OTES ON SOUTH AMERICAN GRASSHOPPERS OF TRF 

 SUBFAMILY ACRIDIN.E (ACRIDID^) WITH DESC^^^^^ 

 TIONS OF NEW GENERA AND SPECIES ^ESCRIP- 



By James A. G. Rehn, 



Of the Academy of Nalnral Sciences nf Phlhidelphia. 

 _ The following- records and descriptions are based on a portion of a 



I wish to thank the officials of the U. S. National Museum for the 

 privilege of examining this very interesting and valuable series. 



AMBLYTROPIDIA Stal. 

 AMBLYTROPIDIA CHAPADENSIS, new species. 



bei. (H. H. Smith.) [Cat. No. 9481, U.S.N.M.] 

 Belonging- to the group containing^, trimtatls and elongata Bruner 



nd ....,,,,, McNeill From ^ongc,. it can readily be separated by 

 the heavier form, broader fastigium, more robust caudal limbs and 

 weaker carination. From trl^viioM, it can be distinguished bv the 

 ^enderer head, with much less prominent eyes and tie shorter and 

 moie lobust caudal femora. From aurhe,^ns it can be separated bv 

 the same characters that distinguish it from trmltatk, and in colora- 



lon It appears to be about intermediate between the two. Its closest 

 lelationship seems to be with axirlve^itris, the head of that species 

 being more coinpressed, and in that respect closer to chapadensk. The 

 width of the^ head and prominence of the eyes form a good index to 

 he relationship of the species of this small group of the genus, elongata 

 rep.esenting- one extreme and trmUaiis the other, chapadensis and 

 «m.m^r.6- being interpolated between the two in the order named 



Size medium (for the genus); form moderately elongate; surface 

 ruguioso-punctate except the pronotum which is cribriform punctate. 



~ r~ ^ 



« Proc. Acad. Nat. Sci. Phila., 1906. 



i 



Proceedings U. S. National Museum, Vol. XXX-No. 1453 



371 



