4 PROCEEDINGS OF THE NATIONAL MUSEUM vol.68 



erect on the shoulder itself; sternopleura with three bristles placed 

 in a triangle, but no other pleural bristles. Scutellum with 4 margi- 

 nal bristles, bare on the disk and at border. 



Abdomen cylindroconical, in both sexes with 5 visible segments, 

 the genital ones not counted. Tergites and sternites not always 

 differentiated, the membrane sometimes running uninterrupted 

 around the abdomen ; there are no true bristles, but the tergites have 

 long bristly hairs at hind border and sides; even the lateral mem- 

 brane of the middle segments is clothed with short, thick set'ulae. 

 Male hypopygium open, but of rather small size and narrow, not 

 broader than the last abdominal segment. Female ovipositor thick; 

 the basal segment (the only one visible) as long as the two last 

 abdominal segments together, but more narrow; terminal lamellae 

 small and pubescent; a strong projecting spine below. 



Legs rather slender, femora not thickened, quite simple in both the 

 sexes; femora and tibiae with short bristly hairs, the latter with 

 only one preapical hair, tarsi of the hind pair with the basal joint 

 considerably thickened but not much shorter than the following 

 joint; claws short, curved, simple; pulvilli short. 



Wings (fig. 1) rather long and narrow, parallel-sided, with 

 smooth, unspotted membrane. Costa extending to the end of fourth 

 vein, with short ciliation and with minute setulae on the 2 basal seg- 

 ments; an isolated rather long bristle near the extreme base. Aux- 

 iliary vein free, extended to a little beyond middle of first vein and 

 ending very close to it; humeral crossvein rather thick. Fir.st vein 

 short, meeting the costa before the first third of anterior wing border, 

 and considerably before the small crossvein. Second vein long and 

 rather straight, upcurved at end, the third segment of costa being 

 less than one-third of the length of the second. Third vein rather 

 straight but distinctly curved down at end, ending precisely at wing 

 tip. Small crossvein short and perpendicular, placed a little before 

 the first third of the discoiclal cell. Fourth vein straight, its last 

 section being not much longer than the half of the preceding sec- 

 tion. Fifth vein toward the end cui-ved up in a I'ounded bend 

 very near hind border of wing, and thus forming the hind crossvein, 

 which is placed perpendicularly and parallel with the small one. 

 Sixth vein straight, much longer than in allied forms, completely 

 chitinized throughout its whole length, but ending considerably 

 before hind border of wing. Anal crossvein inwardly oblique, meet- 

 ing at fifth vein in one point or nearly so with the middle basal cross- 

 vein, the anal and second basal cells being thus of about the same 

 length. Auxiliary lobe broad, alula rather rectangular, both with 

 long, soft ciliation at border. 



Genotype. — Pycnopota ?nanni, new species. 



