?,-^ 



the species that winters over as adults. Cordoba (F. Schulz, 

 H. Stempehnann); Carcarana. (O. Thomas.) 

 \ 



Fig. 8. — Sinipta Daluiani, female, and top of head and pronotuin. 



GENUS AMBLYTROPIDIA, STAL. 



A. ferruf/ino.sd Stal. This locust occurs in small numbers 

 from Buenos Aires northward. Specimens are contained in 

 the collections of F. Schulz, H. Stempehnann and O. 

 Thomas. It was also reported by Gigiio-Tos. 



GENUS DICHROATETTIX, N. G. 



Specimens of a rather small bat comparatively robust lo- 

 cust related to the genus Steiiobof/n-ns were found in consid- 

 erable numbers over portions of the provinces of Santa Fe 

 and Cordoba. These apparently belong to an undescribed 

 genus which might be characterized as follows : 



Fastigium of the vertex rather broad with the margins 

 slightly raised ; the lateral foveolae only faintly indicated, 

 linear and visible from above ; the vertex above with a per- 

 current longitudinal carina. Antennae with the joints flat- 

 tened, slightly constricted in the middle, expanded at the 

 base and towards the apex, in the female about as long as 

 head and pronotum combined, in the male half as long again, 

 in the latter curled toward apex. Frontal costa rather broad, 

 not very prominent and gently sulcate from the antennae to 

 clypeus. Pronotum with the front edge straight ; the lateral 

 carinae converging towards the middle, the hind edge a 

 right angle or more, transverse groove about the middle. 

 Tegmina complete, nearly or quite reaching the tip of the 

 hind femora ; costal area of wings in male somewhat broad- 

 ened indicating that the insect might be a noisy one. Hind 

 wings with basal portion red, apex infuscated, the males 

 dusky, females greenish. 



