168 STUDIES IN AMERICAN TETTIGONIIDAE (oRTHOPTERA) 



both conditions, the normal type is brachypterous in all of which 

 we have sufficient material to reach any conclusion; two of these,. 

 stictomerus and spartinae, alone show a macropterous type ap- 

 parently in preponderance in portions of their southernmost dis- 

 tribution. 



The ovipositor length is taken from the base of the basal plica 

 to the apex of the ovipositor, it has been a general practice to 

 take this length from the juncture of the subgenital plate to the 

 apex of the ovipositor, but due to the mobility of the subgenital 

 plate this method can not be as accurate. In consequence our 

 measurements average about .4 mm. less than they would if 

 taken the other way. 



The spines of the ventro-external margins of the caudal femora, 

 when present in fasciatus fasciatus, fasciatus vicinus and hrevi- 

 pennis, are almost invariably decidedly smaller than in the species 

 in which such spines are normally present. 



The genicular lobes of the caudal femora are always unispinose 

 in occidentalis, stridus and saltans, normally so in nemoralis and 

 apparently so in allardi and resacensis; in all of the other species 

 they are normally bispinose. A single abnormal specimen of 

 spartinae has one of these genicular lobes trispinose. The varia- 

 bility of this character in the majority of species causes it to be 

 of little diagnostic importance. 



The abdominal coloration is important, particularly in the 

 males of the species of this genus. Some forms are distinctive 

 in coloration and these factors are discussed in the specific treat- 

 ment. Man}- species are similar in having head, pronotum, 

 thorax and limbs green, with a dark medio-dorsal stripe on head 

 and pronotum usually narrowly bordered by buff. In the specific 

 treatment of such species, it has not been considered necessary 

 to discuss these features unless specific variations occur. 



As the present work is considered by no means monographic, 

 we have thought it best to omit detailed descriptions under the 

 treatment of all but the new species. The most important char- 

 acters are given in the keys and tables of the introduction. In 

 the following treatment of the known species, we have more 

 fully discussed these characters where further details of interest 

 exist, and have also considered other less important characters 

 which have been omitted from the kevs and tal)les of the intro- 



