Vol. VIII] ESSIG & KUIVANA—SOME JAPANESE APHIDID/E 109 



bases of the femora and tibia; pale. Abdomen yellowish 

 brown with black markings and two prominent white wax 

 bands on the dorsum. Cornicles black, hairy, very wide at the 

 base, length 0.20 mm., width or diameter at the base 0.35 mm., 

 diameter at the mouth 0.12 mm. Cauda, yellow with black 

 margin; rounded and faintly constricted at base, hairy. Anal 

 plate pale at base with black margin ; rounded and hairy. 



Host plant — Along the midribs on the undersides of the 

 leaves of pear. 



Locality — Nishigahara, Tokyo. 

 Date of collection — Oct. 2, 1913. 

 Collection number — 105. 



Nipponaphis distylii Pergande 

 Figure 39 



This very interesting species was received in considerable 

 numbers, among which were several apterous females; the 

 latter oval in shape, 0.8 mm. long, with 5-articled (sometimes 

 appearing as 4) antennae. The winged forms were taken from 

 the leaf galls of Isu, Distylium raccmosum S. & Z., Tokyo, 

 June 2, 1913. Collection number 71. The apterous females 

 were taken from oval galls on the same plant at the same 

 time and given the collection number 71a. The specific name 

 given by Mr. Pergande^ was distychii, derived from Disty- 

 chium, the supposed host plant. This is clearly an error in 

 spelling, as the host plant is Distylium. The specific name 

 has therefore been corrected to distylii. 



The genus Nipponaphis is, indeed, very close to Cerataphis, 

 and except for the horns on the apterous forms of the latter 

 could hardly be considered as separate. The absence of cor- 

 nicles is usually given as a characteristic of Cerataphis, but all 

 of the author's specimens of a large series of the type species, 

 C. latani(2 (Boisd.), have cornicles as large as those found in 

 Nipponaphis. The peculiar aleyrodid-like form of the ap- 

 terous female is lacking in A'^. distylii Perg. 



' Entomological News, vol. 17, p. 205, June, 1906. 



