1920.] NATURAL SCIENCES OF PHILADELPHIA. 259 



Type. — cf ; Rio de Janeiro, Brazil. November. (H.H.Smith.) 

 [United States National Museum.] 



Size medium: form moderately compressed. Head with the occi- 

 put moderately arcuate in transverse section, not at all declivent 

 cephalad; fastigium moderately compressed, faintly elevated and 

 slightly enlarged distad, sulcate dorsad, the lateral margins of the 

 dorsal surface faintly elevated proximad, cephalic face of the fas- 

 tigiimi cuneate, weakly excavate, well separated from the acuminate 

 frontal fastigium: palpi very elongate, extremely slender, the distal 

 joint moderately arcuate distad; eyes prominent, semiglobose, in. 

 basal outline circular: antennae incomplete in the type, proximal 

 joint large. Pronotum with the greatest caudal width of the disk 

 contained one and two-thirds times in the length of the same, the sur- 

 face of the disk moderately arcuate in transverse section cephalad 

 deplanate caudad, lateral angles weakly indicated caudad ; cephalic 

 margin of disk faintly arcuato-emarginate, caudal margin moderately 

 arcuate; an impressed figure, in the form of a broad W, placed 

 slightly caudad of the middle of the disk: lateral lobes of the pro- 

 notum slightly longer than deep; cephalic margin of lobes arcuato- 

 sinuate, ventro-cephalic angle obtusely rounded, ventral margin, 

 ventro-caudal angle and caudal margins broadly arcuate, regularly 

 passing from the ventro-cephalic angle to the humeral sinus, the 

 latter distinct but not deeply indicated, obtuse-angulate. Tegmina 

 elongate lanceolate, surpassing the apex of the abdomen by more- 

 than twice the length of the head and pronotum combined; greatest 

 width of tegmen contained four and one-half times in the length of 

 the same, greatest width of the marginal field at the proximal third 

 of the tegmen and there forming two-fifths of the entire tegminal 

 width; costal margin in general very weakly arcuate, very briefly 

 sharp arcuate proximad, distad regularly and decidedly arcuate to 

 the relatively narrow, but well rounded apex; sutural margin nearly 

 straight, moderately distad to the apex; marginal field irregularly 

 areolate, with about six or seven oblique, irregular rami of the 

 humeral vein, which are poorly dominant in the general areolation 

 of the field; median vein diverging from the discoidal very faintly 

 proximad of the middle of the tegmen, bifurcate, with the rami 

 reaching the sutural margin; ulnar vein markedly undulate, without 

 appreciable rami; discoidal field very closely and finely areolate, 

 these slightly larger distad, in the proximal half of the area betweeri 

 the discoidal and ulnar veins are placed a series of six to seven low 

 nodes in the reticulate areolation: stridulating field relatively nar- 



