354 Annals Entomological Society of America [Vol. V, 
to be an appendage to the 9th sternite, a semi-lunar, feebly-chitinized 
piece (z) flattened and the tip slightly 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 rounded, chitinized 
organ (b) produced caudad into a long spine; it is black, very conspic- 
uous, occupying the niche between the 9th sternite and tergite, its 
rounded 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 slightly caudad, the tips touch- 
ing, the cephalic margin densely clothed with 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 ventrad; 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). 
2 Similar to the o, but antennz much shorter, segments 1—5, 
yellow; abdomen, segments 1—2 yellow with lateral margin of tergum 
black; segments 2—6, black, yellowish in the middle of the lateral 
margin of tergites; 7—S8 black; 9 yellow. Sternites 4—6 distended with 
eggs; shoved out of the tergal covering, black with a yellow wash. 
Genitalia: 9th tergite about as long as the Sth, 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 sternite 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 sternite very long. (See Figs. s, s1). 
Holotype, @, San 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. “‘The Aymaras, 
who constitute the chief ethnical element of the Bolivian 
nation, are in almost 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. 
