EEPOET ON A COLLECTION OF INSECTS OF THE OKDER 

 TRICHOPTERA FROM SIAM AND CHINA 



By A. B. Martynov 



Zoological Museum, Academy of Sciences, Leningrad, U. S. S. R. 



The trichopterous fauna of Szechwan is a very interesting and 

 apparently very rich one. Nearly all the species found proved to 

 be new. It is not a typically Chinese fauna, but resembles more 

 that of the eastern Himalayas and of Tibet. 



The material herein described is all in the United States National 

 Museum. The Chinese portion was collected by Dr. D. C. Graham, 

 of Suifu, Szechwan Province, China, while the Siamese specimens 

 were taken by Dr. W. L. Abbott. 



Family RHYACOPHILIDAE 



Genus RHYACOPHILA Pictet 



RHYACOPHILA SINENSIS, new species 



Plate 1. Figures 1, 2 



Description. — Head and thorax brown. Anterior femora brown- 

 ish, median and posterior ones yellowish ; anterior and median tibiae 

 brown, with yellow markings; posterior tibiae yellowish; tarsi 

 brownish. Abdomen brownish, yellowish beneath. Anterior wings 

 brownish, with indistinct pale reticulation; second apical fork a 

 little basad of the first. Posterior wings subhyaline, pterostigma 

 opaque; second apical fork beginning clearly earlier than the first 

 one. Male: Ninth tergite with a long, narrow median process, 

 which is directed downward and somewhat dilated at its apex. The 

 hind margin of the ninth tergite at the sides of the median process 

 is blackish and forms two small projections directed backward. 

 Inferior appendages^ brownish; the basal joint, viewed laterally, 

 is broad ; second joint subdivided by a broad triangular excision into 

 two lobes, the upper one broad, subtri angular, the lower one of the 



' I use this term for pedes genitales of autliors. 



No. 2891.— Proceedings U. S. National Museum. Vol. 79, Art. 25. 

 66630—31 1 1 



