HANCOCK 



33 



In the posterior tarsi the first segment is as long or longer 

 than the last two. The tarsi are serrulate above, and below 

 divided into three little acute, obtuse, or flat pulvilli; the 

 second segment is very small in all the tarsi; the claws are 

 dentate at the base beneath.* 



The first abdominal sclerite ]:)resents at the caudal margin 

 of the dorsal portion various modifications in the different 



Fig. 13. Peculiarities of the first abdominal sclerites: a and/ lateral and 

 dorsal aspect of Tettix armosus ; b and h, Parateittx texanus ; 

 c and i, Tettix granttlatus, male; rfand/, Tettix ornatus trian- 

 gularis, male; e and g, Tettix gibbosus, male. 



species. It is observed by elevating the pronotum. In 

 Tettix granulatiis the margin has a raised eminence, folded, 

 and projecting caudad. The various figures here given show 

 some of the variations in this portion of the anatomy. 



* ABDOMIN.AL APPENDAGES. 



It is of interest to compare the characters of the abdominal appendages, though, it 

 must be said, in these orthoptera which require the most delicate handling, they are not 

 easily accessible. I have found that by bringing water nearly to the boiling point and 

 immersing the specimen for about a minute usually accomplishes the desired softening in 

 small species so that the abdomen can be pressed to one side, after the legs have been 

 pushed down. This is of course assuming the specimen is a pinned example. This process 

 is required owing to the almost immovable pronotal process being in the way. Both male 

 and female characters of the genitalia afford some distinctive features, but for the reasons 

 named they are less used in classification than the vertex, pronotum, pulvilli, etc. {See 

 Plate XI.. Figs, i-ia and 5-53.) 



