2G J"iy' 



(lark nerves between the interruptions. Tlio dark colour on the 

 nerves is o£ very uneven width, and causes them to appear as if 

 irregular in thickness. 



Not uncommon throughout the south of England on sallows 

 and poplars, at the end of July and August. 



Species 3. — Idiocerus H-album, Fieb. 



Tdiocerns S-aJhiim, Fieb., Yerhandl. d. k. k. zool.-bot. Gresell., 455, 

 11 (ISGS). 



(J. -E/jz/rri! pale brownish or fuscous-yellow ; coriiim — nerves not 

 coarsely granulated as in I. Ufuratus ; first transverse nerve and the 

 longitudinal nerves for a short distance on either side of it white, and 

 forming an I shaped character. 



Head pale yellow or grcciiisli-yellow. Crown in front, with a pale brown spot near 

 each eye. Face and clypeus yellow. 



Thorax : pronotum more or less clouded with fuscons-grey, anterior margin some- 

 what broadly, lateral and posterior margins narrowly, and a central longitudinal 

 line, yellow ; near the anterior margin, and in a line with the inner margin of 

 the eyes, a yellow spot. Scutellum yellow ; near each basal angle a triangular, 

 black spot, and in the middle, between these, a brown one ; transverse channel 

 almost straight, having a black puncture on each side of the middle attached to 

 a short streak, and forming a double comma-shaped character, placed back to 

 back. Elytra : clavus pale brownish or fuscons-yellow ; nerves dark brown, 

 apex of the central nerve white, sutural nerve, from the base in to a line with the 

 apex of the scutellum, white, apex white. Corium pale brownish or fuscous- 

 yellow, the colour becoming paler as it approaches the anterior margin ; nerves 

 brown, finely granulated around the areas adjoining the anterior margin ; 1st 

 transverse nerve, and the longitudinal nerves for a short distance on either side 

 of it, white, and forming an IE shaped character ; 1st and 2ud longitudinal 

 nerves, in a line with the apex of the clavus, with a short white streak. Meni- 

 brane somewhat fuscous, nerves dark brown or blackish. Sternum yellow. 

 Legs yellow ; tibice — 3rd pair with a longitudinal dark brown or blackish 

 streak on the inside, next the inner margin ; tarsi yellow ; claws black. 



Abdomen above, black, sides broadly yellow ; posterior margin of two or three of the 

 basal segments narrowly yellow ; beneath yellow ; last genital segment black, 

 with an irregular shaped yellow blotch on the sides ; exterior processes pale 

 yellowish-white, almost straight, apex emarginate. 



9 yellow, shining, with a bronzy reflection when at rest. 



Head : croivn yellow in front, with a black spot near each eye ; between the spots, 

 and extending to the frons, is a brown patch, blackish internally, separated by a 

 narrow, yellow, central line. Face yellow, with a brown C-sliaped character, 

 extending from each eye to the centre, and surrounding the ocelli. Anteunce 

 yellow, 3rd, 4tii, and 5th Joints black, 3rd pale at the base. 



