110 ORTHOPTEKA. 



2. Ageneotettix deorum, Scudd. 



Chrysochraon deorum, Scudd. Bull. U.S. Geol. Surv. Terr. ii. p. 262 (1876) \ 



Eremnus deorum, McNeill, Proc. Dav. Acad. Nat. Sci. vi. pp. 268, 269, t. 6. fig. 29 (1897) 9 . 



Ageneotettix deorum, McNeill, Psyche, viii. p. 71 (1897) 3 . 



Hab. Nokth America, Mesilla Park, New Mexico (Morse). 



Possibly the insect seen by me in Chihuahua, and referred to under A. scudderi, may 

 have been A. deorum. 



3. Ageneotettix austraHs, sp. n. 



About the size of A. scudderi, from which it differs in its more robust form, the shorter tegmina and wings, 

 and the fewer spines on the hind tibiae. 



Head large, a little broader than the front edge of the pronotum ; the vertex of moderate width, shallowly 

 sulcate, the sides meeting in an obtuse angle in front, the lateral foveolse nearly twice as long as broad, 

 their inner upper angle broadly rounded. Antennae nearly ( $ ) or quite ( c? ) reaching the base of the 

 hind femora. The latter much heavier and longer than in the species to which it has been compared. 



General colour ferruginous-brown, more or less mottled with dark brown above, testaceous beneath. The 

 hind femora provided with the usual markings above, and with their apices and the basal portion of 

 the tibiae almost wholly black ; the latter scarcely showing any traces of the sub-basal pale annulus of the 

 other species. 



Length of body, J 16, $ 21 ; of antennae, d 8, $ 10 ; of pronotum, tf 3, $ 3*4 ; of tegmina, 6 10, $ 12 ; 

 of hind femora, c? 10, 2 13 millim. 



Hab. Noeth Ameeica, Phoenix, Arizona (Kunze). 



While the specimens before the writer were taken in Arizona, there can be but little 

 doubt that it also occurs in Mexico. 



AULOCARA, Scudder. 



Stauronotus, Thomas, Proc. Acad. Nat. Sci. Phil. 1870, p. 82. 



(Edocara, Scudd. Ann. Report U.S. Geol. Surv. West 100th Merid. p. 289 (1876). 



Aulocara, Scudd. Bull. U.S. Geol. Surv. Terr. ii. p. 266 (1876). 



Coloradella, Brunn. Rev. Syst. Orthopt. p. 123 (1893). 



This is still another genus of medium or rather small-sized locusts, the species of 

 which live in arid regions. All the known forms have blue hind tibiae, while those 

 of Ageneotettix have these members red. The group is represented in Mexico by 

 at least three species. 



Table for separating the Species of Aulocara. 

 A 1 . Tegmina and wings fully as long as, or longer than, the abdomen in 



both sexes. The hind femora not especially robust or elongate. The 



sexes not very unequal in size 1. elliotti, Thorn. 



A 2 . Tegmina and wings decidedly shorter than the abdomen in both sexes. 



The hind femora rather elongate and robust. The sexes very unequal 



in size. 



