264 STUDIES IN AMERICAN TETTIGONIIDAE (oRTHOPTERa) 



Rio Grande, Costa Rica, III, 6, 1902, (M. Gary), 2 o^, 1 9,1 juv. d", 

 [Hebard Gin.]. 



Juan Vinas, Gosta Rica, III, 12, 1902, (L. Bruner), 3 d', 1 9 , [Hebard Gin.]; 

 VI, 28, 1909, (P. P. Calvert), 1 9 , [A N. S. P.]. 



Zent, Gosta Rica, IX, 26, (F. Knab), 19,1 juv. d', [U. S. N. AI.]. 



Cincinnati near Santa Marta, Colombia, VII, 9 to 10, 1913, 4000 to 5000 ft., 

 (M. A. Carriker Jr.), 3 9 , [Hebard Cln.]. 



La Gombre, Cordillera Occidentale near Call, Colombia, V, 19, 1914, (H. S. 

 Parish), 1 9, [A. X. 8. P.]. 



Conocephalus unicolor (Bruner) (PI. XXI, fig. 3.) 



1915. Conocephalus imicolar Bruner, Ann. Garneg. Mas., ix, p. 374. (June.) 



[Gorumbd, Brazil.] [Macropterou.s.] 

 1915. Co7iocephalus recticaudus Bruner, Ann. Garneg. Mus., ix, p. 374. 



(June.) (In part?) [Gorumba, Brazil.] [Brachypterous.] 



This species, with C. resacensis,^^ forms group E of the sub- 

 genus Xiphidion, these species showing a distinct tendency toward 

 the general form of the male cerci found in groups G, H and I. 

 The present insect has this tendency somewhat the more pro- 

 nounced, as may be observed by reference to the descriptions. 

 In general appearance the specimens before us resemble large 

 macropterous individuals of C. cinereus, but the somewhat nar- 

 rower vertex, longer limbs, larger male tegminal tympanum, 

 more ample lateral lobes of the pronotum, heavily armed ventro- 

 external margins of caudal femora, distinctive male cerci and 

 different ovipositor show how chstinct the two species really are. 



Description of d^. — Size large, form graceful but with limbs and wings 

 large and decidedly elongate. Head with dorsum of vertex, when seen from 

 lateral aspect, not strongly but distinctly ascending above the plane of the 

 occiput (much as in cinereus), fastigium of vertex slightly less than two-thirds 

 the width of proximal antennal joint, nearly two and one-half times as deep as 

 wide and narrowing with a very weak concavity to facial suture. Eyes mod- 

 erately large and not unusually protruding. Lateral lobes of pronotum with 

 cephalic margin straight to the very broadly rounded ventro-cephalic angle, 

 then straight to the sharply rounded ventro-caudal angle (which is distinctly less 

 than a right angle), caudal margin weakly convex to the broad and very shallow 

 humeral sinus, convex callosity distinct and moderately broad. Tegmina 

 elongate, slender, narrowing gradually to sharply rounded apex, veins and 

 veinlets very delicate, tympanum large and distinctly longitudinal with veins 

 pronounced, stridulating vein short with only proximal half decidedly swollen. 

 Cerci elongate with i)roximal i)ortion stout, mesal port ion elongate anil decid- 

 edly but evenly enlarged, at base (vertical and longitudinal) of mesal tiiird is 

 situated a large flattened internal horizontal looth directed a little ccijlialad 



fi3 Described in, Trans. Am. Knt. Soc., xli, p. 188, (1915). 



