1921] NATURAL SCIENCES OF PHILADELPHIA. 227 



termed "A," than with type "B," the latter the characteristic 

 armament for the other species of NeoblatteUa. 



We do not feel warranted in considering this species generically 

 distinct solely on this condition; in numerous other characters 

 janeirae shows much closer affinity to the Conspersa Group than 

 to the genotypic Adspersicollis and other Groups of the genus. 



The very narrow interocular space and symmetrically highly 

 specialized male subgenital plate constitute particularly distinctive 

 features. The proportionately decided amplitude of the organs 

 of flight is only exceeded in males of N. carrikeri Hebard, of the 

 species at hand. 



Though simply and not strikingly colored, this is one of the most 

 interesting species of the genus, due to the unusual armament of 

 the cephalic femora and remarkable specialization of the male 

 supra-anal plate. 



Type: cf ; Tijuca, Rio de Janeiro, Brazil. Elevation 500 to 1000 

 meters. ]May. [Paris Museum.] 



Size medium for the genus, form moderately slender. Inter- 

 ocular space comparatively narrow, one-third that between the 

 antennal' sockets. Ocellar spots distinct, their surfaces oblique 

 to, but rounding smoothly into, the flattened inter-ocular-ocellar 

 area. Maxillary palpi elongate. Pronotum Avith surface very 

 weakly convex, greatest width distinctly caudad of median point, 

 caudal margin showing an exceedingly broad and rounded, feeble 

 obtuse-angulate production. Tegmina delicate and elongate with 

 (10 sinistral, 11 dextral) longitudinal discoidal sectors; cross-veinlets 

 distinct, particularly in distal portion, where they are darkened. 

 Wings with mediastine vein and (7) proximal costal veins showing 

 elongate thickened distal portions, ulnar vein with (6)*^ complete 

 branches, intercalated triangle w^ell developed, its width over one- 

 half its length. Dorsal surface of abdomen without distinct 

 specialization, but wdth meso-caudal section of sixth tergite sub- 

 chitinous in an irregularly triangular area, extending over half 

 the distance to base of the tergite, the sides of which area are con- 

 cave. Supra-anal plate two-flfths as long as basal width, very 

 bluntly triangularly produced, with apex broadly sub-bilobate and 

 lateral margins showing very broad and feeble concavity opposite 

 the cereal bases. Concealed genitalia hidden. Subgenital plate 

 ample, symmetrical, very deeply cleft on each side, the lateral por- 

 tions thus separated, nearly vertical, elongate and very slenderly 

 triangular plates curling outward to their blunt, rounded apices, 

 which extend slightly further caudad than the median production 



^■- Two of these branches again divide in the type. 



