16 EYOICm TAK.UI.V-HI: 



Macrosiphum taiwanum u- sp. 



(PI. 1, B. ligs. 1^4) 



Wingless viviparous femalo. 

 Wliite. EvfS l)lack. AiitciiDji' white ; apices of tlio ord and 4th"^joinis, 

 apical half of tlie ;"tli, aud the Oth Mack. Coraides white, with Mack apices 

 Cauda wliite. 



Fore femora \\Iiite, ^\itll black apices, jxisterior two pah's of femora mostly 

 black ; tibiic wlute, with black apices ; tarsi black. Body "n-ith peculiar 

 black or blackish l^rowu markings on the dorsum as shown in the figure. 



Body oval, without haii-s. Head with a few \ery short capitate hairs. 

 Frontal tulxireles large, slightly convex ou the inner side. Anteuufo very long 

 and slender, much longer than the body ; the 1st joint somewh;it augulated 

 on the inner side ; the 2ud much shorter than the 1st ; the 3rd not imbricated, 

 with a circular seusoria of medium or rather small size near the base ; the 

 4th slightly imbricated ; the relative length of joints as follows : III — 90, IV 

 —64, y— 63, VI— 130 (26^104). Ptcstrum reaching the hind legs. 



Body lacking lateral tubercles. Cornicles cyhndrical, very long aud slender, as 

 Idug as the 4th auteuual joint, reaching iicai- tli(» caudal aj^xjx, scarcely dilated 

 ou the middle or base, scarcely imbricated, except the ti]), almost twic(» as long 

 as the Cauda. Caudxi very large and stout, gradivdiy taixn-ing, Mith the apex 

 rouudeil, with a slight consti-iction about midleugth, provided with 2 pairs of 

 long lateral Imstles. Legs very long aud slender, with some short setae. 



Length of 1x)dy — about 2.3 mm. Anteuna — 2.7 mm. 



Cornicle — 0.45 uuu. 



Host. — ;;nkuowu. 



Distribution. — Formosa (Kwanshii-eij. 



Genus Neophorodon Tafcih. 



Proc. Eutom. Soc. Washiugtou, 24, p. 204 (1922). 



(Wingless form). Body provided with many capitate hau-s. Frontal 

 tubercles large, v ithout projections ou the mosjd face. AntenuiP 6 — ^jointed ; 

 spur longer tluui the base; tlu> 1st joint with a bhiiit tubercle ou the inner 



