1921] NATURAL SCIENCES OF PHILADELPHIA. 285 



BLATTIXAE. 



Blatta orientalis Linnaeus. 



1758. [Blatla] orientalis Linuaevis, Syst. Nat., Ed. X, I, p. 424. [America; 

 the East; Russia; Stockholm, Sweden; Finland.] 



Tucuman, Tucuman, Argentina, 1 cf , [Hebard Cln.]. 

 • Buenos Aires, Buenos Aires, Argentina, 2 9 , [Hebard Cln.]. 



Periplaneta bmniiea Burmeister. 



1838. P[eriplanetn] brunnea Burmeister, Handb. Ent., II, Abth. II, Pt. I, p. 

 503. [cf, 9 ; Chile; Demerara (= British Guiana).] 



Las Garzas, Rio Las Garzas, Santa Fe, Argentina, 1 9 . 



PANCHLORINAE 



Panchlora thalassina Saiissure and Zehntner. 



1893. Panchlora thalassina Saussure and Zehntner, Biol. Cent.-Am., Orth., 

 I, p. 93. [cf , 9 ; Guatemala; Santa Catharina, Brazil; La Plata, Argen- 



tina.ii^] 



Villa Lutecia, near San Ignacio, Misiones, Argentina, January to 

 April, 1 c^ , 2 9 . 



Bella Vista, Rio Parana, Corrientes, Argentina, 1 9 • 



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



Barrancas, Banados del Rio Dulce, Santiago del Estero, Argen- 

 tina, 19. 



Troncal, Santiago del Estero, Argentina, 19,1 juv. 9 . 



Las Garzas, Rio Las Garzas, Santa Fe, Argentina, 1 9 . 



Tribonium guttulosum (Walker) 



1868. Nauphoela guttulosa Walker, Cat. Blatt, Br. Mus., p. 184. [cf. 

 Brazil.] 



Villa Lutecia, near San Ignacio, Misiones, Argentina, 1 9 . 



This species appears to be extremely close to T. conspurcatum 

 (Burmeister) . From Brunner 's detailed description of that species, 

 it would appear to differ in the unicolorous black antennae, and in 

 pronotum, the proportions of which are given as 4 by 5.6 millimeters. 



Length of body 19, length of pronotum 4, width of pronotum 7.1, 

 length of tegmen 15, width of tegmen 5.6 mm. 



Tribonium spectnun (Eschscholtz) 



1822. Blatta spectrum Eschscholtz, Entomographien, p. 85. [Santa Cath- 

 arina, Brazil.] 



• 1" We here select La Plata, Argentina, as the tjrpe locahty of this species. It is 

 closely related to P. cubensis Saussure and, in the very large series of the genus be- 

 fore us, is recognizable only from material from Paraguay and northern Argentina. 

 The Santa Catharina record may, therefore, represent the same species, but we 

 are confident that that from Guatemala is based on either a misidentification or 

 material incorrectly labelled. 



