300 BRAZILIAN ORTHOPTERA 



Sitalces madeirensis new species (Plate XV, fig. 41.) 



A very peculiar species, which can be immediately recognized 

 from the others of the genus by the completely developed tegmina 

 and wings. 



Type. — 9 ; Porto Velho, Rio Madeira, Brazil. (Stanford 

 Expedition; Mann and Baker.) [Acad. Nat. Sci. Phila., Type 

 no. 5289.] 



Size small: surface smooth, except for the regularly punctate metazona of 

 the pronotum and irregularly rugoso-punctate remaining section of the lateral 

 lobes and faintly punctate pleura. Head with the dorsal line moderately 

 declivent from the rounded occiput to the apex of the fastigium; vertex with 

 the interspace between the eyes very narrow, not more than one-half that of 

 the interocular portion of the frontal costa, very narrowly sulcate; fastigiiun 

 slightly transverse, trigonal, apex narrowly arcuato-truncate, surface strongly 

 excavate mesad; fastigio-facial angle obtuse, the interantennal region vertical, 

 truncate when seen from the lateral aspect, facial line ventrad of the angle 

 moderately retreating: frontal costa at fastigio-facial angle moderateh' wider 

 than the interocular space of the vertex, between the antennae expanding to 

 twice as wide as the ocular interspace then narrowing -to the dorsal width, 

 thence ventrad subequal in width until it become subobsolete immediately 

 dorsad of the clypeal suture, interocular space plane, biseriate punctate, sul- 

 cate for about two-thirds of its length ventrad of the ocellus; supplementary 

 facial carinae decided, moderately and regularly diverging ventrad, a narrow 

 area ventro-cephalad of eye and involving the supplementary carinae callose; 

 eyes moderately prominent, broad-ovate in basal outline, about one and one- 

 third times as long as the infra-ocular portion of the genae; antennae filiform, 

 short, about twice as long as the pronotum. Pronotum sellate, slightly but 

 appreciably narrowed mesad, the dorsal line appreciably concave, cephalic 

 section subequal in width to the inserted portion of the head; disk with the 

 greatest caudal width contained one and one-fifth times in the greatest length 

 of the same: cephalic margin of the disk considerably produced, bisarcuate, 

 the median dividing emargination very broad and relatively shallow; caudal 

 margin of disk arcuato-truncate with a decided broad V-shaped median emar- 

 gination; median carina broad but low, continuous but decidedly severed by 

 all the transverse sulci except the cephalic one; transverse sulci broad, pro- 

 nounced, decidedly impressed, the cephalic one weaker, the second sulcus not 

 continuous over the lateral lobes as is the case with the others, metazona com- 

 prising one-third of the dorsal length of the pronotum: lateral lobes with the 

 greatest depth equal to two-thirds of the greatest dorsal length of the same, 

 cephalic margin of lobes oblique, faintly sigmoid, ventro-cephalic angle sub- 

 rectangulate, ventral margin quadrantiform-emarginate, median angle rounded 

 sub-rectangulate, caudal section of ventral margin sinuato-truncate, weakly 

 ascending dorso-caudad, ventro-caudal angle rounded sub-rectangulate. Teg- 

 mina surpassing the tips of the caudal femora by nearly the i)ronotal length, 

 sublanceolate: costal margui with shallow, very elongate ])roximal lobe, distal 

 portion of the same margin rather strongly arcuate to the narrowly rounded 

 apex, which is nearer the sutural margin: venation rather sparse, somewhat 



