132 Annals of the Carnegie Museum. 



General color wood-brown, irregularly marmorate with brunneo- 

 testaceous; hind femora pallid externally, the upper margin irregu- 

 larh flecked with brown, which shows a tendency to form two traces 

 of transverse bars, discal borders alternately flavous and brunneous, 

 the genicular lunules in nowise darkened; lower sulcus and internal 

 face bright blood-red; hind tibia? brunneous with a faint vinaceous 

 tinge; the anterior and middle legs somewhat conspersed with brown. 

 Antennae pale ferruginous. 



Length of body, cf , 16.5 mm., of pronotum, 3.5 mm., of tegmina, 

 14 mm., of hind femora, 10 mm. 



Habitat. — Chapada, near Cuyaba, Matto Grosso, Brazil, repre- 

 sented by a single male, the type, which was taken in April by H. H. 

 Smith. Collection of the Carnegie Museum. 



The wide vertex and scarcely sulcate fastigium of this insect are 

 similar to these characters as found in the different species of Leiotettix, 

 but other characters, as the form of the pronotum, etc., tend to place 

 it with the species of Dichroplus instead. The nine spines in the 

 outer row of the hind tibise and a faint longitudinal dark line on the 

 hind coxae w T ould associate the present species with fuscus Thunberg 

 and exilis Giglio-Tos, with closer relationship to the latter. 



182. Dichroplus arrogans (Stal). 



Acridiiim {Podisma) arrogans Stal, Eugenies Resa, Orthopt., p. 333 (i860). 

 Pezotettix {Dichroplus) arrogans Stal, Recens. Orthopt., I, p. 78 (1873). 

 Pezottix arrogens Stal, Bihang. Svensk. Akad. Handl., V, no. 9, p. 6 (1878). 

 Dichroplus arrogans Bruner, 2d Rept. Locust Com. B. Aires, pp. 72, 75, 76, figs. 36 

 42 (1900). 



Habitat. — This species is confined to Uruguay and middle Argentina. 

 A specimen is at hand from Montevideo, where it was taken during 

 December by H. H. Smith. 



Dichroplus arrogans has a very similar appearance to that of the 

 North American Melanoplus atlantis Riley and some of its near allies. 



183. Dichroplus punctulatus (Thunberg). 



Gryllus punctulatus Thunberg, Mem. Acad. Petersb., IX, p. 408 (1824). 

 Pezotettix (Trigonophymus) punctulatus Stal, Recens. Orthopt., I, p. 77 (1873). 

 Pezotettix (Dichroplus) punctulatus Stal, Obs. Orthopt., Ill, p. 6 (1878). 

 Dichroplus punctulatus Giglio-Tos, Boll. Mus. Zool. Anat. Torino, IX, no, 184, 



p. 21 (1894). 

 Acridium (Podisma) fraternum Stal, Eugenies Resa, Orthopt., p. 333 (i860). 

 Cyrtacanthacris munda Walker, Cat. Dermapt. Salt. Brit. Mus., IV, p. 612 (1870). 



