REHN AND HEBARD 261 



arated by the very different fastigiuin of Iho vertex, coloration 

 (which in hfe is probably very distinctive and in dried specimens 

 before us is still striking in the male sex and in a few of the fe- 

 males), larger and more bulging eyes and male cerci which are 

 very different from any other South American species, being of 

 the type found in C. brevipennis, but differing from that species 

 in proportions, contour of apical portion and external instead of 

 mesal position of apex. 



The ventro-cephalic margins of the cephalic and median tibiae 

 are also distinctive in having, in ever}'' specimen before us, from 

 one to the four of these margins armed with seven instead of the 

 normal six spines ^^- this is never found in saltator in the regions 

 where the distribution of the two species is coextensive,''^ in 

 which regions the ovipositor of the present species also averages 

 distinctly shorter. 



The species agrees in width of vertex with C. versicolor but is 

 otherwise very different. Giglio-Tos considered his A", fcstae^'^ 

 ( = versicolor) more nearly related to the present species than we 

 find is the case after study of all the American species. 



Size medium, form veiy robust, coloration unusual. Fastigium 

 of vertex narrow and strongly ascending above plane of occiput 

 but not unusually produced, greatest width slightly less than 

 one-half that of proximal antennal joint, two and one-half times 

 as deep as wide, narrowing very slightly to facial suture. Eyes 

 large and protruding. Lateral loljes of pronotum of moderate 

 width, cephalic margin straight to the broadly rounded ventro- 

 cephalic angle, then straight to the narrowly rounded ventro-cau- 

 dal angle, caudal margin weakly concave and often subsinuate, 

 humeral sinus exceedingly weak or wholly absent, convex cal- 

 losity exceedingly narrow but distinct. Tegmina normally 



^^ The careful work of Gip;lio-ToH is shown by his remarks on tliis less not ice- 

 able differentiation, Boll. Mus. Zool. Anat. eoinp. I'niv. Torino, xi, no. 2'A'2, 

 p. 29, (1896); a character which had been wholly overlooked by Redtenbacher. 



" Fou'r depauperate brachypterons individuals of C- mltalor from Dominica 

 and Trinidad a^ree in this respect, and represent the only specimens of the 

 subgeiuis Xiphidion which possess a supplementary seventh spine, excei)tins 

 material of C. aiujusiijrons; moreover such depauperate females from those 

 islaruls have the o\-ipositor length quite as short as in the present siiecies. 



«o Boll. Mus. Zool. Anat. comp. Univ. Torino, xiii, no. 311, p. 93, (1S98). 



TR.WS. .\M. EXT. SOC, XLI. 



