160 OETHOPTEEA. 



[5. Lepras interior, sp. n. 



Leprus wheeleri (in part.), Bruner, Science, xxi. p. 133 (1893) l ; Scudd. Cat. Orthopt. U.S. p. 36 

 (1900) 2 ; Psyche, ix. pp. 75, 76 (1900) 3 . 



As indicated in the table separating the species, the present insect comes closest to L. cyaneus, Cocker., but 

 differs from it in the much more slender hind femora, the relatively smoother head and pronotum, and 

 the shorter and more slender antennae, in addition to the characters there given. In colour L. interior 

 is pale cinereous above and testaceous beneath. In some specimens there is a faint tinge of ferruginous 

 about the pronotum and the base of the tegmina. The hind tibiae are pale glaucous, with a rather broad 

 basal pale portion. The hind femora show traces of a subapical dusky band externally, and the usual 

 black bands and the bluish tinge to the lower sulcus. 



Length of body, S 27, $ 36 ; of pronotum, <J 6-5, $ 8 ; of tegmina, d 29, $ 30 ; of hind femora, d" 15, 

 $ 17 millim. 



Hab. Noeth America, Salt Lake Valley, Utah (colls. L. Bruner & U.S. Nat. Mus.). 



This beautiful locust is to be met with on the bench-lands at an altitude of 300 to 

 500 feet above the present water-level of the Great Salt Lake. It occurs on both the 

 eastern and western shores. The Nevada reference given by Scudder evidently refers 

 to this species.] 



6. Lepras cyaneus, Cockereii. 



Leprus cyaneus, Cocker. Ent. News, xiii. pp. 305, 306 (1902) 1 ; Caudell, Proc. U.S. Nat. Mus. 



xxvi. p. 788 (1903) \ 

 Leprus wheeleri, Towns. Ins. Life, vi. p. 31 (1893) 3 . 

 Leprus wheeleri (in part.), Scudd. Cat. Orthopt. U.S. p. 36 (1900) 4 ; Psyche, ix. pp. 75, 76 (1900) 6 . 



Hab. North Ameeica, Colorado and New Mexico 1_5 (Gillette, Scudder), Salida 

 (A. N. Caudell), Texas (H. F. WicJcham). 



As this insect is common in the vicinity of Mesilla, New Mexico, it will undoubtedly 

 be found to occur also in the mountains of Northern Chihuahua. 



7. Leprus glaucipennis, Scudd. 



Leprus glaucipennis, Scudd. Psyche, ix. pp. 75, 76 (1900) l ; Cocker. Ent. News, xiii. p. 307 (1902)*. 

 Hab. North America, California x 2 . — Mexico, Durango and San Luis (Scudder *), 

 Hermosilla, Sonora (A. Koebele). 



As indicated in the table, this species shows much inequality in size between the 

 sexes. It also shows great variation in the comparative rugosity of the pronotum. 



[AGYMNASTUS, Scudd. 



Leprus (in part.), Scudder, Proc. Bost. Soc. Nat. Hist. xix. p. 32 (1877). 

 Agymnastus, Scudder, Canad. Ent. xxix. p. 75 (1897). 



While the present genus is not represented in the collections before me nor recorded 

 as having been found within Mexican territory, it belongs to the same faunal area. A 

 single species only has been described. 



