Apliididac ol' ForumsH. — 3. ^1 



Macrosiphum species. 



(ri. n, ]5, iig. 5& PI. IV, A, ti- I) 



Wingless vivipiUMiis iwiuile. 



(irei'ii. Antcimao dusky? ('oruicles liliick, with (Ik; i.a^cs jialu grcciiisli. 

 Cauda irrccn? Legs mostly git'ciiish'.' ' 



Body oval, turnislu'd \\i(li iu:uiy riitlicr Lmg stonf hristlcs, wliicli ai'c not 

 capitate. Head witli some very long Ill■i^tles wliirli are very slightly Isimlilied. 

 Frontal tubcreles very huge, straight on tlie inner side. Antennae very hmg and 

 slender, with some long V(n-y sliglitly knohbed liairs; the Ist'oint very large, much 

 longer than thr 2n(], somewliat convex on the inner side; the ^Ird somewhat luirved, 

 l)riivided with tVoiii 3-5 small riiculir sensoria near the base; the 4th lacldiig 

 sensori'i; the relative lengtii of ;oin(s as follows: 111-210, I\'-18S, V-1.54, V[-2yO 

 (70 + 220). It.ostrum reaching beyond tjie middle coxae'.' Cornicles long and 

 slender, cylindrical, somcwiiat expanded towaid the base, imbricated, reticulated on 

 tlie distal hall', slmrter than the Sth antennal .'oint, nearly t\\i<'e as long as the base 

 of the last antennal .ioint, about 1.3 times as long as the cauda. Cauda, very large, 

 stout, longer than the base of tiie last antennal joint, provideil witji some long 

 bristles. Legs very long and slender, provided with many long stout liairs wjiicii 

 are not capitate; hind tarsi much shorter than the base of the last antennal joint. 

 Jjength of body-about 2.3 jnni? Antenna al out 4.4 nun. 

 Coruielc-about O.tio mm. Cauda-aliout O.-l nun. 



ll^jHt.'Artcmisid VHhjuri.s, vnr. imfica. 



Distribution. -Formosa : Taihoku. 



A few wingless forms were collected on .January 22, 1923, by Mr. K. Kurosawa. 

 Macrosiphum gobonis Ala's. 



Aphididae of Formosa-1, p. 5 (1921) and Aphididao of Formosa 2, p. (JO 

 (1923). 



Nymph of viviparous female. 



Key to instai'S. 



( 1 ) Antennae •") jointed ( 2 ) 



Antennae 6 jointed ( 3 ) 



(2) Tlie 3ril antennal joint lacking hairs The 1st ins'.ar. 



The 3rd antennal joint with sonic bristles. Tin; 2nd instar. 



( 3 ) Cauda, when seen from above, as knig as w'ide The 3rd instar. 



Cauda longer than wide H he 4th iustar. 



