48 



NEW NORTH AMERICAN ACRIDID.E BRUNER. 



The followiug new species and genera are described in the present 

 paper : 



Acridinse. 



Mesops cyliudricus. 

 Pyrgomorphinre. 

 Dracotettix geu. nov. 



Dracotettix monstrosus. 

 Tryxalinse. 



Ochrilidia crenulata. 



cinerea. 

 Mermiria texana. 



maculipennis. 

 Syrbula acuticornis. 

 Eritettix gen. nov. 



Eritettix variabilis, 

 abortivus. 

 Bootettix geu. nov. 



Bootettix argeutatus. 

 Pedioscirtetes pulcbella. 

 (Edipodin*. 



Psoloessa Buddiana. 



(?) eurotia;. 

 Arphia Saussureaua. 



Aulocara (?) Scudderi. 

 Mestobregrna pulchella. 

 Conozoa texana. 



alboliueata. 

 Koebelei. 

 Trimerotropis cyaneipennis. 

 azurescens. 

 bifasciata. 

 californica. 

 modesta. 

 tbalassica. 

 (?) pacinca. 

 perplexa. 

 Circotettix lapidicolus. 

 sbastanus. 

 (Edipoda (?) occidentalis. 

 Thrincus aridus. 



maculatus. 

 Haldemanella Saussure. 

 Haldenianella robusta. 



Sub-family ACRIDINiE. 

 Mesops cylindricus sp. nov. 



Very similar to M. wyomingensis Thos. in structure and general ap- 

 pearance, but differing from that insect in color and its considerably 

 larger size. 



Head long, considerably longer than the pronotum; the face very 

 oblique, straight; cone of the vertex horizoutal, the margins raised, the 

 center sulcate and furnished with a well defined median carina in both 

 sexes; frontal costa expanding below, sulcate to the labrum. The sides 

 sharply defined. Antennae ensiform, triquetrus, rather heavy, and 

 somewhat exceeding the length of head and pronotum combined ; oc- 

 ciput gently rounded, slightly expanding posteriorly. Pronotum sub- 

 cylindrical. The anterior edge slightly expanding, lower lateral edge 

 a very little upwardly arcuate in the middle; the anterior and posterior 

 extremities gently rounded, median carina distinct throughout, most 

 prominent on last lobe, which is slightly granulate ; last transverse 

 impressed line faint, to the rear of the middle. Tegmina and wings 

 very delicate, a little more than one-half as long as the abdomen, and 

 furnished with few veins, their apices rounded. Posterior femora 

 slender, gently and evenly tapering, about two-thirds the length of the 

 abdomen in both sexes. The abdomen rather long and cylindrical, in 

 the male terminating with a long wedge-shaped last ventral segment 

 or process. Valves of the female ovipositor very short and nearly ob- 

 scured by the overlapping anal processes. 



