10 



E. Takahaslii 



tarsal joint almost thrice as long as the 1st. 



Length of body — about ."3.8 mm. Antenna — about 1.4 mm. 



Hind tibia— about 1.9 mm. 



Winged viviparous female 



Legs black, except on the bases of femora, in a specimen treated with 

 caustic potash, antennae dusky on the apices of the 3rd, 4th and 5th joints, 

 and the 6th, abdomen with some small dusky spots. 



Body covered with many very long fine hairs. Antennae rather slender, 

 almost as long as the front tibia, covered with many very long hairs which are 

 a little shorter than the 4th joint and somewhat stouter than those on the 

 body; the 3rd joint provided with 4 or 5 rather large circular sensoria on the 

 distal half arranged in a single row: the 4th with 2 similar sensoria: the 5th 

 with or without a secondary sensorium near the very large usual one : the 6th 

 with some sensoria near the larger one: tin- relative length of joints about as 

 follows: [11-112, IV-50, 7-65, VI-55. 



The 1st oblique on the front wing stouter than the "2nd, straight: the 2nd 

 very slightly <>r scarcely curved: the 3rd faint, twice forked: stigma large, not 

 elongate at the distal end: stigmatic vein very slightly or scarcely curved, 

 extending to the apex id' the wing: hind wings with 2 divergent obliques; 

 booklets 5. Legs very long, stout, much stouter than the antenna, covered with 

 many very long hairs: bind tarsi shorter than the 3rd, hut longer than the 5th 

 antennal joint, the 2nd tarsal joint about 3.5 times as long as the 1st. 



Length of body— about 4.2 mm. Antenna — about 1.5 mm. 



Fore wing — about 4.75 mm. Hind tibia — about 2.6 mm. 



1 lo-t. — Tsuga fwmosana. 



Distribution. — Formosa: Sakuragamine (altitude about 8000 feet) in Taichu- 

 prefecture. 



Some apterous and a winged viviparous females were collected by the 

 author on May 20. 1924. 



Dilachnus formosanus Takah. 



Aphididae of Formosa — :;, p. 73 (1924). 



Dilachnus up. Takahashi, Aphididae of Formosa — 2. p. 46 (1923). 



