July, 1873.] 25 



Species 2. — Idiocerus litueatus, Fall. 



lassns Uturatiis, Fall., Hem. Suec. Cicad., 60, 2. 



Bythoscopus lituratus, H.-Scli., D. I., 143, 13. 



Idiocerus macuUpennis, Curt., B. E., pi. 733 (text). No. 3. 



Bythoscopus lineolatus and dorsiger, Lep. et Serv., Enc. Metb., Vol. x. 



Idiocerus lituratus, Marshall, Ent. Mo. Mag., Vol. ii, 103, 2 ; Kirschb., 



Cicad., 154, 5 ; J. Sahib., Not. Fenn., part 12, 141, 1. 

 Idiocerus Herrichii, Kirschb., Cicad., 152, 1. 



(^ and $ pale yellowish or yellowish-brown ; co?'iiim — anterior 

 margin not flattened in the middle, and without nodules. 



Head ; croton more or less clear yellow or greenish-grey, in front with a round black 

 spot near to each eye. Face yellow, pale testaceous or somewhat greenish-grey, 

 next the clypeus not unfrequently orange-yellow. AnteiincB yellow ; apical 

 plate black. 



Thorax : pronotum yellowish or pale luteous, more or less clouded with fuscous ; 

 next the anterior margin are two or three irregular shaped black spots on each 

 side of the centre. Scutelluni similar in colour and markings to I. popiili ; the 

 markings very variable. Elytra : clavus pale yellowish-brown, inner margin 

 narrowly black ; nerves browai, with minute granules along the sides, central 

 nerve at the apex white, the colour extending for a little distance on to the 

 disc, and forming a distinct oval patch. Corium pale yellowish-brown, anterior 

 margin next the base more or less orange-yellow, in the middle with a black 

 streak on the inside ; nerves brown, sometimes almost black, thickly granulated, 

 1st inner longitudinal nerve with two short, white streaks, one immediately 

 beyond the 1st transverse nerve, the other in a line with the apex of the clavus ; 

 2nd longitudinal nerve, opposite to the last, also with a white streak. Mem- 

 brane — nerves black ; base of the membrane appendix with a short, longitudinal 

 piceous streak. Legs yellow, sometimes with a brownish shade ; thighs — 1st 

 pair with a black spot on the upper side, near the apex ; 2nd and 3rd with a 

 short, black, longitudinal streak on the inside, near the apex ; tihice — on the 

 outer margin witli a short, black streak at the base, frequently continued to the 

 apex ; 2nd and 3rd pairs more or less black on the inside, next the inner mar- 

 gin ; spines on the 3rd pair pale ; tarsi yellowish or brownish, apex of the 3rd 

 joint, sometimes the 2nd, darker ; claws black. 



Abdomen above, black, posterior margin of the segments on the sides naiTowly clear 

 yellow ; beneath yellow ; last genital segment black, exterior processes similar 

 to those of /. adustus. 



The $ difPers only in having the nerves of the elytra of a clear brown colour. 



Length, 2^— 2| lin. 



When in repose, the insect appears to have an interrupted, 

 irregular, transverse band below the apex of the clavus, partly 

 caused by the abdomen shining through the elytra, and partly by the 



