374 Annals of the Carnegie Museum. 



gg. Ferruginous-yellow. Abdomen black, interrupted before 

 the apex on the dorsum by a yellowish band. 



fesla Giglio-Tos. 

 cc. Cerci of male slender, sensibly acuminate, the apex not, or but little, 



depressed caizanus Giglio-Tos. 



hb. Ovipositor very long. Tegmina abbreviated (Uruguay). 



doryphorus Karny. 

 A A. Anterior tibiae armed below with nine to ten spines. . . aherrans Redtenbacher.' 



114. Conocephalus unicolor sp. nov. 



A large, pallid, robust insect, with fully developed tegmina and 

 wings, in which there are no variations of coloration, as is the case in 

 most of the species of the genus. Most nearly related to longipes of 

 Redtenbacher, as may be ascertained by referring to the preceding 

 synopsis of the species found in South America. 



Fastigium moderately robust, viewed from in front with its lateral 

 margins divergent. Antennae robust and very long. Pronotum much 

 as in C. recticaudus described hereafter. Tegmina fully developed 

 and reaching the apex of the hind femora, in the male heavy and broad 

 on the basal two-fifths, much narrowed beyond, in the female tapering 

 evenly from the base, the apex rounded. Hind femora below provided 

 externally with four to six rather prominent spines. Male cerci ro- 

 bust, tapering, the extreme apex depressed inwardly, toothed near 

 the base. Subanal plate of male not, or very faintly, carinated at 

 middle; the styles small, filiform; the apex of the plate subangulate. 

 Ovipositor large, straight. 



General color pale greenish, the wings faintly rose-tinted. An- 

 tennae with the apex of joints narrowly fuscous. Apex of the hind 

 femora briefly infuscated. Spines of hind femora and tibiae dusky. 



Length of body, cf, 16 mm., 9, 21 mm.; of pronotum, c/', 3.1 

 mm., 9 , 3.6 mm.; of tegmina, cf, 16 mm., 9 , 20 mm.; of hind femora, 

 cf , 13 mm., 9 , 16 mm. 



Habitat. — The types come from Corumba, Brazil, where they were 

 taken in March. Additional specimens were collected during April 

 (H. H. Smith). The female type bears the additional label "2166" 

 on red. They are the property of the Carnegie Museum. 



115. Conocephalus recticaudus sp. nov. 

 A moderately large and robust species with somewhat abbreviated 

 tegmina and wings in both sexes. As indicated by the accompanying 

 " The X. cinereum Thunberg from Jamaica has not been placed. 



