Aphididae of Formosa. — I. 13 



Macrosiplmm iieoartemisiae n. sp. 



(PL. I, 1, Figs. 1-5 and PL. IX, 2, Figs. G-0). 



Wingless viviparous female. 



Green. E3'es dark brown. Antennae l:)lack with the base of 

 the 3rd joint pale brown. Femora pale Iii'own with the apices black; 

 tibiae and tarsi black. Cornicles black, green at the base. Cauda 

 dark green. 



Body oval, rather wide, l>roadest at the middle of the abdomen, 

 with some long liairs, some of wliich are knobbed. Frontal tubercles 

 large, not gibbous on the inner side. Antennae verj' long, provided 

 with some setae; the 3rd joint not imbricated, with 3-4 small sensoria 

 in a row near the base; the 4th slightly imbricated, wanting sensoria; 

 the relative length of joints as follows: III-51, IV-42, V-36, VI-69 

 (11 + 58). Rostrum reaching beyond the middle coxae. P>ody with 

 no lateral tubercles. 



Cornicles slender and very long, extending far beyond the 

 abdominal apex; scarcely imbricated; very shghth^ dilated on their 

 apical portion and slightly expanded at the base. Cauda large and 

 ensiform, with some lateral hairs. 



Legs very long and slender, furnished with many short setae. 

 Length of body — 2.3 mm. Antenna — 2.3 mm. 



Cornicle — 1.2 mm. 



Winged viviparous female. 

 Green. Eyes red. Antennae black, with the base of the 3rd 

 joint green. Mesothorax brownish green. Femora green, at the 

 apices black; tibiae and tarsi black. Cornicles blackish, paler at 

 the base. Cauda green. Wings hyaline, with gray veins and stigma. 

 Body with some slightly capitate hairs. Head with numerous hairs, 

 mostly capitate. Frontal tubercles large. ■ Antennae with some 

 bristles and capitate hairs; the 3rd joint with about 20 sensoria 

 scattered about the middle part and very slightly imbricated; the 



