286 PROCEEDINGS OF THE ACADEMY OF [May, 



Fe7nale. 



a. — Lateral margins of the pronotum regularly and finely denticulate. 

 Tegmina with the discoidal and anal fields unicolorous. 



(Form robust.) argentina (Burmeister). 



aa. — Lateral margins of the pronotum strongly spinose, the spines 

 with regularly intercalated spinulations. Tegmina with the 

 discoidal and anal fields bicolored. 

 b. — Size medium to large. Pronotum with the length of the 

 collar contained over twice in that of the shaft, 

 c. — Size large (body 62-80 mm.; pronotum 19-25.3). 



d. — Pronotum broader, the greatest width contained about 

 three times in the length, shaft weakly carinate. 



Cephalic limbs more robust daraziana Saussure. 



dd. — Pronotum more elongate, the greatest width contained 

 about four times in the length, shaft decidedly 

 though finely carinate. Cephalic limbs slenderer, 



thoracica n. sp. 

 cc. — Size medium (body 44-54 mm.; pronotum 13.2-15.8), 



gayi (Blanchard). 



bb. — Size small. Pronotum with the length contained not more 



than twice in that of the shaft constricta n. sp. 



Coptopteryx argentina (Burmeister) .5 



1864. M[antis\ arQenlina Burmeister, Berl. Entom. Zeitschr., VIII, p. 208. 

 [Argentina between Buenos Aires and Mendoza.] 



Misiones. January 18, 1910. (No. 1.) One male, 



Mendoza, Prov. of Mendoza. Elev. 767 meters. May 2, 1908. 

 One female. 



Chacras de Coria, Prov. of Mendoza. Elev. 936 meters. January 

 20, 1908; March 9, 1908; April 5 and 11, 1907. Four females. 



Cordillera de Mendoza. March 22, 1908. One male. 



Of this species we have before us a series of eleven males and 

 fifteen females, from the evidence of which we know there is a great 

 amount of individual variation in size. The two males from Sapucay 

 previously recorded by us as crenaticollis (vide infra) are considerably 

 smaller than any other specimens of that sex, although the largest 

 male individual is from the same locality. The females of the 

 Sapucay series show very similar, but somewhat less decided size 

 variation, while those from the Province of Mendoza average con- 

 siderably smaller, yet show much variation among themselves. 



Measurements of the extreme individuals are as follows: 



^ To this species belongs the male material from Sapucay, Paraguay, recorded 

 by us as crenaticollis {Proc. Acad. Nat. Sci. Phila., 1907, p. 155). 



