JAMES A G. REHN 267 



We have gone quite carefully into the relationship of this form 

 and P. yhthisicum (Linn.) [ = necydaIo{des Linn.] under which 

 Redtenbacher placed it as a synonym. We have had French 

 Guiana material of the older species determined by Chopard-® 

 for comparison, as well as other material of the genus. The 

 Guianan phthisicum is, as far as we can ascertain, possessed of a 

 more slender head and thorax, in the male at least, and a much 

 more tuberculate dorsal surface of the same regions, particularlj- 

 of the mesonotum. The marginal field of the tegmina is pale 

 in castaneum, being concolorous with the anal section of the same, 

 but a shade of greenish yellow, instead of the two being somewhat 

 differentl}^ colored and the general contrasts less decided as in 

 phthisicu?7i, while the velvet black section is more extensive in 

 length and breadth in castaneum. In fhthisicum the antennae 

 are pale rufescent of variable depth in the individuals we have 

 seen. Stoll's hioculatum^'^ may prove to be the same as casta- 

 neum and if so would have priority, but the antennae are figured 

 as pale and we provisionally place it under -phthisicum. 



Prisopus cornutus Gray 



1835. P[risopus] cornutus Gray, Syn. Phasm., p. 43. ["India."] 

 Para, Para. One female. [Cornell University.] 

 This striking species was never properly recorded for locality 

 until Redtenbacher referred material from Surinam and Cay- 

 enne to it. The very characteristic auriform head lobes will 

 readily distinguish it from the other species of Prisopus. 



ACRIDIDAE 



ACRYDIINAE 



Eomorphopus antennatus (Bolivar) 



1887. A[morp}iopus] antennatus Bolivar, Ann. Soc. Entoni. Belg., xxxi, p. 

 250, pi. 5, figs. 19, 19a and 19b. [Upper Amazonia.] 



Abuna, Rio Madeira. (Mann and Baker.) One female. 

 This species has also been recorded by us from Venezuela.-^ 



28 Ann. Soc. Entom. France, Ixxx, p. 339, (1911). 



2' Natuur. Afbeeld. Beschr. Spooken, etc., pp. Gl, 77, pi. xx, fig. 76, (1813). 



[Surinam.] 



28 ProG. Acad. Nat. Sci. Phila., 1904, p. 664, (1904). 



TRANS. AM. ENT. SOC, XLII. 



