face-lobes, a long and peculiarly-formed radius much 

 nearer to the dorsal margin throughout its entire length 

 than is usual, of itself an excellent distinguishing character, 

 and the abdomen beneath white after death, apart from 

 other differences in the genitalia. 



I have only seen a few examples taken by jMr. Douglas 

 at Addington in October, both on fir and birch. 



Genus Aphalara. 



Head much broader than long. Croion considerably 

 deflected, divided down the centre by a channel and with 

 a deep fovea on each side ; anterior margin more or less 

 Jll-shaped ; posterior margin moi-e or less angulate. 

 Ocelli minute, placed as in the other genera, the frontal 

 one not perceptible from above. Face without lobes. 

 ^nfe;2n(B 10-jointed, short; 9 — 10 slightly thickened; all 

 the others as in Psylla. Eyes placed on the side of the 

 head; inner margin almost parallel with the central 

 channel; outer margin very convex. 



