Aphiiliilae of Formosa — 4. J I 



Macrosiphum sp. 



Wingless viviparous female 



Brownish black. Antennae, cornicles and cauda black. Distal portions of 

 femora, bases and apices of tibiae, and tarsi black. Body oval. Head provided 

 with some long stout hairs that are shorter than the 2nd antennal joint. 

 Frontal tubercles large, stout, as long as the 2nd antennal joint, straight on the 

 inner side. Antennae provided with some rather long scarcely knobbed setae 

 that are shorter than those on the head; the 1st joint much larger than the 

 2nd, somewhat angulated on the inner side; the 3rd rather stout, not imbricated, 

 furnished with from L5-19 very small protuberant circular sensoria scattered 

 ever the basal half: the 4th striate without sensoria: the 5th with the apical 

 sensorium small, distinctly protuberant; the relative length of joints about as 

 follows: III-125, IV-95, V-74, VI-:iO+ ? Rostrum reaching tin- middle coxae. 

 Abdominal segments each on the dorsum furnished with sonic long stout liristles 

 arranged in a transverse row. 'flic hairs on the abdomen almost as long as those 

 on the head, arising from very small tubercles. Cornicles large, stout, gradually 

 expanded toward the base, not dilated at the base, sometimes slightly curved, 

 imbricated, reticulated on about the distal one-third, much stouter than the 

 cauda, a little longer than the 3rd antennal joint, about 1.6 times as long as 

 the cauda. Cauda long, slender, with some very long liristles. Legs very long, 

 provided with many long very stout setae: tibiae stouter than the 3rd antennal 

 joint; hind tarsi shorter than tin' basal part of the last antennal joint. 



Length of body — about 2.1! mm. Antenna — ? 



Cornicle — about 0.7 mm. 



Host. — Solidago virga-aurea, Lactuca oldhami. 



Distribution. — Formosa: Sankakuho (altitude about 7500 feet) ami Tattaka 

 (altitude about 7300 feet) in Taichu-prefecture. 



Hitherto unrecorded from Formosa. A few apterous forms were collected 

 by the author in May, 1024. 



Macrosiphum itoe a. sp. 



(PI. LA. figs. 1-5) 

 Wingless viviparous female 

 Dark green, sometimes brownish. In specimens treated with caustic potash, 



