354 Annals Entomological Society of America [Vol. V, 



to be an appendage to the 9th stcmite, a semi-lunar, feebly-chitinized 

 piece (z) flattened and the tip sHghtly expanded, bearing a fringe of 

 long pale hairs on its proximal margin, these projecting inward; at the 

 tip, the hairs become very stout, bristle-like, black, and the organ ends 

 in two or three chitinized teeth which are directed dorsad and slightly 

 outward; underneath the tip of this appendage is a roimded, chitinized 

 organ (b) produced caudad into a long spine; it is black, very conspic- 

 uous, occupjdng the niche between the 9th stemite and tergite, its 

 roimded face directed outward through the niche. 9th tergite (9t), 

 rectangular, its sides square, its caudal angles almost right; on the 

 caudal margin, a broad median lobe, very obtuse and enlarged at the 

 apex, black and very densely clothed with short hairs; the very con- 

 spicuous lobe is concave at its tip, projects caudad, the tip very slightly 

 ventrad. Apical appendages, from the genital chamber: dorsal lying, 

 on either side of the median line, an elongate-triangular organ (w) 

 broad at the base, directed dorsad and sHghtly caudad, the tips touch- 

 ing, the cephalic margin densely clothed wdth pale hairs; the opening 

 between them (looking into the genital chamber) is elongate-oval and 

 in it is a perforate membrane through which the penis is probably 

 exserted. The ventral lying appendage (a) viewed from the side, roughly 

 triangular, one angle directed caudad, another \-cntrad; caudal face 

 gently concave; the whole organ densely clothed with long pale hairs, 

 longest on the dorsal margin; viewed from above, it is seen that the 

 dorsal edge is thickened, narrowing to the sharp ventral margin 

 (Fig. m, a). 



9 Similar to the cf , but antennae much shorter, segments 1 — 5, 

 yellow; abdomen, segments 1 — 2 yellow with lateral margin of tergum 

 black; segments 2 — 6, black, yellowsh in the middle of the lateral 

 margin of tcrgites; 7 — S black; 9 yellow. Stemites 4 — 6 distended with 

 eggs; shoved out of the tergal covering, black with a yellow wash. 

 Genitalia: 9th tergite about as long as the 8th, its caudal margin 

 broadly impressed medially ; appendage to the 9th tergite broad basally, 

 sub-shining, ending in a blunt lobe, its tip rounded, deeply notched, the 

 lobes fringed on the inner edge with short pale hairs. From beneath, 

 the 9th stemite is very long, its caudal margin deeply notched, the 

 valves projecting from the middle of this notch, the lateral margins 

 lobed and bent inward; 9th stemite very long. (See Figs, s, Si). 



Holotype, d', vSan Antonio, Bolivia (Recv'd from Staudinger- 

 Bang-Haas). 



Allotype, 9 , with the type. 



Types in author's collection. 



The specific name is that of a native tribe. "TheAymaras, 

 who constitute the chief ethnical element of the Bolivian 

 nation, are in almo.st exclusive possession of the plateau regions 

 and their domain also encroaches northward on Peruvian 

 territory. The true center of the race lies in the islands, head- 

 lands and shores of Lake Titicaca. " Reclus, Universal Geogra- 

 phy, Vol. XVIII, p. 368. 



