Al'IIIDID-i: OF FORMOSA. 47 



(4) The second t:u"s;il joint niLitivoly shorter. 

 Host — Finus s}}; :itt;ickin!j; the yonug shoot. 

 Distribution. — Formosu : Shiuten near Taihoku. 

 Two specimens were collected l)y the author on Mavch 15, 1922. 



Dilachnus piniformosanus "• sp. 



Dilachnus species, Takahashi, Aphidid;i3 of Formosa, part 1, p. 82 (1921). 



Ixichmsjnni, Maki. i^mtmMsmm^'^^-''^ OsA'C) V- 35, pi. VI, A. 

 Wirgod viviparous female. 



Dark brown. Body uval, covered with many long rather tine haii-s. 

 Head divided. Eyes protuberant; ocular tubercles very small. Auteuni-o with 

 many very long bxii-s ; the 3rd joint provided with 7 — 10 protuberant circular 

 sensoria of medium or large size arranged in one row over the whole length 

 except the basal porti(.)ii ; the 4th with 2 sensoria ; the 5th with a sensorium near 

 the apical one ; the relative length of joints nearly as follows : III — 35, IV — V-), 

 V— 20, rV— 12. Rostrum reaching beyond the hind cax». Wings hyaline; 

 stigma large and stout ; the 1st oblique on the fore wing almost straight ; the 

 2ud curved ; the 3rd faint, twice forked ; stigmatic vein .almost straight, 

 reaching the tip of the wing ; hind wings with 2 divergent oliliques ; houklets 

 5. Cornicles on hairy c<jnes. Cauda short, liroader than long, broadest at the 

 base, tapering, hairy. Legs long and slender, covered with many \ery long fine 

 hairs; the 2ud tarsal joint of the hind log abiut 2.5 times as long as the 1st. 



Length of body — abaut 3.5 mm. Antjnna — 1.5 mm. 



Fore wing — 5.2 mm. 



Host. — Pimm spp. attacking the twig. 



Distribution. — Formosa : Taihoku. Japan : Tokyo. 



Closely related to Dihiclinus jinidi Koch. 



Eulachnus rileyi (Williams\ ? 



L'-icJimts rilciji, Wilhams, .\phidida_! of Nebrasca, p. 21 (1911). 

 Eithiflmus rilfiji, Wilson, Entom. News XXX, I, p, 5 (1919). 



Wingless vivipirous female. 

 Yellowish brown. Eyes brown. Antennic pale yellowish brown, apices 



