TKTTIGIDjE. 817 



Hiud wings cinereous, pellucid, blackish along the costa ; veins black. 

 Length of the body 5£ lines; expansion of the hind wiugs 9 lines. 



It much resembles T. hastata, but is rather more slender; it is also 

 allied to T. caudata, but the prothorax is not thrice longer than the hind 

 femora. 



a. Sautarem. From Mr. Bates' collection. 



35. Tettix ruficoknis. 



Fcem. Picea, unicarinata ; caput inter antennas fulvum bicarinatum ; 

 frons tricarinata, carina intermedia furcata ; antenna ruffe, 

 gracillima ; prothorax sub tuber culatus, carinis lateralibus interruptis, 

 postice lanceolatus abdomen superans ; pedes sat robusli, tibiis 

 qualuor anterioribus fulvo trifasciatis, tibiis tarsisque posticis 

 fulvis; alee postica diaphana, vitta costali cervina, margine exleriore 

 fuscescenle. 



Female. Piceous. Head and prothorax with a slight keel. Head 

 tawny between the antenna? ; tip of the vertex not prominent ; two short 

 keels between the antenna?, and three anterior keels, of which the middle 

 one is furcate towards the face, the lateral pair are curved outward. Eyes 

 slightly prominent. Antennae red, very slender. Prothorax minutely 

 tuberculate, with two slight lateral keels, which are dislocated in the fore 

 part and converge from the base of the fore wings to the tip; transverse 

 impressed lines as usual ; hind part lanceolate, slightly compressed, 

 extending rather beyond the abdomen and the hind femora. Legs rather 

 stout; four anterior tibia? with three tawny bands; hind tibia? and hind 

 tarsi tawny. Fore wings rudimentary. Hind wings ample, pellucid, with 

 a fawn-coloured costal stripe ; exterior border festooned, tinged with brown ; 

 veins black. Length of the body 7 lines ; expansion of the hind wings 

 11 lines. 



The prothorax has no lateral appendages, and thereby this one differs 

 from all the preceding South American species of the genus. 



a. Santarem. From Mr. Bates' collection. 



36. Tettix maura. 



Mas. Nigra, sat robusta ; palpi albi, clavati ; prothorax subrugulosus, 

 margine antico acute angulato verlicem superante, carina bene deter- 

 minata, postice lanceolatus abdomen longe superans ; tarsi postice albo 

 bifasciati ; ala postica nigricantes. 



Male. Black, moderately stout. Head and prothorax with a well- 

 defined keel. Head very short, much narrower than the prothorax; the 

 keel continued to the tip of the vertex and there parted into two keels 

 between the antenna?; an anterior keel forked towards the face. Eyes 

 white, prominent. Palpi white, clavate. Antenna? very slender. Pro- 

 thorax slightly rugulose; fore border acutely angular, projecting between 

 the eyes ; two lateral keels diverging from the first transverse impressed 

 line to the base of the fore wing, converging from thence to the tip; hind 



