Three New Species of Trichosiphum in Formosa, 



Moichiro Maki, 

 Assistant Entomologist of the Agricultural Experiment 

 Station, Goverment of Formosa. Dec. 1916. 



The described species of this genus from the world now amount only 

 to seven, including three new species described in this paper and a doubt 

 -ful species from Ceylon*. The genus Trichosvphum Pergande, 1906, 

 is only found in Japan, Formosa and Ceylon*, not in any other coun- 

 tries up to the present. The author has made a following key for 

 determination of all the species of this genus excepting of articarpi 

 Westwood, but as Japanese (proper) species are known to him from 

 descriptions only, he can not be sure that they are correctly placed. 

 Key for winged viviparous female. 



A. Body slender, cornicles as long as, or longer than the body 



T. tenuicorpuSy Okajima. 



Body oblong or oval, cornicles shorter than the body B. 



B. Antennae with five articles T. pasaniae^ Okajima. 



Antennae with six articles 0. 



C. Stigma yellow T. formosauum, n. sp. 



Stigma greyish or blackish brown to black D. 



D. The third antennal article provided with adout 30 sensoria 



• T. kuioanea, Pergande. 



The third antennal article provided with about 22 sensoria 



T. nigru-n, n. sp. 



x See the Bulletin of the College of Agriculture, Tokyo Imperial University, Vol. 

 VIII. no. 1. pp. 1 and 2. 



