272 PROCEEDINGS OF THE ACADEMY OF [Apr., 



veins straw colored, although the coloration of the pronotal disk 

 and of the limbs is normal. The Alto Pencosa and Florincia speci- 

 mens have the region of the costal veins of the tegmina almost as 

 yellowish as the pronotal margin. The range of the species is 

 extended considerably westward by the Alto Pencosa record. 



Ischnoptera rufa Brunner. 



Misiones. December 8, 1909. (Jorgensen.) One male. 



Ischnoptera vilis Saussure. 



Buenos Aires. (Lizer.) One male. 



La Cumbre, Prov. of Cordoba. (Lizer.) One male, one female. 



Misiones. January, 191 L (Jorgensen.) One male. 



The above males have been compared with Paraguayan specimens 

 of the same sex. The Buenos Aires individual has the interocular 

 portion of the occiput quite rufescent, a condition not found in any 

 of the other specimens examined. The female, which sex was 

 previously unknown, has abbreviate lateral non-attingent sublanceo- 

 late tegmina, much as in the North American /. johnsoni, from which 

 it can be readily separated by the slenderer build, relatively larger 

 and broader head, more transverse pronotum, more tapering tegmina 

 and shorter, more robust cerci. The measurements of the female 

 are as follows: length of body, 14.8 mm.; length of pronotum, 4.2; 

 greatest width of pronotum, 5.5; length of tegmen, 3.6. 



The only previous record of the species from Argentina is that 

 from Corrientes by Saussure. 



Ischnoptera marginata Brunner.'' 



Misiones. January, 1911, December, 1910, December 1 and 20, 

 1910. (Jorgensen.) Two males, four females. 



Ischnoptera brasiliensis Brunner. 



Misiones. January 5 and 29, 1910, December, 1909. (Jorgen- 

 sen.) Three males. 



La Cumbre, Prov. of Cordoba. (Lizer.) Two males. 



Mendoza, Prov. of Mendoza. (A. C. J. Haarup.) 1904-1905, 

 November 20, 1906. Two males. 



The La Cumbre and Mendoza records are the most southern for 

 the species. 



*Very probably Blatta fusca Saussure (Revue et Magasin de Zoologie, (2), 

 XXI, p. 110 (1869) — •'■ Ager Argentinus, " later given with exactness as Corrientes) 

 is a synonym of this species. Shelford places it in Blattella, but the description 

 and measurements agree very completely with Brunner's marginata, which has 

 four years' priority. 



