(')5() rnocEEDiNds of the national museum. 



For a discussion of the synonomy the reader is referred to Scudder's 

 paper on "A study of the giant lobe-crested grasshoppers of South 

 and Central America." 



Another species of the genus, T. cridat<i^ is common along the 

 northwestern borders of Argentina and northward. It is barely pos- 

 sil)le that it also reaches the mountainous portions of Paraguay. 



DIPONTHUS Stal. 

 " . TABLE FOR DETERMINATION OF SPECIES. 



/. Tiiberrle of the j)rosternum acuniinate, retro-arcuate. 

 /'. (ieneral color green or olive; tegiiiina immaculate, the margins pale. 

 c. (trass-green; the tegmina grass-green; wings greenish hyaline. Posterior 

 femora on outer face not transversely banded; the tibi;c green, not dotted 



with black electns Serville 



cc. Olive-green; tegmina dilute fuscous; wings subhyallne, rose-color basally, the 

 nervures brown. Posterior femora on the outer face with two bands and 

 the condyle black or blackish; hind tibife with base, apex, and spines 



1 )lack diKpar Gerstaecker 



bb. General color ochraceous or fuscous; tegmina maculate. 



c. Wings blue, the apex bordered with brown; hind til)ia' black and yellow 



annulate, not black-dotted .festivus Gerstaecker 



cr. Wings rose color, tesselate with lilack; hind tibia* yellow, dotted with black, 



apex and base duskj^ darazianus Pictet and Saussure 



art. Tu1)er('le of the prosternum straight, not retroarcuate. 



b. Pronotum with the pale lines percurrent, three dorsal, straight; two lateral, 

 suboblique. P)ody and legs yellow, black, and red; tegmina black tesselate 



with yellow j)itrlclni.^ Pictet and Saussure 



hh. Pronotum with the pale lines not jiercurrent, except the dorsal one alone in 

 some instances. 

 c. Larger (male, 40, female, 51 nnn.). Testaceous ccmspersed with black. 



nif/rn-conspersus Stal 

 cc. Smaller (male, 24-29, female 30-40 mm.). Color variable. 

 (1. Body and legs not black s]H)tted. 



c. Tegmina for the most part olivaceous or greenish, but slightly maculate 



with dusky pcnimtus Serville 



ce. Tegmina decidedly obscure maculate. 

 /. Anterior and middle legs not largely black; general color dull testaceous, 



inclining to brown paragnai/ensi.'<, new species 



ff. Anterior and middle legs largely black. 



f/. Pronotum largely black, the bands bright yellow, head and knees 



ornamented with red xchulzi Bruner 



f-/;/. Pronotum when black only so on the anterior lobe, the bands testa- 

 ceous. Head and knees withoutred. .argtmtixits Pictetand Saussure 

 dd. Body and legs conspicuously conspersed with black. 



('. Body and legs strongly tinged with rufous or red. Antemiie unicolorous, 



black pycDosI ictus Pictet and Saussure 



ee. Body and legs along with tegmina greenish or olivaceous. Antenna' 

 annulate with pale communis Bruner 



