PSOLOESSA.— STIEAPLEUEA. 105 



[4. Psoloessa ferruginea, Scudd. 



Psoloessa ferruginea, Scudd. Proc. Bost. Soc. Nat. Hist. xvii. p. 513 (1875) 1 ; Cent. Orthopt. p. 25 

 (1879) 2 ; McNeill, Proc. Dav. Acad. Nat. Sci. vi. p. 274 (1897) 3 . 



Hab. Nokth Ameeica, Texas and Arizona 1_3 .] 



STIKAPLEURA, Scudder. 



Dociostaurus, Scudder, Rep. U.S. Geogr. & Geol. Surv. W. 100th Merid., App. J J, pp. 507, 510 



(1876) (necFieber). 

 Stirapleura, Scudder, loc. cit. p. 510 (1876) ; McNeill, Proc. Dav. Acad. Nat. Sci. vi. p. 269, t. 6. 



figg. 30 a-c (1897). 



The insects which comprise this genus are of medium size, and in colour are usually 

 cinereous, testaceous, or ochraceous, more or less heavily mottled and streaked with 

 brown and black. In their distribution they seem to be more especially confined to 

 slightly arid localities covered sparsely with vegetation, particularly with various short 

 grasses. In fact, they are genuine " grasshoppers " in all regions where found. The 

 genus is represented in both North and South America, and wherever the species occur 

 they are moderately common. On both continents representatives are to be met with 

 at least fifty degrees from the Equator. With such a wide distribution, and, at the 

 same time, possessing no special requirements other than open country with a limited 

 supply of grass upon which to feed, it is not surprising that there should be a rather 

 large number of known forms. Though very few of them have been captured as yet 

 on the plateaux regions of Mexico and Central America, the proper localities for these 

 insects, the following can safely be said to belong to the fauna treated in the present 

 work. 



Table for separating the Species of Stirapleura. 



A 1 . Posterior tibiae with the apical spurs on the inner side not very 



unequal [1. ornata, Scudd.] 



A 2 . Posterior tibiae with the apical spurs very unequal, the apical one 

 being at least one and one-half times as long as the other. 

 b l . More slender. Size rather small. 



c 1 . Tegmina and wings somewhat abbreviated, considerably shorter 

 than the abdomen in the $ , the former acuminate. [Southern 



Mexico.] 8. brachyptera, sp. n. 



c 2 . Tegmina and wings normal, longer than the abdomen even in 



the $ . [S.W. U.S. and Mexico centrally on the plateaux.] . 3. pusilla, Scudd. 

 A 2 . More robust. Size larger. 



c\ Lateral foveolse about twice as long as broad 2. decussata, Scudd. 



c 2 . Lateral foveolse scarcely, if at all, longer than broad ; angulate 

 or rounded. 

 biol. centr.-amer., Orthopt., Vol. II., January 1905. Pp 



