1920.] NATURAL SCIENCES OF PHILADELPHIA. 229 



or extremely close to, Serville's species. The insect previously 

 called livida by Caudell^*' and the present author^' is quite close, and 

 we have identified it as Eumusonia viridis Giglio-Tos,^* which was 

 recently described from a single male from Salto Grande, State of Sao 

 Paulo, Brazil. The species viridis has both green and brown chroma- 

 tomorphs, the green apparently the more infrequent, but a single 

 specimen of it being in the series of six individuals of the species 

 now before us. 



Thesprotia fuscipennis Saussui-e and Zehntner. 



1894. Thesprotia fuscipennis Saussure and Zehntner, Biol. Cent.-Amer., 

 Orth., I, p. 171. [Rio de Janeiro, Brazil.] 



Espirito Santo. One male. [Hebard Cln.] 



This specimen is fully typical of the species, but unfortunately 

 lias the supra-anal plate damaged, as did the male type, so that the 

 character of this important part is as yet unknown. 



CREOBOTRINAE. 



Acanthops erosa Serville. 



1839. Acanthops erosa Serville, Hist. Mat. Ins., Orthopt., p. 165. [Brazil.] 



Bonito, State of Pernambuco. January, 1885. One female. 

 [U. S. N. M.] 



The present species, as we understand it, is quite close to A. fal- 

 cataria, from which it readily can be separated by the narrower 

 proximal section of the marginal field of the tegmina. 



Acanthops rehni (Cliopard)." 



1913. P[lesiacanthops] rehni Chopard, Bull. Soc. Entom. France, 1913, p. 

 55, figs. 1 to 3. [Gran Chaco, Argentina.] 



Goyaz, State of Goyaz. Two males. [Hebard Cln.] 

 This species is extremely variable in size in the male sex, as a 

 series of nine males from Sapucay, Paraguay, now before us, shows. 

 Females from the latter locality are appreciably larger than the 

 type measurements. 



The genus Plesiacanthops, which was erected for tuherculata Saus- 

 sure and the present species, does not appear to us to be very sharply 

 distinguished from true Acanthops, three species {hrunneri, falcataria 

 and erosa) of which latter division are now before us. Chopard has 



16 Journ. N. Y. Entom. Soc, XII, p. 184, (1904). 



"Proc. Acad. Nat. Sci. Phila., 1907, p. 1.58; Ibid., 1913, p. 205. 



18 Bull. Soc. Entom. Ital., XLVII, p. 8, (1916). 



'9 This is the species recorded by us from Paraguay as Acanthops sinuata (Proc. 

 -Acad. ISiat. Sci. Phila., 1907, p. 1.59). We are enabled to correct this determina- 

 tion by the acquisition of true sinuata {= falcataria) from the Guianas. 



