ART. 25 INSECTS OF ORDER TRICHOPTERA — MARTYNOV 7 



of species denticulata^ longispina, and siTnilis of Ulmer, though 

 representing a very distinct species. 



Type.—K?i\Q., U.S.N.M. No. 43154. 



Specirnens examined. — Two males, from Khow Sai, Trong, Lower 

 Siam, January-February, 1899. 



Family HYDROPSYCHIDAE 

 Genus MACRONEMA Pictet 



MACRONEMA FASTOSUM Walker 



The specimen examined belongs to the color variety of Macronema 

 fastosum var. fasciatu/ni Albarda; apical portion of the anterior 

 wing, behind anastomosis, is of the same dark-yellow color as its 

 basal portion ; fuscous stripe somewhat dilated anteriorly. 



SpeciTTiens examined. — One male, from Khow Sai, Dow (1,000 

 feet), Trong, Lower Siam, January-February, 1899. 



Genus HYDROPSYCHE Pictet 



HYDROPSYCHE APPENDICULARIS. new species 



Plate 2, Figures 16 tx) 18 



Description. — Head brownish, clothed with golden-brownish hairs. 

 Thorax brownish ; anterior legs brownish, median and posterior ones 

 paler, yellowish; in the females the tibia and tarsus of the median 

 legs are dilated, but not very strongly; anterior legs slender, feeble. 

 Anterior wings pale brownish, irrorated with numerous, partly con- 

 fluent, hyaline spots, so they may be called pale yellowish, reticulated 

 with brownish; pale spots clothed with golden-yellow hairs. Pos- 

 terior wings pale; median cell closed. Fringe of the apical margin 

 of anterior wings yellowish with blackish interruptions. Abdo- 

 men brownish above, paler beneath. Male: Ninth tergite with a 

 short triangular median projection, the dorsal plate (tenth segment) 

 forming two pairs of short posterior projections; the upper pro- 

 jections are subtriangular, rounded dorsally, slender from side, bear- 

 ing short hairs at their ends. Lower projections shorter but broader 

 and rounded; at their outer edge they form two very long slender 

 processes, nearly reaching the ends of the inferior appendages; 

 viewed laterally they are curved upward, then downward and back- 

 ward. Basal joint of the inferior appendages long and somewhat 

 thickened in their apical portions; second joint short, slender, curved 

 inward. From the apical portion of the penis arises, beneath, a 

 rather long lobe, which by a deep excision is divided into two nar- 



