10 



This i^eculiar locust has been taken at San Pedro, Par- 

 aguay (Giglio-Tos) and is liable to occur in the Chaco 

 country. 



3f(/si/n.fe-s tigris Burr, Essai sur les Eumastacides, p. 62. 



Like the preceding species this is a Paraguayan locust to 

 be looked for in the territories of Formosa and Chaco. 



SUB-FAMILY PROSCOPINAE. 



As indicated in the table for determining the sub-families 

 of locusts it will be seen that the insects belonging to this 

 sub-family are rather long, wingless, and resemble to a cer- 

 tain extent the different species of walking sticks, or stick 

 insects. Thus far there have been reported from Argentina 

 thirteen distinct species. They belong to the two genera 

 that may be separated by the accompanying table. 



TABLE OF GENERA. 



A. Pronotum cylindrical, not separated from the prosteruum by longitu- 

 dinal lines. Body comparatively heavy in the female: antenna^ 

 nearly as long or a tritle longer than the vertex. 



TI:TAN<)HHYXCHI S Bmnner. 

 AA. Pronotum more or less flattened from a))ove. divided from the pro- 

 sternum by a longitudinal line. Bcjdy long and slemler even in 

 the female; the vertex in both sexes advanced beyond the tip of 

 the antennae. CKPHALOCOEMA Serville. 



GENUS TETANORHYNGHUS, BRUNNER. 



TABLE FOR THE SEPARATION OF THE SPECIES. 



A. Rostrum of the female distinctlj^ shorter than the remainder of head, 



attenuated towards the apex. liumiHs Giglio-Tos. 



AA. Rostrum of the female distinctly longer than the remainder of head. 



b. Rostrum with the apex sti'ongly clavate, posterior tibi.-v armed 



above with 14-22 spines on the inner and outer rows. 



Borellii Giglis-Tos. 

 bl). Rostrum attenuate towards the apex. Posterior tibia' armed above 

 with 13 spines on the inner and outer rows. 



aiigustirostris Brunner. 



T. /lumilis Giglio-Tos. San Lorenzo, Province of Jujuy 

 and northward. (Giglio-Tos.) 



T. Borellii Giglio-Tos. Same localities as the xn-eceding, 

 and likewise Bolivia. (Giglio-Tos. ) 



7'. (ntf/ustiro-'^tris Brunner. San Jose, Republic of Argen- 

 tina. (Brunner.) 



