352 Annals Entomological Society of America [Vol. V, 



deeply incurv'cd, dusky, giving an indistinct lateral stripe. Hypo- 

 pygium: (Fig. 1); Sth tergite, (St), moderately long, its caudal margin 

 almost straight, its caudal margin very feebly concave medially; Sth 

 stemitc, (8s) short and high, only about two-thirds as long as the 7th 

 stcmite, but very high at its base ; viewed from the side, triangular, its 

 tip turned dorsad and clothed with long hairs; 9th tergite (9t) broad, 

 viewed from above, much broader than the Sth tergite, swollen basally, 

 the caudal margin broadly concave, in the middle, feebly convex and 

 here ^vith a minute square median notch (Fig. 1,); viewed from the 

 side (1) the 9th tergite is truncated at its tip and broadly notched, its 

 ventral-caudal margin gently concave; the suture separating the 9th 

 tergite and stemite not complete. 9th stemite, viewed from the side 

 (1, 9s), its dorsal margin about straight attached to the tergite on its 

 cephalic or anterior portion; its caudal margin about straight; along its 

 caudal face, an elongate body (y), convex outerly; its ventral margin 

 ajiplicd to the caudal prolongation of the ventral face of the 9th stcmite; 

 at its dorsal end it is ]:)roduced into a fleshy, feebly chitinized body (a), 

 densely covered with pale hairs which arc longest apically ; viewed from 

 the side, it is slender with a btmip on the middle on its outer face. 

 Proximad of this organ, in the notch of the ventral paired organ on the 

 9th stemite, is an elongate, slender organ (b) directed dorsad; its base 

 is sliglitly enlarged, its stem very slender with long pale hairs on its 

 inner face, these directed toward the median line; the tips of these 

 organs are greatly produced on the proximal side, here sub-chitinous, the 

 tip chitinized, black. In a position of rest, the inner edge of this organ is 

 closely applied to its fellow at the median line; the caudal face of this 

 broad expansion is provided with three or four transverse ridges and its 

 A>-entral margin is fringed with long pale hairs; viewed from above this 

 organ resembles Fig. h; the outer tooth most chitinized, black; the 

 inner, less chitinized except on its outer margin ; recurved at the tij) and 

 directed cephalo-ventrad. Viewed from beneath, the 9th stemite has 

 the caudal margin concave, a pair of elongate median organs directed 

 caudad, these organs (c) slender, swollen at their tips, the tips closely 

 applied, densely clothed with appressed, pale hairs. 



Holotype, cf , Callanga, Peru. (Rec'v'd from Staudinger- 

 Bang-Haas). 



Type in author's collection. 



The specific name is derived from the great Indian nation 

 formerly inhabiting Peru. 



Closest related, apparently, to glaphyroplera Phil.; sub- 

 andina Phil., and apterogyne Phil., of Chile in the greyish color. 

 I have before me specimens of all of the above, excepting 

 glaphyroplera, which differs widely from inca in antennal and 

 wing characters. 



