JAMES A. G. REHN 275 



A feature found in all the specimens, but less marked in the 

 adult female than in the others, is the presence of a blackish 

 annular section proximad on the cephalic and median femora. 



ACRiDiNAE (Truxalinae of authors) 

 Truxalis brevicornis (Johannson) 



1764. Gryllus brevicornis Johannson, Amoen, Acad., vi, p. 398. [Pennsyl- 

 vania. ^5] 



Para, Para. (C. F. Baker.) One male. 

 This specimen is in the green phase. 



Paratruxalis filatus (Walker) {Orphula pagana of authors, but not of StS.1.) 

 1870. Chrysochraon filatus Walker, Catal. Derm. Salt. Brit. Mus., iv., p- 

 785. [Santarem, Brazil.] 



Para, Para. (C. F. Baker.) One male, two females. 



These specimens agree with Walker's description and are in- 

 separable from Argentine and Paraguayan specimens. They 

 do not approach P. f. minor (Giglio-Tos) of the more elevated 

 regions of central-southern Bolivia and northwestern Argentina. 

 The typical form is now known to range from Resistencia, Chaco 

 and Misiones, Argentina northward over the central riverine 

 areas to the Amazon valley, being absent, as far as known, from 

 the eastern more elevated and coastal regions. 



By an unfortunate misidentification, which has been uni- 

 versally followed, Giglio-Tos considered a member of the group 

 Hyalopteryges to represent Stal's Gomphocerus paganus,^^ 

 described from Rio de Janeiro. The genus Orphula was erected 

 by Stal subsequent to his specific description, to contain paganus 

 and another species, to the former of which Giglio-Tos, in the 

 paper here referred to, restricts it by his comment, "Species 

 typica: 0. pagana Staol." As a matter of fact Giglio-Tos was 

 completely in error in his association of material, but his mistake 

 is quite pardonable, as until the present time, as far as our knowl- 

 edge goes, no topotypes of Stal's species have been examined. 



We have recently had an opportunity to study such material, 

 which we will report upon elsewhere, and we can say with au- 

 thority what Stal's species really is, our scries fully agreeing with 

 his rather rambling description. We also have before us a suffi- 



ssproc. Acad. Nat. Sci. Phila., 1913. p. 313, (1913). 



3« Boll. Mus. Zool. Anat. Comp. Torino, ix, no. 184, p. 9, (1894). 



TR.4.NS. AM. ENT. SOC, XLII. 



