240 STUDIES IN AMERICAN TETTIGONIIDAE (oRTHOPTERA) 



above which the produced portions are bent suddenly upAvard 

 thence again horizontal, their apices reaching as far as the 

 extremity of the enlarged proximal portion of the styles; between 

 these productions the distal margin of the plate is roundly emar- 

 ginate at an angle of a little less than ninety degrees. Ventral 

 margins of cephalic and median femora armed with six well 

 spaced spines. Caudal tibiae armed at distal extremities with 

 three pairs of spurs. Size medium for the genus. 



Conocephalus longipes (Redtenbacher) (PI. XXII, fig. 1; XX,; 1, 2, 32 

 and 33; XXIV, 1.) 



1891. Xiphidium longipes Redtenbacher, Verh. k.-k. zool.-bot. Gesell. Wien, 

 xli, p. 505, pi. iv, figs. 81 a and b. [Buenos Aires [Argentina]; Montevideo 

 [Uruguay]; Rio Grande do Sul and Santa Catharina [Brazil].] 



The present insect is closely related to C. vitticolUs, but may 

 be readily separated by the narrow fastigium of the vertex, 

 more slender form, less extensive enlarged portion of male cerci 

 overhanging the cereal tooth, somewhat narrower ovipositor in 

 the female and armed ventro-external margins of the caudal 

 femora. 



Redtenbacher has given a portion of the major differences, 

 but has misrepresented others in his brief and unsatisfactory 

 original description. 



Vertex rather decidedly produced for the genus.^" Fastigium 

 of vertex but little over one-half as wide as proximal antennal 

 joint, narrowing with a distinct but weak concavity to the facial 

 suture, when seen from front distinctly twice as deep as great- 

 est width. Eyes small. Lateral lobes of pronotum of moderate 

 width, cephalic margin weakly arcuate, with scarcely a trace of 

 the ventro-cephalic angle, to the broadly rounded ventro-caudal 

 angle which is a little less than ninety degrees, caudal margin 

 weakly arcuate to the broad and distinct humeral sinus, convex 

 callosity very l)road. Tegmina long and slender, ^^ particularly 

 toward the sharply rounded apex; tympanal field of males rather 



'" This species and C gracillimus have the vertex more distinctly produced 

 than in any other American forms known to us, and agree in having the occiput 

 ascending evenly toward the vertex and the vertex ascending slightly more 

 decidedly but very nearly in the same plane. In other respects the two si)ecies 

 are greatly dissimilar. 



31 The extremes of tegminal length for this and the o^^her species here treated 

 are given in tubular form on pages 237 to 239. 



