1877] 131 



be able to decide tbe question concerning Tinicephalus ohsohtus and 

 Ortholyfus Saundersi. Is it possible that tlie latter (" tbe ^ witbout 

 bamus ") is a bybrid form of tbe true Tinicephnlus ohsoletm and some 

 species of OrtJwfylus (as adenocarpi or concolor) ? Last summer I 

 found tbese species living togetber in great quantities on Sarotliamnus 

 and Ulex in Scotland (Pertb, Ediuburgb, Forres). 



Synopsis of tbe last mentioned species : — 



1 (2.) Species greenish-grey, membrane, with the cells and a ] -shaped mark 



below the apex of the cuncus darker O. Saundersi, Reut. 



2 (1.) Species green. 



3 (4.) Head very wide, nearly as wide as the base of the thorax... 



O. BICOLOR, D. and S. {chloropterus, D. and S.,and Saund.). 



4 (3.) Head not nearly as wide as the base of the thorax. 



5 (8.) Third and fourth joints of antennae together longer than the second ; 



third joint almost as long as the second. 



6 (7.) Rostrum thick, not reaclung to the apex of mesosternura. Colour bright, 



darker green. Cell-nerve grey. Spinose hairs of tibia3 black... 



O. CULOROPTERtrs, Kii'sclib. ( $ virescens, D. and S., concolor, 



D. and S., pars, Saund.). 



7 (6.) Rostrum not thick, reaching to the intermediate coxae. Colour paler 



green. Cell-nerve yellow... 



O. CONCOLOE, Kirschb. {concolor, D. and S., pars). 



8 (5.) Third and fourth joints of antennae together not so long as the second. 



Third joint of antennae about half as long as the second. Cell-nerves 

 yellow O. ADENOCAEPi, Perr. {Bouglasi, Saund.). 



Tytthus ixsignis (Cat., 83, 1). Under tbis species is cited as 

 Bynonymous : TyWius Jiaveolus, Eeut. ; but in tbe Ent. Mo. Mag., 

 xiii, p. 113, Mr. Saunders says: ''^ Chlamydatus pygmceiis = Tytthus 

 insiynis, Doug, and Scott," and in bis letter to me : " I bave a specimen 

 oi Jiaveolus, very distinct." I bave also, in Finland, found specimens 

 of Ghlamydatus pyymcBus, Zett., baving tbe pronotum nearly entirely 

 flavous (var. h. in "Rev. crit. Caps.," p. 128), and tbese specimens, 

 wbicb could not be mistaken iov Jiaveolus, accord very vrell witb tbe 

 description of Tytthus insiynis, Doug, and Scott. In my " Eev. crit. 

 Capsin.," p. 126, I bave, on tbe autbority of Messrs. Douglas and 

 Scott, described Chlamydatus Jiaveolus, under tbe name of insiynis, 

 wbicb must be cbangcd to tbe former. 



{To he continued.) 



