194 OETHOPTERA. 



Hab. North America, plains east of the Eocky Mountains from Wyoming and 

 South Dakota to Texas and New Mexico 1_8 . — 1 Mexico. 



It is quite likely that the Mexican individuals referred to this species belong either 

 to B. intermedia or B. virescens, though some of them may appertain to B. magna, 

 as undoubted specimens of that insect occur in both Texas and New Mexico not 

 far from the international boundary-line. Apart from B. magna, which has a wide 

 distribution, all the other members of the genus appear rather restricted to special 

 localities. 



2. Brachystola ponderosa, sp. n. 



Yery large and robust, with ample pronotum, in which the granulations of the disc are numerous, fine, and 

 rather evenly distributed. Tegmina with comparatively few, but large inaculations. 



Occiput rounded, smooth, without the definite median longitudinal carina and transverse rugae found in 

 B. magna ; the fastigium of the vertex at about a right angle (tf ) or a trifle obtuse ( $ ), the bounding 

 walls blunt ; frontal costa narrow above, evenly expanding beneath, sulcate to a little below the ocellus. 

 Eyes small, not prominent. Antennae of moderate length, rather stout, filiform. Pronotum moderately 

 elongate, the disc about twice as wide behind as in front, the median and lateral carina? prominent, the 

 former evenly and roundly arcuate when viewed in profile, the latter somewhat sinuate near the middle ; 

 posterior edge broadly and gently rounded, the centre very slightly hollowed out. Tegmina about as in 

 B. magna, but with few mottlings. Hind femora very large and robust in the male, more slender 

 in the female. Apex of male abdomen produced- into a slender beak-like process, which is deeply sulcate 

 above and gently notched at the tip. 



General colour (presumably, as the specimens before me have been immersed in spirits) greenish, varied with 

 testaceous, ferruginous, and piceous in the pattern found on specimens of B. magna. Face between the 

 lateral carinae pale testaceous, the lower portion of the costa darker. Antennae pale, the apical portion 

 somewhat infuscate. 



Length of body, <$ 53, $ 60 ; of pronotum, <S 17'5, $ 23 ; of tegmina, <$ & $ , 10 ; of hind femora, c? 34, 

 $ 30 ; of antennae, 6 22, $ 23 millim. 



Hab. Mexico, Guaymas (coll. Calif. Acad. Set.). 



Two males and two females. This species seems to be considerably larger than its 

 nearest ally, B. magna, and in life undoubtedly would be still larger than the dimen- 

 sions given here. It seems to be more uniformly coloured than B. magna, although 

 the knees of the hind femora are decidedly blacker than in that insect. B. ponderosa 

 seems to be rather restricted in its distribution, since no other specimens have come to 

 the present writer's notice. 



3. Brachystola intermedia, sp. n. 



This form is most nearly related to B. magna, but differs from that species in its somewhat smaller size and 

 more robust form. In B, intermedia the pronotum is correspondingly shorter and broader, and has the 

 disc more evenly and coarsely granulose, while the tegmina are more nearly circular than in B. magna. 

 It is also of a more uniform brownish-ferruginous colour than are any of the other species here treated. 

 The synoptic table given above will show quite clearly the chief characteristics of each, therefore no 

 further description of B. intermedia is necessary. 



Length of body, $ , 47-50 ; of pronotum 14, of tegmina 8, of hind femora 24 millim. 



Hab, Mexico, Magdalena, Sonora? (U,S. Biol. Svrv,), Mazatlan (Woodruff). 



