JAMES A. G. REHN AND MORGAN HEBARD 225 



DESCRIPTIONS OF NEW GENERA AND SPECIES OF NORTH 



AMERICAN DECTICINAE 



(ORTHOPTERA; TETTIGONIIDAE) 



BY JAMES A. G. REHN AND MORGAN HEBARD 



A critical examination of the large series of North American 

 Decticinae in the Philadelphia Collections, including the material 

 secured by Rehn and Hehard in field work in the western United 

 States in 1909, 1910, 1912 and 1919, as well as a numV)er of series 

 from other sources, has brought to light some interesting novel- 

 ties. In the present paper we are presenting the descriptions of 

 two new genera and ten new species, reserving until a future time 

 the publication of the information we have secured on the general 

 relationship of the genera and species of the subfamily as found 

 in North America. 



Aglaothorax segnis^ new species. (PI. VIII, figs. 1 and 3; \A. IX, fig 1.) 



Separable from A. ovatus by the inflation of the meso- and 

 metazona of the pronotal disk, the median carina of the same 

 being more distinct caudad, the more elongate sub-elliptical pro- 

 notal disk, the less evident lateral carinae of the disk, shallower 

 and more elongate lateral lobes of the pronotum, apical instead 

 of preapical tooth on the inter-cercal' plates and the somewhat 

 longer and more slender male cerci. From .4. armiger, here 

 described, it can l)e distinguished by the rugulose and distinctly 

 carinate pronotal disk, the more evident lateral carinae of the 

 disk, the more inflated pronotal mesozona, the apical tooth on 

 the inter-cercal plates and the longer and more slender male 

 cerci. 



No relationship exists with any of the other species which have 

 been referred to the present genus. 



^ Segid.s — slow and sluggish. 



-This name is preferable to that of "infra-ceroal plates" used by Caudell 

 for the same structures, as their position and homology is better expressed 

 by the term here used. 



TRANS. AM. ENT. SOC, XLVI. 



