Vol. XXX'iii] ENTOMOLOGICAL NEWS 153 



It is quite evident the genus is a modified member of the Amer- 

 ican group Phyllopterae, and not an isolated American repre- 

 sentative of the Old World Holochlorae assemblage. In addi- 

 tion the exact form of the cephalic face of the tympanum of 

 the cephalic tibiae is not a generic feature, as it varies in form 

 within the genus, of which eight species are before us. 



We are elsewhere recording or describing, in studies of Bra- 

 zilian Orthoptera, material of three of the species of the genus. 

 Of the section of the genus represented by crenulatuni alone in 

 llrunner's last key to the species of the genus, 6 we now have 

 before us five species: crcmtlatum (Brunner), simplex Scud- 

 der and three other new species. These forms all agree in the 

 important features given in the key for crenulatuni, i. e. the 

 ramus of the median vein of the tegmina diverging before the 

 middle; in the anal vein (posterior ulnar of Brunner) being 

 acute and crenulate in the male and obtuse in the female, there 

 crenulate only at the base ; in the caudal femora being unarmed 

 on the ventro-internal margin. 



The five forms may be differentiated from one another by 

 the following features : 



A. Marginal field of the tegmina regularly narrowing in width distad, 

 at distal fifth equal to decidedly less than one-half the greatest 

 tegminal width: apex of tegmina rounded or suhrectangulate. 



B. Pronotum more robust, less compressed, the greatest caudal 

 width of the disk contained one and one-third times in the 

 greatest length of the same. Tegmina with the ramus of the 

 median vein furcate at its middle ; free margin of the stridu- 

 lating field of the male tegmina rectangulate produced at the 

 apex of the stridulating vein ; base of the ulnar vein of the 

 tegmina strikingly marked with black. 



amazonicum new species. 



BB. Pronotum less robust, more compressed, the greatest caudal 

 width of the disk contained one and one-half times in the 

 grt-aU'st length of the same. Tegmina with the ramus of the 

 median vein furcate proximad of its middle; free margin of the 

 stridulating field of the male tegmina obtuse-angulate produced 

 at the apex of the stridulating vein; base of the ulnar vein of 

 the tegmina not strongly marked with black. 



6 Verhandl. K.-K. Zool.-bot. Gesell. Wien, XLI, pp. 169-170, (1891). 



