14 JAMES A. G. REHN. 



supranal plate with a raised hastate portion which bears a central depression ; 

 cerci filiform, tapering. Color (from specimen evidently from alcohol) ochrace- 

 ous, darkest on head ; disk of wings black. 

 Measurements : 



Length of body 28.5 mm. 



Length of head 8. mm. 



Length of pronotum . . . . • 5. mm. 



Length of tegmina 33. mm. 



Length of hind femora 15.5 mm. 



Leptysina marginicollis (Seville). 



1839, Opsomala marginicollis Seville, Ortbopteres, p. 591. 



One female; Acambaro, Guanajuato, Mexico. March 30, 1899. 

 Collected by S. N. and M. C. Rhoads. 



No difference cau be detected on comparison with specimens from 

 Miami, Florida. 



Aleuas toltecus (Saussure). 



1861, A[cridiwm] toltecum Saussure, Eevue et Magasin de Zoologie, 2e ser., xiii, 

 p. 163. 



Nine specimens; four males, five females; Teocelo, Vera Cruz, 

 Mexico. Various dates in March, 1899. Collected by S. N. and 

 M. C. Rhoads (5). Motzorongo, Vera Cruz, Mexico. February, 

 1892 (U. S. N. M.) (1). Yucatan. Collected by Schott (Acad. 

 Nat. Sci. Phila.) (1). Escondido River, fifty miles from Bluefields, 

 Nacaragua. September 3, 1892. Collected by C. \V. Richmond 

 (U.S. N. M.) (2). 



This species does not fully agree with Stal's descriptions of Alexias, 

 the lower margin of the lateral lobes being sinuate (as in Paralexias) 

 and not straight. The characters of agreement are the interspace 

 between the mesosternal lobes in the female (open instead of closed), 

 and in the width of the interspace between the eyes. 



Schistocerca vaga (Scudder). 



1876, Acridimn vagum Scudder, Proc. Boston Soc. Nat. Hist,, xviii, p. 269. 



Two females; Texolo, Vera Cruz, Mexico. March 21, 1899. 

 Collected by S. N. and M. C. Rhoads. Orizaba, Vera Cruz, 

 Mexico. January 9-16, 1892 (U. S. N. M.). 



Scliistocerca pyramidal a Scudder. 



1899, Rchistocerat pyramidata Scudder, Proc. Amer. Acad. Arts and Sci., xxxiv 

 p. 454. 



Eight specimens; three males, five females; Uruapan, Michoa- 

 ean, Mexico. April 11-13, 1899. Collected by S. N. and M. C. 



