126 Annals of the Carnegie Museum, 



bb. Dorsum of the pronotum more or less strongly granulose or rugose and pro- 

 vided on either side of the disk with one or more well-defined supplementary 

 carinae. 

 c. Tegmina maculate (North American). 



d. Disk of the pronotum smoothly granulated, the sides provided with weak 

 but well-defined supplemental carina?. Vertex but little advanced 



in front of the eyes (New York) acuta Morse. 



dd. Disk of the pronotum coarsely and distinctly rugulose. 



e. Vertex considerably advanced in front of the eyes as in T. prorsa 

 Scudder, rather wide. Pronotum granulose between the shoulders 



(Florida and Louisiana) apicidata Morse. 



ee. Vertex but little advanced in front of the eyes. The pronotum strongly 



rugose throughout. 



/. Pronotum and wings complete, surpassing the tips of the hind femora 



(southeastern U. S. east of the Mississippi). . . .armata Morse. 



ff. Pronotum and wings abbreviated, the former not quite reaching the 



tips of the hind femora (same locality as preceding). 



armata depressa Morse. 

 cc. Tegmina immaculate [South America]. 



d. Pronotal process always lengthily subulate, the wings fully developed. 



e. Disk of the pronotum quite strongly longitudinally rugose as well as 



provided with supplemental longitudinal carinse. Upper end of 



the frontal carina prominent, the median sulcus of the top of the 



head profound (Corumba, Brazil) hancocki sp. nov. 



ee. Disk of the pronotum coarsely granulose, the supplemental carinae 



variable. Upper end of the frontal carina inconspicuous, the 



median sulcus of the top of the head only moderately excavated. 



/. Supplemental longitudinal dorsal carinae not very marked, the general 



form of the insects quite similar in appearance to T. lateralis, 



g. Median carina of pronotum not at all arched in adv^ance of the 



humeri; the frontal costa sulcate but little above the lateral 



ocelli (Chapada, Brazil) austraUs sp. nov. 



gg. Median carina of the pronotum arched in advance of the humeri, 

 the frontal costa sulcate almost to its summit (Chapada). 



intermedia sp. nov. 

 jf. Supplemental carinae of the pronotum very marked. General form 



of insect rather slender (Chapada, Brazil) costalis sp. nov. 



dd. Pronotal process nearly always much abbreviated, not extending beyond 

 the apex of the hind femora; wings seldom complete. 

 e. Dorsum of the pronotum only gently rounded, never tectate, the median 



carina straight (Chapada, Brazil) subaptera sp. nov. 



ee. Dorsum of pronotum more or less strongly tectate, the median carina 

 prominent and arcuate. 

 /. Median carina of the pronotum very prominent and strongly arcu- 

 ate, the dorsum strongly tectate. Wings sometimes complete 



(Chapada, Brazil) arcuata sp. nov, 



jf. Median carina of the pronotum less prominent and arcuate. Winga 

 always abbreviated. 



