272 STUDIES IN AMERICAN TETTIGONIIDAE (oRTHOPTERA) 



external margin of the cercus is broadly concave, the distal produced portion 

 has the margins subparallel with the apex rather broadly rounded. Subgenital 

 plate with distal margin weakly convex between the rather short disto-lateral 

 styles (which are very slightly shorter than in equatorialis) . Caudal femora not 

 elongate for the genus, proximal portion decidedly swollen, ventro-external 

 margins bearing a few small spines. Ovipositor moderately long, very slender 

 and very weakly curved (almost straight). 



Two brachypterous examples from the same locality agree in every respect 

 excepting in the humeral sinus, which is wholly obsolete, '» and in tegminal 

 and wing length. 



Series from Venezuela and Panama agree almost perfectly 

 with those from Guiana. The brachypterous specimens demon- 

 strate that the degree of sharpness of the rounded apex of the 

 tegmina varies somewhat, as does also the degree of reduction of 

 the tegmina. ^^ 



Large series from Trinidad show numerous specimens with the 

 vertex very slightly narrower than normal, while the majority of 

 the large macropterous males and two large brachypterous males 

 ■ have the cerci abnormally elongate, the flattened distal portion 

 being greatly produced and curved outward with the immediate 

 apex sharply rounded. This condition is due to elongation and is 

 decidedly variable in degree ; the extremes would suggest distinct 

 specific status, but in general contour no differences exist and all 

 intermediate conditions are present. 



The smallest brachypterous individuals from Trinidad agree 

 well with a depauperate condition found predominant in the 

 Lesser Antilles. These specimens are distinctly smaller than 

 typical brachypterous material, the male cerci are slightly 

 more attenuate while the ovipositor is shorter, some individuals 

 showing as well the extreme condition of tegminal al)l)reviation 

 for the species. 



A series of large macropterous and brachypterous specimens 

 from Philadelphia, Costa Rica, have the cerci decidedly produced 



'3 Macropterism is often, if not always, accompanit d by an api)r( ciable jiro- 

 duction of the caudal margin of the dorsum of tlu- i)r()notinn and a rosultai.t 

 increase in the depth of the humeral sinus. 



'* This variation, the weakly or not suffused genicular areas of the caudal 

 femora and th(> very weakly arcuate or almost straight ovipositor, appears to 

 constitute the means by which Rcnltenbacher sei)arated his series into what 

 he called brachyplermn and prnpittquum. Careful consideration would have 

 shown these characters to be mere variations and ea<'h found to various degrees 

 in various specimens. 



