290 PROCEEDINGS OF THE ACADEMY OF [PaRT II 



Blaptica dubia (Sen^ille) Plate XIV, figui-e 2. 



1839. Blabera dubia Serville, Hist. Nat. Ins. Orth., p. 78. [ 6 , Brazil ; Buenos 

 Aires, Argentina.] 



Montevideo, Uruguay, 2 9 



Rosario, Santa Fe, Argentina, 2cf , 1 ootheca, [A. N. S. P. and He- 

 bard Cln.]. 



Carcaraiia, Santa Fe, Argentina, 1 c?", 1 9 , [Hebard Cln.]. 



San Nicolas, Buenos Aires, Argentina, 3 cf, [Hebard Cln.]. 



Buenos Aires, Buenos Aires, Argentina, 2 cf , 1 9 , 2 juv., [Paris 

 Museum, A. N. S. P. and Hebard Cln.]. 



Cordoba, Cordoba, Argentina, 2 cf, [Hebard Cln.]. 



The series shows no very decided intensification or recession of 

 color pattern. The paler individuals, however, do not have the 

 pronotal maculation sohdly dark; in some, paired buffy flecks occur, 

 in occasional females the face-like marking, developed in certain 

 species of Blaberus is shown, while in some males a blurred lyrate 

 pattern is developed. 



Blaberus fraternus Saussiire. 



1864. Blabera fraterna Saussure Mem. I'Hist. Nat. Mex., Ill, p. 241. [d"; 

 South America, (The Antilles, Cuba?).] 



Gran Chaco, Argentina, 2 cf. 



Colonia Florencia, Rio Tapenaga, Chaco, Argentina, 1 cf , 1 9 . 



Chaco Austral, north of Icafio, Santiago del Estero, Argentina, 

 2 c^. 



Icafio, Santiago del Estero, Argentina, 4 cf , 3 9 . 



Rio Salado, near Icaiio, Santiago del Estero, Argentina, 2 cf , 1 9 . 



La Palisa del Bracho, Rio Salado, Santiago del Estero, Argentina.. 

 December, 1 cf. 



The species has previously been recorded from Argentina only 

 from Jujuy, in the province of the same name. 



Considerable color variation is shown by the series. In one male 

 and the three females , the dark pronotal marking spreads caudad, 

 covering the shoulders ; in but one of these specimens do pale points 

 show mesad in this dark area. In the males the most recessive 

 specimen shows a short medio-longitudinal pale streak and latero- 

 caudad of it two large oblique flecks of the same color in this area. 

 In one male with perfectly shield-shaped pronotal marking, this 

 area is solidly dark. In all, the dark pronotal area is terminated 

 by the caudal margin of the pronotum. 



Eublaberus argentinus new species. Plate XIV, flgm-e 8. 



This species appears to be nearest E. immacula (Saussure and 

 Zehntner), described from a female from Pernambuco, Brazil. 



