10 KVdRHl TAK:Ur.VSll[: 



Descriptions of new or little=known 

 Formosan Aphididae. 



Macrosiphum cirsicola n- sp. 



(Vl II, 15, Cys. 4—5) 



A\ iuglass viviparous fouialo. 



Yellow or giojuiisli yellow. Eyos d.a-k roddish lirowu. Auteuiia? pale 

 lirowu, with the apicos of the I'rd and 4tli joints, aud tlie 5th and Gtli dusky. 

 Cbniifles pale gi-een, with black apices. Cauda pale yellouish greeu. Legs 

 pale lirowii, apices of femora and tibi;B, and tai-si black. 



15ody with a few short bristles. Head with soiui; nioilerately long some- 

 what knobbed setiw. Frontal tubercles developed, somewhat conxex on the 

 inner side. .Vntcnna? very long and slender, with some very short slightly- 

 knobbed set;!'; the Jird joint proviiled \\ith about 9 mostly small circular 

 sensoria distri!)uted almost in a single row on the basal half; the 4th .slightly 

 imbricah'd, Licking sensoria; the relative length of joints as follows: III — 

 178, IV— 1-24, \'— ] 02, VI— -is + ? 200. llostrum reaching the middle coxa\ 

 C'l^rnicles cylindrical, very long and slender, slightly dilated at the base, 

 imbricated throughout, without any reticulations, almost as long as the 4th 

 autennal joint, aliout 1. 7 tiuies as long as the cauda, to which it attaius 

 midlcngth. Cauda ensiform, wider than the cornicle, with 3 pairs of lateral 

 bristles. Logs very long and slender, provided with many rather kmg normal 

 SL'tct) ; tai'si not very long. 



Jjength of lx)dy — aliout 3.5nnu. AutLMma — about 5.0 mm. 



Cornicle — 0.9 mm. 



Winged viviparous female, 

 (ireen. Head very slightly pale brownish. Eyes dark brown. Antenna) 

 almost black. IMesothorax pale brown. .Vlilomen with some d.irk gieeu 

 patches on the doi-suui. Cornicles pale brown, with Ijlack apicos. Cauda pile 

 green. Legs pale brown, disbil halves of femora, apices of tibial and Lirsi 

 black. Wings along the 1st and 2Md obliipies very narrowly fuscous clouded ; 

 veins almost gray ; stigma pale gray. 



