266 STUDIES IN AMERICAN TETTIGONIIDAE (oRTHOPTERA) 



In the three specimens before us the armament of the ventro- 

 external margins of the caudal femora is 4-4, 4-5 and 5-6 spines. 



The species is an inhabitant of the lowlands (probably marshes) 

 of the upper Paraguay. 



Specimens Examined: 3; 1 male and 2 females. 



Corumba, Brazil, III, (H. H. Smith), 1 d^, 2 9 , topotypes, [U. S. N. M. and 

 A. N. S. P.]. 



Conocephalus equatorialis (Giglio-Tos) (PI. XXIII, figs. 16 and 17.) 

 1898. X[iphidium] equaloriale Giglio-Tos, Boll. Mus. Zool. Anat. comp. 

 Univ. Torino, xiii, no. 311, p. 92. [Gualaqiiiza and San Jose, Ecuador.] 



The present species finds nearest relationship in C. saltator, 

 differing from macropterous examples of that species in the 

 narrower vertex, darker coloration of the discoidal and anal fields 

 of the tegmina and adjacent portions of the wings when at rest, 

 more iridescent hyaline area of the wings, green or greenish cerci 

 of similar general form but distinctly less specialized, and ovi- 

 positor which is normally shorter than in typical saltator. Fur- 

 thermore the present insect is the only American species known 

 to us which always has the ventro-internal margins of the caudal 

 femora armed. In the examination of several thousand examples 

 of other American species of the genus, but seven specimens, two 

 C. fasciatus fasciatus, one C. spinosus, one C. saltator and three 

 C. attenuatus, have been found by us bearing a single spine on 

 one of the ventro-internal margins of the caudal femora. 



Size medium to small," form moderately slender. Fastigium 

 of vertex narrow, greatest width slightly less than to slightly more 

 than one-half^ that of proximal antennal joint, two and one-half 

 to two and three-fourths times as deep as broad, narrowing with 

 scarcely any concavity to facial suture. Eyes moderately large, 

 but slightly protruding. Cephalic margin of lateral lobes broadly 

 convex to the ventro-caudal angle, with the ventro-cephalic angle 

 very weakly indicated, ventro-caudal angle sharply rounded (dis- 

 tinctly less than a right angle), caudal margin nearly straight (very 

 weakly convex) to the distinct but shallow humeral sinus, convex 



^7 The typical series from Ecuador, of which a pair are in tlie Academy, 

 averages decidedly smaller than the material here recorded and the tegmina 

 of many specimens of that series are semi-macro pterous. 



"8 Material having this greatest width of vertex is from British Guiana, this 

 does not appear to be the normal condition for the species. 



