38 ORTHOPTEROUS GROUP INSARAE 



cerci of the male showing, however, much closer similarity to the 

 type found in the more northern species of Insara, and the armed 

 ventro-cephalic margins of the cephalic and median femora are a 

 not unusual condition in the Insarae, while this character is not 

 found as pronounced elsewhere in the Scudderiae. 



The colors given in the treatment of the genus Arethaea are taken 

 from Ridgway's recent "Color Standards and Color Nomencla- 

 ture," in the treatment of the other genera the same authors earlier 

 "Nomenclature of Colors" is used. 



The number of specimens examined in the preparation of the 

 present paper was 514; 282 males, 197 females, 1 gynandromorph 

 and 34 nymphs. Of these, 263 were collected by the authors. 

 Through the kindness of other workers and curators we have been 

 able to have before us the historic material in America l^elonging to 

 this group with but one or two exceptions, and of the few remaining 

 historic specimens of the group now in Europe a number have also 

 been examined. Our thanks to those who have assisted us in this 

 work are more adequately expressed in the discussion of the material 

 in the revisions of the larger genera. 



It would have been very pleasing to furnish much more definite 

 keys and generic descriptions, but, through study of the material 

 before us, we have found that one can not be as definite in giving 

 various characters as Brunner in his "Monograph der Phanerop- 

 teriden" and "Additamenta zur Monographic der Phaneropteri- 

 den, " without making misleading and false statements when all 

 of the species are considered. 



Key to the Genera of the Group Insarae 



A. Cephalic and median femora not subcarinate disto-dorsad. (Lateral 

 lobes of pronotum angularly inserted. ^ Abdominal segments not dilated, 

 with dorsal margins not produced mesad.) 



1 In using this term some explanation is needed to avoid confusion. Our 

 meaning is that the lateral lobes of the pronotum are joined to the dorsum 

 at an angle, so that these portions are separated by a distinct line. Among 

 the species of the group having this character there are some which have 

 this line further defined by low but distinct carinae, while in Insara covil- 

 lew the line is distinct but least pronounced. 



The opposite condition is found in the genus Arelhnen, in which there is 

 no pronounced demarkation between the dorsum and lateral lobes of the 

 pronotum. 



