Bruner: South American Crickets. 357 



collected by H. H. Smith. Other specimens also were taken at the 

 same place. In addition to these there are some other specimens at 

 hand coming from Corumba, May, and Piedro Blanco, April (H. H. 

 Smith), while a single specimen bears the label "Puerto Suarez, 

 Bolivia, 150 M. Nov. '08-Jan. 'eg. (J. Steinbach)." 



10. Tridactylus australis sp. nov. 



About the same in size as the preceding, but differing from it in 

 having the body glabrous and nearly impunctate, even on both the 

 pronotum and the front between the eyes. General color smoky- 

 white or pale flavous, with the sides of the pronotum, base of the 

 tegmina, and outer face of the hind femora showing traces of clouded 

 jiatches. Pronotum near its anterior part showing plainly the trans- 

 verse impressed line mentioned in the synoptic table of genera. 

 Apex of the clypeus broadly and roundly, or arcuately, emarginate. 

 Last ventral segment of the abdomen of the female scoop-shaped, the 

 apex rounded, entire; the preceding segment with its apex gently 

 bilobed, a little more than twice as wide as long; in the male the 

 apical segment, or subgenital plate, has the apex somewhat emar- 

 ginate, and the preceding segment nearly, or quite, entire. 



Length of body, cf, 6.5 mm., 9 , 7.5 mm.; to tip of wings, c?', 8 

 mm., 9 , 9-5 mm. 



Habitat. — The types, c?' & 9 in coitu, come from Formosa, Chaco, 

 Argentina, where they were taken by the writer in September, 1897. 

 Other specimens are at hand from the same place, and still others 

 come from Carcarana and Cruz del Eje, Argentina, and San Bernadina, 

 Paraguay. The Carnegie collection contains a specimen from the 

 "Province del Sara, Bolivia, 450 M. (J. Steinbach)." 



II. Tridactylus atratus sp. nov. 



At first glance suggesting a diminutive of the T. ohscurus, described 

 in this paper, but upon examination found to be without the dull 

 surface and puncturation so characteristic of that species. 



Moderately robust, the front evenly rounded and provided with a 

 few rather large punctures, the clypeus short, transverse, its apex 

 truncate. Pronotum evenly rounded, without a very definite trans- 

 verse impressed line in advance of the middle, the surface shining, 

 provided with a few scattered punctures. Hind femora robust. 

 Hind tibiae provided with natatory appendages and the carinae with 



