68 PROCEEDINGS OF THE NATIONAL MUSEUM. VOL.XX. 



Dakota, Wyoming, Iowa, Nebraska and Missouri (Bruner), Kansas 

 (Thomas), Garden City, Kansas (Bruner, Osborn), Barber and Shaw- 

 nee counties, Kansas (Bruner), Colorado or Northern New Mexico 

 (Thomas), Colorado and New Mexico (Bruner), and Washington (bounty, 

 Texas (Bruner). 



This species can hardly be confounded with any other, though it 

 bears a close general resemblance to Campylacantha acutipennis, from 

 which it is strongly separated by the prominence of the base of the 

 lateral margin of the subgenital plate of the male. It is dimorphic in 

 wing length. 



18. AEOLOPLUS, new genus, 

 (a/o/lo?, variegated; o-rcXov, armor.) 



Body relatively short and stout, considerably enlarged at the meta- 

 thorax, even in the male. Head normal, the eyes moderately distant, 

 not very prominent except sometimes in the male, the summit well 

 arched, the fastigiurn slightly silicate between the eyes, the frontal 

 costa moderately broad, subequal, plane or nearly plane; antennae 

 moderately stout, cylindrical, equal, slightly longer (male) or slightly 

 shorter (female) than the head and pronotum together. Pronotum 

 stout, regularly increasing in size from in front backward, the disk 

 gently convex transversely, the prozona slightly and independently 

 tumid, with no or an exceedingly feeble median carina, distinguishing 

 it from the flat carinulate metazona; .posterior margin of pronotum 

 very obtusely angulate, the angle more or less rounded; prozona about 

 half as long again as the metazona, generally slightly broader than 

 long or quadrate. Prosternal spine conical, erect; interval between 

 niesosternal lobes of male about twice as long as broad, often clepsydra! 

 from the convexity of the inner margins of the lobes, of female vary- 

 ing from the same to quadrate, the metasternal lobes attingent or sub- 

 attingent in the male, a little distant in the female. Fore and middle 

 femora considerably tumid in the male, the hind femora relatively 

 short and stout, occasionally furnished interiorly in the male with a 

 basal tooth protecting the calcaria when the tibiae are closed upon the 

 femora. Tegmina generally completely developed, but often somewhat 

 abbreviate, rarely lobate. Subgenital plate of male with the lateral 

 margins very strongly ampliate and arched at the base, and furnished 

 with a distinct but not very prominent subapical tubercle, the apical 

 margin of the plate forming its inner base; furcula scarcely or not 

 apparent; cerci tapering, apically very slender, simple; terminal seg- 

 ments of female abdomen more or less considerably abbreviated, the 

 ovipositor only partially exserted. 



Aeoloplus regalis may be taken as the type. 



This genus is closely related to Hesperotettix, and these two genera 

 are the only ones in the section of Melanopli with ampliate base to the 

 lateral margins of the subgenital plate, in which the abdomen terini- 



