the TetriginiG in the Oxford University ^hiseum. 419 



far as the author's experience goes, does not inhabit South 

 America, but is confined to Mexico and South-Western 

 United States. E. fossulatus is distinguished from P. 

 toltecus by the broader vertex, the rugose-tuberculate pro- 

 notum, and the minute elytra, which are sometimes 

 partially hidden by the inferior lateral margin of the 

 pronotum. 



2. H. lobulatus (Stal), Freg. Eug. Res. Ins. Orthopt., p. 

 347, 1860 = Tetrix lobulata (Stal) and Faratettix 

 lohulattts (Stal), Bolivar, and Faratettix horellii, Giglio- 

 Tos. See ante. 



One male example collected by Bates on the Amazon, 

 South America ; W. W. Saunders' collection, presented by 

 Mrs. F. W. Hope to the University Museum, Oxford. 



Genus Tettiella, nov. 



Eesembling Protntettix, Bolivar, but having the stature small, the 

 eyes very small ; the vertex wide, little narrowed forward, more or 

 less advanced beyond the eyes, anteriorly the transverse carinulte 

 roundly flexed backward on each side, sulcate on each side of median 

 carina, fossulate forward but mammiilate posteriorly on each side of 

 occiput. Pronotum anteriorly angulate produced over the head, 

 between the shoulders often tumid, the humeral angles wanting or 

 obsolete, posteriorly the process abbreviated, the apex obtuse or 

 emarginate, not extended backward to apices of the posterior femora, 

 the posterior angles of lateral lobes turned down but more or less 

 obliquely excised or subrounded. Elytra and wings wanting. First 

 articles of posterior tarsi much longer than the third. 



The type is T. areuata described herewith. To this 

 genus also belongs : Tettix dithiosus, BoL, Tettix latipes 

 (Stal), and Tettiella conofrons, Hancock, described further 

 on. 



1. T. areuata, sp. nov. 



Body small, somewhat tumid, strongly rugose-tuberculate, con- 

 spersed with pale granulations, colour pale variegated with fuscous, 

 disc of pronotum having a pale tumose excrescence. Vertex wide, 

 equal to twice the width of one of the eyes, narrowed forward, the 

 front margin little advanced beyond the eyes, convex, sulcate on each 

 side of the median carina, fossulate forward and mammiilate pos- 

 teriorly on each side of the occiput, in profile the vertex little elevated 



TRANS. ENT. SOC, LOND. 1908. — PAET III. (DEC.) 28 



