lOU K. Takahaslii 



tlirougliont tlie wliole length of the segmeut; the 4th with from 13 to 14 similar 

 Bensoriii; the 5tii sliglitly more slender than the 4th, with about 18 similar 

 sensoria; the 6th with about 10 similar sensoria; the relative length of joints about 

 BS follows: III-170, IV-50, V-64, VI-45. Rostrum slender, reaching beyond the 

 hind coxae. Fore wings ample, the 1st oblique scarcely curved, the 2nd very 

 slightly curved, these two veins ai-ising quite close together; the 3rd obscured for 

 some distance at its base, once branched, the upper branch extending nearly to the 

 apex of the wing; stigmatie vein long, somewhat curved; hind wings with 2 diver- 

 gent obliques; hooklets 4. Abdomen rather broad, M'ithout wax-pores. Cornicles 

 on somewhat elevated tubercles whicli are furnished with a few long stout hairs. 

 Cauda very short, inconspicuous. Legs slender; tibiae more slender tiian the 3rd 

 antcnnal joint, with many moderately long setae; tarsi slender, not iinljricated; 

 liind tarsi as long as the 6th antennal joint. 



Length of body about 2.7 mm. Antenna-about 1.6 mm. 



Fore wing-about 3.5 mm. 



Wingless viviparous female. 

 Brownish. Body provided with some long stout bristles. Head furnished 

 with 6 small groups of wax-pores between the antennae'and 4 similar groups arrang- 

 ed in a transverse row between the eyes. Each of these groups consisting of from 

 5-9 very small circular wax-pores. Eyes composed of 3 facets. Antennae long, 

 6 jointed, witii a few siiort setae; the 3rd joint the longest; the 5th much longer 

 tiiau the 4th, as long as the 6th, with a small circular seusorium near the tip. 

 Each thoracic and abdominal segment with 6 or more groups of very small wax- 

 pores arranged in a transverse row on the dorsum. Legs long, with some rather 

 long setae; hind tarsi a little longer than tJie 5th antennal joint. 



Jjcngth of body about 3.0 mm. 



The fully-grown nymphs of the winged form are brown in colour, and are 

 provided with some long stout bristles and well-developed wax pores in groups on 

 the dorsum of abdomen. 



Rost.-Clematis fouriana, attacking the stem. 

 Distributiou.-Formosa : Kusukusu, Koshum. 



The author found many winged females and their nymphs grouped quite 

 densely on the host on November 24, 1923. This aphis differs from other species 

 of KnoxoiiKi in having longer antennae, as M'ell as iu certain characters of the wax- 

 pores, 



