42 



B. Xakalmslii. 



sensorium near the primary one that is not very large; the relative length of 

 joints about as follows: III-175, IV-75, V-65, VI-50. Wings long; the 1st 

 oblique on the front wing straight; the 2nd scarcely or very slightly curved; 

 the 3rd faint, twice forked; stigma normal: stigmatic vein scarcely curved, 

 extending to the lip of the wing; hind wings with 2 divergent obliques; 

 booklets li. Abdomen provided with many moderately long bristles, those on 

 the last segment much longer. Cornicles on hairy cones. Legs long, rather 

 slender, provided with many long \v\-y stout erect setae; tibiae much stouter 

 than the antenna,; hind tarsi longer than the 4th, hut shorter than the 3rd 

 antenna] joint: the 2nd tarsal joint about twice as long as the 1st. 



Length of body — about 5.5 mm. Antenna — about 2.0 mm. 



Fore wing — about G.4 mm. Hind tibia — about 4.3 nun. 



Hairs on the head somewhat longer than those of the apterous form. 



Host. — Finns sp., attacking the twig. 



Distribution. — Formosa: Shinten near Taihoku, Hori and Tattaka (altitude 

 about 7330 feet) in Taichu-prefecture. 



Home apterous and a winged viviparous females were collected by the 

 author at Tattaka ami Hori in .May, 1!»24. 



The above description was made from the specimens from Tattaka. These 

 specimens differ from the type specimens of this aphid in the larger body, as 

 well as in that the 4th antenna] joint of the winged form is somewhat longer 

 than tlii- 5th. An apterous female, collected by the author al Shinteu near 

 Taihoku on April 27. 1024. is porvided with one or two medium-sized sensoria 

 about midlength of the 3rd antenna] joint. 



Dilachnus liquidambarus n. sp. 

 Winged viviparous female 

 Head, eyes, antennae, thorax, cornicles, cauda, coxae, tibiae and tarsi black. 

 Distal halves of front and middle femora and apices of hind femora black, the 

 remaining parts of femora reddish brown. Wings hyaline, very slightly clouded 

 along the 1st and 2nd obliques and below the subcosta of the front wing: 

 narrowly blackish brown on the distal part of the anterior margin of the front 

 wing (this part is adjacent to the stigma); stigma almost black: subcosta almost 

 black, with yellowish brown bases; other veins brownish. Abdomen brownish. 

 with 3 large black patches on each side in front of the cornicle. 



