ART. 25 INSECTS OF ORDER TRICHOPTERA MARTYNOV 5 



tion. Legs yellow; anterior and median legs somewhat reddish, 

 with broad, dark-brown markings. Anterior wings with dark- 

 brown reticulation, forming sometimes two large, distinct, brown 

 spots — one in the middle of the wing, the other nearer to the base. 

 In the specimen from Suifu the basal portion of the wings is also 

 dark brown. Apical portion triangular, but not extended. Hind 

 wings pale, whitish, with apical portion somewhat fumose. Male: 

 Lateral portions of the ninth segment large, broad, triangular, pos- 

 teriorly extended, forming two fingerlike hairy processes. Tenth 

 segment transverse, shorter than in S. navasi Ulmer. Its median 

 portion forms a distinct elevation above; seen from above, it is 

 triangular at its base, but narrow in its distal part. The apical 

 portion of this elevation is surrounded by a yellow platelike struc- 

 ture, forming a median tonguelike process, not very long. Lateral 

 portions of the tenth segment broad, above, posteriorly with two 

 pairs of short processes, one pair near the median tongue-shaped 

 process, the other one at the middle of the hind margin; hind outer 

 portions somewhat tuberculated, with several bristles. Upper por- 

 tions of the inferior appendages long, straight in their basal portions 

 (behind the tenth segment, above), then curved outward; apical 

 portions somewhat thickened and forming, externally, two short 

 prominences or processes, somewhat varying in length. Lower por- 

 tions of the inferior processes also rather long; seen from beneath 

 they are narrow, with apical margin obliquely truncate. Preanal 

 appendages long, hairy, as usual. Penis with two minute acute 

 appendages at its apex. Length of body, 18 to 20 mm.; expanse, 

 55 to 61 mm. 



This species, doubtless, is allied to S. rtavasi Ulmer (Tient-Tsuen, 

 in Shantung). The tenth segment is formed on the same plan, but 

 its median portion in navasi is extended backward much more than 

 in grahami. Upper portions of the inferior appendages in 7iava^i 

 shorter, strongly curved outward, knee-shaped, if seen from above. 



ry;?e.— Male, U.S.N.M. No. 43153. 



Specimens examined. — Two females and one male, from Shin Kai 

 Si, Mount Omei, Szechwan; one female, same locality (4,400 feet), 

 July 1-14, 1921; one male, same locality, July 17, 1922; one female, 

 same locality (6,000 to 7,500 feet), August 21, 1921; one male, same 

 locality (5,000 to 11,000 feet), August 24r-27, 1921; one female, Suifu, 

 Szechwan, September 6 to October, 1921. 



STENOPSYCHE SIAMENSIS, new species 



Plate 2, Figuees 14, 15 



Description. — Body reddish brown. Head reddish, with reddish- 

 yellow antennae; ocelli distinct. Legs reddish yellow, anterior and 



