1913.] NATURAL SCIENCES OF PHILADELPHIA. 341 



Dichroplus pratensis Bruner. 



1900. Dichroplus pratensis Bruner, Sec. Rep. Merch. Locust Invest. Comm. 

 Buenos Aires, p. 74, figs. 36 and 37. [Provinces of Santa Fe and Buenos 

 Aires, Argentina.] 



Buenos Aires. February 20, 1908. One female. 



La Carlota, Province of Cordoba. Elev. 142 meters. May 7-9, 



1907. Four males. 



San Juan, Prov. of San Juan. Elev. 673 meters. January 17, 

 1909. One female. 



Mendoza, Prov. of Mendoza. Elev. 767 meters. March 31, 



1908. One female. 



San Ignacio, Prov. of Mendoza. Elev. 1,235 meters. March 

 5-22, 1908; April 5, 1908. Four females. 



The Buenos Aires and San Juan individuals are similar in 

 coloration to four specimens from Carcarana, Argentina, the San 

 Juan female being slightly smaller than the others of that sex. The 

 La Carlota, Mendoza, and San Ignacio representatives are very 

 somberly colored with little contrast in the markings, the general 

 tone varying from broccoli brown to clove brown. The La Carlota 

 specimens have the reduction in contrast more decided than in any 

 of the other individuals, while in size they average larger than the 

 Carcarana specimens. The females from San Juan and Mendoza 

 Provinces are all slightly or considerably smaller than Carcarana or 

 Buenos Aires individuals of the same sex. 



The localities in Mendoza and San Juan here given constitute the 

 western limit of the range of the species. 



Dichroplus elongatus Giglio-Tos. 



1894. D[ichroplus] elongatus Giglio-Tos, Boll. Mus. Zool. Anat. Comp., 

 Torino, IX, No. 184, p. 23. [San Pablo, Province of Tucuman, Argentina; 

 Villa Rica and Asuncion, Paraguay.] 



San Juan, Prov. of San Juan. Elev. 673 meters. January 12-22, 



1909. Twenty males, nine females. 



Caucete, Prov. of San Juan. Elev. 567 meters. January 13 and 

 17, 1909. Eighteen males, ten females, one immature female. 



La Paz, Prov. of Mendoza. Elev. 504 meters. December 19, 

 1909. One male. 



Pedregal, Prov. of Mendoza.. Elev. 696 meters. November 20, 

 1906; December 12, 1906. Two males. 



Mendoza, Prov. of Mendoza. Elev. 767 meters. January 3, 

 March 14 and 31, April 24, May 7, 11, and 31, June 5, December 3, 

 5, and 12, 1908. Eleven males, eleven females. 



Chacras de Coria, Prov. of Mendoza. Elev. 936 meters. Feb- 



