308 STUDIES IN AMERICAN TETTIGONIIDAE (oRTHOPTERa) 



then brown for 3.4 mm., followed by a greenish white annulus 1.1 mm. in 

 length, again brown for 7.1 mm., and with an annulus of similar coloration 

 1.9 mm. in length, then brown for 10 mm., with a similar annulus 1.1 mm. 

 in length distad of this brown. ^^ Dorsum of pronotum rounding sharply 

 into lateral lobes without decided lateral angles, except caudad at the 

 humeral sinus. Ovipositor long and rather slender, curved and but 

 weakly bent. 



Although the only large series before us (Tepic) exhibits a very 

 great amount of individual variation, the following measurements 

 show that in the present species an increase in size takes place 

 in its northward distribution. The ferriales from Tepic average 

 near the maximum measurements given below. 



Measurements {in millimeters) 



In the present species the amiuli of the antennae, so striking 

 in typical material from Panama, appear to decrease rapidly in 

 intensity in the northward distribution of the species. The 

 specimens from Costa Rica have these amiuli weakly indicated, 

 while those from the state of Vera Cruz have them obsolete. This 

 condition may be considerably emphasized in the material be- 

 fore us through these latter specimens being but indifferently 



^2 The male before us from Ancon has the antennae similarly marked. 

 " The type is somewhat smaller than this male. 



