1873.] 27 



Thorax : pronotum as in the c? • Scvtellum yellow, with a broad, brown, central 

 streak, divided by a paler line, and a brown triangular spot near each basal 

 ajigle. All the other characters as in the S ■ Length, c? , 2 ; ? , 2j lines. 



A miicli smaller species tlian /. Jituratus, and at ouce distinguish- 

 able from it by tbe absence o£ the "nhite blotch in the claviis, the 

 coarse granulation, and the seeming transverse band. 



This species was submitted to the late Dr. Fieber for determina- 

 tion, who returned it with the above name, and, although described 

 by him in the Verhandlungen for 1868 as already quoted, by some 

 strange oversight it is omitted from his Catalogue. 



Three specimens (2 ^ and 1 ? ) were taken by Mr. Douglas at 

 the sallow pit, Lee, and George lane, Lewisham, in August. 



Species 4.— Idiocerus teemtjl^, Estl. 

 Cicada tremidce, Estl., Handl., p. 129, t. 5, fig. 3 (1796). 

 lassiis tremul(E, Zett., Ins. Lap., 302, 3. 

 Idiocerus unifasciatiis, Curt., B. E., 733, 6. 



„ tremulce, Flor, Ehyn. Liv., Vol. ii, 172, 6 ; Marshall, Ent. 



Mo. Mag., Yol. ii, 105, 5 ; Kirschb., Cicad., 157, 8 ; J. Sahib., 



Not. Fenn. part 12, M6, 7 (1871). 



(J and ? white. Antenncs without the apical plate ; elytra with a 

 distinct, transverse, brown baud beyond the middle. 



Head : croion more or less brown, with a pale central line. Face — base more or less 

 dark brown, divided by a pale central line, and with a white or gi'eenish-white 

 spot exterior to the ocelli ; apex pale brown. 



Thorax : pronotum white or greenish-white, with a large, somewhat ovate, dark 

 brown patch near the anterior margin, on either side of the centre ; sides, 

 within the pale margin, brown. Scutellum pale, with tliree triangular, dark 

 brown spots at the base ; or brown, with a pale spot at the base, on each side of 

 the centre. Elytra : claviis, between the inner margin and central nei-ve to a 

 little distance before the apex, bi'own ; base and apex of the inner nerve and a 

 small portion of the disc, white ; apex of the central nerve white, within which 

 and the inner margin is a triangular white patch ; between the central nerve 

 and suture, white, as far as the apex of the former. Corium white, with a clear 

 brown, transverse band extending across its entire breadth, its upper margin in 

 a line with the central nerve of the clavus, and its lower margin in a line with 

 the apex of the same ; nerves white, except in passing through tlie band, where 

 they are slightly darker in colour than the band itself. Memhrane pale fuscous ; 

 nerves dark brown. Legs yellow ; thighs — apex sometimes brownish; tibicB 

 on the inside, at the base of the inner margin, frequently dark brown ; tarsi 

 yellow ; claws black. 



Abdomen of the ^ entirely yellow ; last geiiital segment and external jirocesses 



yellow, the latter clothed with long white hairs at the apex. 

 $ brownish abofe, posterior margins of the segments darker. 



Length, <? 2 ; ? 21 lines. 



