196 ORTHOPTEEA. 



6. Brachystola behrensi, Scudd. (Tab. II. fig. 6, $ .) 



Brachystola behrensi, Scudd. Proc. Bost. Soc. Nat. Hist. xix. pp. 33, 34 (1877) ] ; -Saute. Addit. 

 Prodr. (Edip. pp. 163, 164 (1888) 2 ; Scudd. Proc. Bost. Soc. Nat. Hist, xxvii. pp. 206, 217 

 (1896) 3 . 

 Hah. Mexico 1 ~ 3 , Sinaloa (J. Behrens), Durango or Sinaloa (Forrer: 1 <j , 3 $ ). 



This species is readily distinguished from B. magna and its allies by the prolonged 

 and broadly rounded hind margin of the pronotal disc, and by the pale-veined dark 

 tegmina ; and from the following, B. eiseni, by its larger size, and paler and greener 

 colour. 



7. Brachystola eiseni, sp. n. (Tab. II. fig. 5, $ .) 



A rather small, slender, pale vinaceous-brown species, with angulate, posteriorly bordered pronotum. 



Head fairly robust, occiput smooth, without a well-defined longitudinal median carina ; vertex broad, the 

 fastigium in nowise sulcate, its bounding walls not elevated, the insect in this respect similar to 

 B. mexicana ; eyes rather large and fairly prominent for the genus, nearly ( S ) or quite (?) as long as 

 the cheeks below them ; frontal costa prominent, its upper end roundly continuous with the fastigium, 

 the sides rapidly and evenly diverging below, shallowly and narrowly sulcate, the surface minutely 

 punctate ( S ) or finely aciculate ( $ ) above and on the sides of the ocellus. Pronotum elongate, rather 

 narrow in the male, but moderately broadly expanding posteriorly in the female ; median and lateral 

 carina? prominent, nearly straight, disc with the anterior lobe provided with fairly prominent raised 

 points, the posterior one nearly smooth, front margin a little advanced upon the base of the occiput, hind 

 margin angulate, in the male a little obtuse, in the female slightly acute. Tegmina rather larger than 

 usual, especially in the male, the background dark with paler veins. Hind femora robust and longer in 

 the male, more slender and shorter than the abdomen in the female. Last ventral segment of male abdomen 

 with the narrowed apical portion gently bent downward and rather deeply but narrowly fissured. Hind 

 tibiae provided with 9 spines in the outer row. 



General colour very pale vinaceous-brown, inclined to lavender on the head, disc of pronotum, and legs. 

 Antennal grooves, centre of fovea of frontal costa below ocellus, the sulci between face and cheeks, and 

 the genicular lunula? of hind femora black ; pronotal carina? and greater portion of lateral lobes piceous ; 

 a narrow stripe on each side of the face, together with the immediate border of the sides of the 

 pronotum, dirty white; abdomen largely dark vinaceous-brown above, pale beneath, the dorsum at each 

 side of the middle marked with a series of prominent, quadrate, whitish patches, one to each segment. 

 Lower sulcus of hind femora testaceous. Antenna? pale, darker apically. 



Length of body, <$ 40, $ 44 ; of pronotum, 6 15*5, § 18; of tegmina, <$ 9, $ 6-5; of hind femora, 6 26, 

 2 20 millim. 



Eab. Mexico, Tepic (Gustav Eisen, coll. Calif. Acad. Sci. : 1 <3 , 1 $ ). 



This species is dedicated to its collector, who has done much towards bringing to 

 light many interesting west-coast Mexican insects, 



[TYTTHOTYLE, Scudder, 



Thrincus, Bruner, Proc. U.S. Nat. Mus. xii. p. 79 (1890) (part.). 

 Tytthotyle, Scudder, Canad. Ent. xxix. p. 74 (1897). 



Like several other North-American (Edipodine genera, this monotypic genus is 

 confined to the region along the international border between the United States 

 and Mexico, 



