312 AMERICAN PSYCHODID.E. 



rather acutely angulated at tip of median vein; radial furcation slightly nearer 

 tip than cubital, about two-thirds length of wing from tip in the male. Female 

 wing rather densely clothed with black and dark brown, variegated with white 

 and yellow hair; fringes appear lighter; anterior denser, but less erect than pos- 

 terior; costa with a dense basal patch of brown; beyond this a large patch of 

 black ; tips of veins 1-2 with small patch of yellowish-white hairs and the fringe 

 from tip of third vein to the apex of wing of the same color ; tip of wing black ; 

 posterior fringe with small yellowish-white patches at tips of veins 6-7-8-9 and 

 just behind the tip of vein 10; entad to the radial furcation is a patch of erect, 

 bright yellow, flat hairs, bordered in front and behind with small patches of 

 similar white hairs; behind the furcation on the anterior branch is a small snowy 

 patch, followed by a small black patch, which is followed by a second yellow 

 tuft, and this in turn is bordered behind by a second snowy tuft; behind the 

 furcation on the posterior branch is a large tuft of black hair; ectad to the cubi- 

 tal furcation on the posterior branch is a small patcli of white, bordered behind 

 by black ; there is a more or less distinct transverse band of white about on a 

 line from tips of veins 1 and 9; white at base of veins much less distinct than in 

 males. In the males the patches at tips of veins more distinct and snow white; 

 transverse band of white less distinct; base of all the veins white; costa black 

 at base, followed by large white patch ; anterior fringe much darker than in 

 females, which is also true of the whole wing vestiture. Antenuse 16-iointed, 2 

 ram. long ; basal segments about equal ; scales on first principally black, on second 

 white; segments 3-16 with basal enlargements and long slender pedicles; pedicles 

 about uniform in length, much longer than nodes; nodes and pedicles brownish- 

 yellow ; nodes with whorls of snow-white hair, which are more erect in the 

 males, giving the antennae a heavier appearance; terminal spike of sixteenth 

 segment slightly constricted in the middle but expanded toward the apex, bear- 

 ing very short light hairs. Ovipositor yellowish, .3 mm. long, almost straight. 

 Ventral plate yellow ; a third broader than long; breadth .2 mm. ; broadly trun- 

 cate at base, constricted toward the middle and slightly expanded toward apex, 

 which is broadly emarginate. Inferior pair of male genitalia prominent; .5 mm. 

 in length ; expanded toward base; quite densely clothed with long, gray, knotted 

 hair over half way to tip, where they are suddenly constricted; terminal con- 

 stricted portion bearing ten or twelve strong, erect, flat tenticles ; basis of inferior 

 pair of genitalia strongly developed, broad at apex, with median projection, 

 tai)ering toward base; shorter than the genitalia; superior pair strong, 2-jointed, 

 about equal the length of inferior; basal segment quite strong; only sparingly 

 clothed with hair; second segment tapering rapidly from slightly expanded base 

 to acute tip, which is hooked downward. The side view of the genitalia shows 

 how the basis can be mistaken for a basal segment of the inferior appendages. 

 Intromittent organ strongly developed; .25 mm. long and broader than deep; 

 club shaped, with an oval-shaped opening on the dorsal surface; depressed toward 

 tip. The hair covering thorax, abdomen and male genitalia knotted ; in some 

 cases a single hair will have as many as three or four enlargements. The writer 

 found knotted hair on none of his other specimens. 



Hah. — Galveston, Texas. Three males and three females from the 

 Kansas Univ. collection. Collected by Prof. F. H. Snow, in May. 



Readily distinguished by large size; color patterns of wings; 

 snow-white antennae and knotted hair. 



