1921] NATURAL SCIENCES OF PHILADELPHIA. 275 



page 276, differing signally only in the male genitalic specialization. 



Type: cf ; Carcarana, Santa Fe, Argentina. (Hebard Collection, 

 Type no. 752.] 



Size small, form moderately slender. Interocular space, ocellar 

 areas, maxillary palpi, intercalated triangle of wings, dorsal surface 

 of abdomen, titillator, armament of limbs, pulvilli, tarsal claws and 

 arolia as described for icano. Latero-caudal sulci of pronotal disk 

 moderately decided. Tegmina and wings fully developed, extend- 

 ing considerably beyond the cereal apices. Supra-anal plate sym- 

 metrical, two-fifths as long as basal width, brief lateral margins 

 nearly straight and almost transverse to within cereal bases, the 

 remaining produced portion symmetrically trapezoidal with angles 

 broadly rounded, its surface broadlj^ convex, weakly chitinous meso- 

 distad, the latero-caudal angles thickened and well-supplied on 

 their ventral surfaces with spiniform hairs directed cephalad, the 

 dextral margin of this production mesad produced ventrad in a 

 large, rounded lobe, its caudal margin also supplied with spiniform 

 hairs directed meso-caudad. Within the anal chamber the socket 

 of the sinistral cercus is produced mesad in a minute conical pro- 

 jection; adjacent to the dextral cercus the corresponding section 

 is produced in a slender finger, which is directed mesad and then 

 curves, with considerable angulation, ventrad, its apex armed with 

 a few very minute spines. Paired plates beneath supra-anal plate 

 developed into large lobes, the sinistral plate extending two-thirds 

 the distance to the dextral cercus but more irregular and not as 

 strongly or evenly swollen as in icano. Subgenital plate with sur- 

 face supplied rather heavily with microscopic hairs, strongly convex, 

 free margin thickened sinistro-proximad and lying just outside the 

 sinistral cereal base, briefly inbent dextro-proximad beneath the 

 dextral cercus, sinistral margin very broadly concave and showing 

 very weak obliquity to the dextral style, which is situated a brief 

 distance mesad of the cercus, dextral margin broadly convex to 

 dextral style, where it forms an acute angulation, being very briefly- 

 directed caudad to base of the style. Dextral style heavy, curving 

 sinistrad from its thickened base, two and one-half times as long as 

 its basal width, tapering to its blunt apex, with entire dorsal sur- 

 face thickly supplied with minute spines. Sinistral style on sinistral 

 margin a distance equal to its basal width from dextral style, taper- 

 ing and curved weakly dextrad beyond its slightly thickened base, 

 only slightly shorter but decidedly less heavy than dextral style 

 and unarmed. ^"^ 



Allotype: 9 ; same data as type. [Hebard Collection.] 



Agrees closely with male in all ambisexual characters, differing 

 in the following respects. Head slightly broader, the interocular 



^°* Compared with icano, the marginal contour of the subgenital plate at the 

 styles and their general structure is found to be verj' similar. In saussurei the 

 styles are appreciably heavier. 



