LEONARD HASEMAN, 307 



jointed ; basal joints much stronger than the succeeding ones; first longer than 

 broad; second globular; 3-15 with basal enlargements; joint 16 spherical ; 16-17 

 closely joined ; 17 with terminal spike; pedicles of 3-6 longest, one-third longer 

 than their nodes; nodes 8, 12 and 17 with whorls of snow-white hair, while other 

 nodes are clothed with whorls varying from gray to slaty -black; whorls 3-6 

 having a light cast in reflected light but not snowy, as 8, 12 and 17; segments 

 1-2 rather sparingly clothed with dark scales; nodes and pedicles dark brown. 

 Length of wings 2-2.3 mm.; breadth .85-1 mm.; broadly rounded midway be- 

 tween the simple veins; bifurcations even, midway between the base and tip; 

 wings densely clothed with white, black and brown hair; fringes rather heavy; 

 posterior about one-fourth the breadth of wing, varying from brown to black, 

 with a small patch of white at the tip of each vein, and a small white costal 

 patch in front of the tip of the first vein ; also a basal patch on costa and a more 

 distinct basal patch on the posterior margin; tuft of long, bristling hairs of a 

 yellowish cast commingled with the basal patch on costa; white patches occupy- 

 ing about as much of the fringe as the darker patches ; wings transversely banded 

 with black as follows: An interrupted but distinct band extending from midway 

 between the tips of veins 1-2 to midway between 8-9; a less distinct parallel 

 band extending from a point between the tips of veins 9-10 to the costal margin 

 just in front of the tip of vein 1; midway between this and the bifurcations a 

 still less distinct band ; on a level with the bifurcations a very distinct band, and 

 between this and the base of the wing two less distinct bands. These black 

 bands are formed by erect tufts of flattened black hairs on the veins. Between 

 these black bands the hair is largely white, giving the wings a distinct banded 

 appearance. Male genitalia very short, hidden beneath the hairs of the poste- 

 rior end of the abdomen. Ovipositor strong, a little longer than plate, acute at 

 tip, slightly curved. Ventral plate longer than broad, tapering from an expanded 

 base to tip, which has a shallow emargination ; yellow at tip, black toward base ; 

 about one-fifth mm. long. 



Readily distinguished by banded antenuie and wing markings. 



Hah. — Columbia, Missouri. Five specimens taken on laboratory 

 window and at light, September 18 to November 9, 1906. 



Pericoina scala n. sp. 



Body yellowish-brown, clothed with grayish-black hair, which to the unaided 

 eye gives the insect a black appearance, but which, under magnification, appears 

 lighter. Legs dark brown to black, clothed with dark hairs and scales; tarsi 

 covered with light scales, which appear white in reflected light. Wings broadly 

 rounded, apex about midway between sim pie nervures ; length of wing 2.1 mm. ; 

 breadth .85 mm.; uniformly clothed with smoky gray hair ; bifurcations even, 

 1 mm. from base of wing; hairs of posterior fringe longer and more erect than 

 of anterior; length of former .35 mm., of latter .25 mm. ; under surface of wings 

 densely clothed with brownish-black scales from the base to the bifurcations, 

 which give the base of the wings a conspicuous black appearance; beyond the 

 scales is a narrow band of flat hairs, which give way to ordinary hairs distally. 

 Antennte 16-joiuted ; length 1.15 mm.; basal joint strong, cylindrical; second 

 joint smaller than first, spherical; 3-15 with basal enlargements, about equal in 

 length to the strong pedicles; 16 closely joined to 15, spherical, with short termi- 



TEANS. AM. ENT. SOC. XXXIII. SEPTEMBER, 1907. 



