110 Needham New Genera and Species of Perlidae. 



Abdomen blackish, with rather short setae that do not surpass the wing 

 tips, and that are clad with tawny pubescence. The 8th ventral segment 

 of the female is prolonged posteriorly in a broad almost sacculately-innated 

 lamina which covers the 9th segment, and whose margin is upcurved and 

 obtusely rounded. 



A single female specimen: Hikosan, Buzen, Japan, 28 Apr., 1902. 



Nemoura japonica sp. nov. 



Length to wing tips, 10.5 to 11.5 mm.; antennae, 9 mm.; expanse of 

 wings, 22 mm. 



Color nearly uniform blackish, including the antennae, the antennal 

 sclerite, basal segments of palpi, and bases of femora and all of coxae, 

 somewhat paler. Antennae finely and uniformly pubescent, about 40- 

 jointed; three terminal segments of the maxillary palpi of equal length. 



The prothorax is distinctly wider than long, broadly rounded at the 

 sides, slightly rounded in front, straight or slightly concave behind, with 

 all its angles very obtuse. 



The wings are dusky hyaline, with a faint cloud extending backward 

 from the stigma. 



Two specimens, apparently male and female (in both the abdomen is 

 greatly contracted and bent upon itself), from Hikosan, Buzen, Japan, 

 collected on the 23d of April, 1902. 



Taeniopteryx tenuis sp. nov. 



Length to tip of wings, 12 to 13 mm.; antennae, 1.1 mm. additional ; ex 

 panse of wings, 24 mm. 



Color brownish, paler beneath and on all appendages. Head rufous 

 above and on the enlarged basal segment of the antenna. The transverse 

 occipital margin is somewhat tumid, and is marked with fine longitudinal 

 scars; palpi fuscous. 



Prothorax quadrangular, slightly wider than long, and slightly widened 

 posteriorly, with obtuse angles. 



Wings narrow and long, smoky hyaline, with an obscure white mark 

 just before the radio-medial crossvein, between the subcostal and cubital 

 veins, and a smaller mark beyond this crossvein. Legs pale, clad with 

 close brown pubescence, sutures, and tips of tarsi, darker ; first and second 

 tarsal segments of equal length, the third segment one-fourth longer. 



Abdomen cylindric; 9th segment of the male elongated and upcurved 

 in a large spoon-shaped plate which extends beyond the tip of the 

 abdomen by the length of several segments, and is yellow, clothed exter 

 nally with brown pubescence; from within its apex arises an erect appen 

 dage, shaped like a bird's head with the beak extending forward above 

 the terminal abdominal segments in a long triangular point. 



