the Tctriginm in the Oxford Univeo^sity Museum. 407 



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

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



Genus Ckyptotettix, Hancock. 



1. C. spinilobus Hanc, Occas. Memoirs Chicago Ent. 

 Society I, No. 1, pp. 14-15, Pi. I, fig. Q-Qh, 1900. 



One female example, No. 942(5, without a locality label ; 

 presented by Malcolm Burr to the University Museum, 

 Oxford. 



This species inhabits Madagascar. 



Genus Thoradonta, nov. 

 Related to Mazarredia. Body scabrous, occiput covered by pro- 

 notum to tbe eyes, head not exserted ; stature small, yet somewhat 

 stout. Vertex distinctly wider than one of the eyes, not advanced 

 beyond the eyes, scarcely at all narrowed -forward, somewhat imper- 

 fectly carinate in front but bearing little abbreviated carinulse on 

 each side, median carina little distinct forward and little produced, on 

 each side subfossulate, frontal costa moderately sulcate, the rami 

 evenly divergent, branching little behind the posterior ocelli near 

 the vertex, posterior ocelli placed between the middle or 

 barely below the middle of the eyes ; maxillary palpi having 

 the apical articles little compressed, often white ; antennte somewhat 

 elongate, inserted below tlie eyes. Pronotum scabrous, deplanate on 

 the dorsum, anteriorly truncate, posteriorly acute but not spinate, 

 not extended backward to apices of hind femora or little beyond ; 

 median carina strongly compresso-sinuate ; dorsum between the 

 carinated humeral angles little dilated and bearing a supernumerary 

 abbreviated carinula on each side ; lateral carinas behind the 

 shoulders often little compressed and elevated above the elytra. 

 Elytra oval; wings abbreviated or nearly perfectly explicate. Lat- 

 eral lobes of pronotum having the posterior angles distinctly laminate 

 expanded and produced in a spine or acute dentate, subtruncate 

 behind. Anterior femora above carinate, below subundulate ; middle 

 femoral margins above undulate, below undulate-sublobate ; pos- 

 terior femoral margins arcuate above and below, entire or minutely 

 serrulate, the pra^genicular and genicular lobes small, posterior 

 tibia) somewhat dilated towards the apices, margins spinose ; the 

 tirst and third articles of the posterior tarsi subequal in length. 



Type T. denkda, described herewith. 



