50 STUDIES IN AMERICAN TETTIGONIIDAE (oRTHOPTERa) 



Color Notes. — In general color there is some variation in the 

 depth of the same, but the most noteworthy features of this char- 

 acter found in both sexes are the amount of grayish suffusion on 

 the dorsal surface of the head and pronotum, the strength and 

 extent of the shining black area caudad on the lateral lobes of 

 the pronotum and to a lesser degree the width and extent of the 

 pale caudal area on the same lobes. In the male the tegmina 

 vary considerably in the tone of the ochraceous of the disto- 

 dorsal section and humeral angle of the same, occasionally this 

 being even dark rufous, while the lateral section of the proximal 

 abdominal segments and a dorsal area of the pleura are variable 

 in the presence or absence, and depth when present, of shining 

 black. 



Geographic Variation. — There appears to be no geographic vari- 

 ation except that the males show an increase southward in the 

 general size of the pronotum. This is, of course, to a degree 

 correlated with variation in general size, but only to a certain 

 extent. The females show no appreciable geographic variation. 



Measurements {in millimeters) 



E o 



-^ 1 °'oS^'^ o 



t Is '^is g ::::§ ^ ^ 



O -.^3 -fJcS -iS^^oo-s o o 



■£ So So "3 s '5'm S Sii 5 



r?" S 2i| £| ^1 g:5| §| § 



Deep Pond, New York ... . 18 9.5 6.5 7.8 4 14.8 .... 



Ne'svfoundland, New Jersey 19.5 9.4 6.3 8.5 4.6 16.2 .... 



Guthrieviile, Pennsylvania. 2.3.4 10.8 7 8.5 5 15.6 .... 



Guthrie ville, Pennsylvania. 21.2 9.8 6.5 8 4.5 14.6 



Plummer's Island, Mary- 

 land 20.9 10.1 7.2 7.5 4.1 16 



Plummer's Island, Mary- 

 land 20 11.2 7.8 7.8 5 17 



Glen Echo, Maryland 24.3 10 7.1 7 4 16 



Gun Lake, Michigan 19.5 9 6 8 4.9 15.4 .... 



Vigo County, Indiana 19 10 6.8 7.8 4.5 16.8 .... 



Kentucky 19.5 10.4 7.5 9 5 17 



Molino, Illinois 20.4 9.6 7 8.2 4.9 16.5 .... 



" Body lengt.h is the most unreliable of any of the measurements here given, 

 depending as it does on the degree of compression or extension of the abdo- 

 men; a considerable factor when shrivelling or stuffing are taken into consid- 

 eration. However, as this measurement is the one most generally given 

 we are including it here, as elsewhere, as a general index to the bulk of the 

 insect. 



