344 PROCEEDINGS OF THE ACADEMY OF [May, 



Dichroplus conspersus Bruner. 



1900. Dichroplus conspersus Bruner, Sec. Rep. Merch. Locust Invest. 

 Comm. Buenos Aires, p. 76, fig. 41. [Southern Santa Fe and eastern 

 Cordoba Provinces, Argentina.] 



Buenos Aires. May 3, 1907. One female. 



This specimen has been compared with Carcarana individuals 

 received from Bruner. The localities given above are all known for 

 the species. 



* Dichroplus dubius Bruner. 



1906. Dichroplus dubius Bruner, Proc. U. S. Nat. Mus., XXX, p. 682. 

 [Sapucay, Paraguay.] 



Misiones. January 3-14, 1910; December 12, 1910. (No. 9.) 

 Two males, two females. 



These individuals are found to be inseparable from topotypes. 

 The Misiones and Sapucay, Paraguay, are the only localities known 

 for the species. 



Dichroplus vittatus Bruner. 



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

 Buenos Aires, p. 77, figs. 43 and 44. [Provinces of Santa Fe, Cordoba, 

 San Luis ("Louis") and Mendoza ("Mendosa"), Argentina.] 



San Juan, Prov. of San Juan. Elev. 673 meters. January 16-17, 

 1909. Three males, two females. 



Caucete, Prov, of San Juan. Elev. 567 meters. January 11, 

 1909. One female. 



Mendoza, Prov. of Mendoza. Elev. 767 meters. March 20, 

 April 24, May 1-31, June 12, 1908. Twelve males, four females. 



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

 ruary 9, April 5 and 7, 1907. One male, two females. 



San Ignacio, Prov. of Mendoza. Elev. 1,235 meters. March 23, 

 April 5, 1908. Three males, one female. 



Cordillera de Mendoza. March 20, 1908. One male, one female. 



We have before us, in addition to the above series, two pairs of 

 typical material from Rosario, received from Bruner. It is evident 

 that the insect varies greatly in size, wholly individually so it appears. 

 The Mendoza series alone contains specimens of both sexes showing 

 this very clearly, the extremes of both sexes measuring as follows: 

 length of body, d" 14.3-17.5 mm., 9 20-24.2; length of pronotum, 

 d" 3.3-4, 9 4.2-6; length of tegmen, cT 5.2-6.8, 9 7-9.2; length of 

 caudal femur, cf 8.6-9.5, 9 11-13. All of the individuals in the 

 present series are brachypterous. 



In color the variation is considerable, but apparently this is almost 

 wholly geographic. The series from Mendoza Province have a more 



