the Tetriginx in the Oxford University Museum. 423 



percurrent, entire, but little elevated, scarcely convex forward and 

 nearly straight on the lengthened jiosterior process ; lateral 

 carinse distinct ; process lengthily extended beyond the apices of 

 posterior femora. Anterior and middle femoral margins entire ; 

 posterior femora narrow elongate. Elytra oval ; wings caudate, the 

 first and third articles of the posterior tarsi nearly equal in length, 

 the first and second pulvilli acute, the third flat below and longer 

 than the second. 



Entire length of body, male and female, 12-13'5 mm.; pronotum 

 7'8-9'5 mm.; posterior femora 4 mm. 



One male and one female from Sarawak, Borneo, col- 

 lected by Wallace ; W. W. Saunders' collection, presented 

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



Two male examples from Banguey, Borneo (Staudinger 

 coll.), in the author's collection. 



Genus MiCRONOTUS, Hancock. 



1. M. eavdatns (Sauss.), Orthopt. nova Amer. in Rev. et 



Mag. de Zool. p. 30, 1861. 

 = Tettix caudatus, Saussure, = Paratettix caudatiis, 

 Bolivar. 



This species is common in South America and the 

 West Indies. It is subject to considerable variation 

 especially in the female, with respect to the undulation 

 of the median carina of pronotum ; just behind the 

 anterior margin it is often cristulate, then taking an undu- 

 lating course backward, it varies in the size and number 

 of undulations. Represented by nine examples in the 

 University Museum, Oxford, as follows : Three males and 

 one female from Rio de Janeiro (probably), presented by 

 J. W. Miers ; one female from Rio Grande do Sul, No. 

 1)250, presented by Malcolm Burr and identified by 

 Brunner v. Wattenwyl ; two examples from Island of St. 

 Vincent, West Indies ; one example from Brazil (D. 

 Swainson's coll.) ; one female from Trinidad, West Indies, 

 from W. W. Saunders' coll., presented by Mrs. F. W. Hope. 



2. M. duhius, sp. nov. 



Resembling hancocJci, Bruner. Body very small, having the 

 frontal costa very sliglitly sinuate between the eyes ; the median 

 carina of pronotum irregularly and minutely sinuate ; the dorsum 

 somewhat scabrous, the inferior margin of the middle femora 



