British Homoptera-Cicadina. 117 



apex of the axillary nerve to the first apical area a very oblique pale 

 band ; first subapical area subtriangnlar, reaching the costa ; nerves 

 punctured, thick and black except in the pale baud ; costa slightly 

 flattened vertically, the tubercles scarcely perceptible. Abdomen 

 above black, hind margins of the segments narrowly yellow. Legs 

 pale, hmd tibia; narrowly black on both the outer and inner sides, 

 thighs frequently with a black stripe. 



? . Face between the eyes much clouded and speckled with dark 

 brown or black, cheeks bare. Elytra hyaline with a faint yellow- 

 brown tinge, and only faint traces of the pale band ; nerves dark 

 brown or black except in the pale band ; costa scarcely flattened 

 vertically, without tubercles. Legs pale, all the tibiiE generally 

 narrowly black on both the outer and inner sides. Length, 

 5i — 6 mm. 



On Salix triandra; local. Kirschbaimi is the only 

 author known to me who satisfactorily distinguishes 

 between this species and the last, but his /. similis 

 is, according to types from Dr. Puton, a form of this 

 species, in which the pale portions of the costa in the 

 male, and particularly the roundish spot at the apex of 

 the costal area, are bright yellow : the females of the 

 two insects appear identical. I have not seen native 

 examples of this form. 



3. Idiocerus Herricldi, Kirschb. 



Idiocerus Herrichii, Kirschb., Cicad., 153, 1 ; J. Sahl., 

 Not. Fenn., xii., 139, 1. 



^. Face greyish yellow, disc above between the eyes with a 

 dark fuscous cloud, near each eye a black triangle and a few small 

 black spots, edges of the frons below the eyes with a black line, 

 clypeus black, cheeks with a dense long silvery pubescence. Pro- 

 notum pale greenish grey mottled with fuscous, a wide central line 

 pale. Scutelhim pale greenish grey, marked as in aclustus. Elytra 

 hyaline with a greenish grey tinge ; nerves stout, chequered with 

 black and white, punctured, and having a row of fine short hairs 

 on each side ; costa slightly flattened vertically, but without tubercles. 

 Abdomen above black, hind margins of the segments narrowly pale. 

 Legs pale, feinora and tibiae striped with black, intermediate tibiae 

 with a short black line on the outer side at the base. 



5 . Differs from the male in having the cheeks scarcely per- 

 ceptibly pubescent, a row of black points down each side of the 



