Vol. Villi ESSIG & KUIVANA-SOME JAPANESE APHIDID£ 97 



Taken on Maki, Podocarpus macro phylla maki Sieb. (listed as 

 P. chmcnsis Wall.), Nishigahara, Tokyo, May 24, 1913. Col- 

 lection number 57. 



Trichosiphum kuwanai Pergande 



Only apterous viviparous females were taken on Kunugi, 

 Quercus serrata Thunb., Nishigahara, Tokyo, May 15, 1913. 

 Collection number 40. 



Eutrichosiphum, new genus 



Type: Trichosiphum pasanice Okajima 



This new genus has been erected to embrace the type named 

 above, which differs from the other members of the genus 

 Trichosiphum in having but 5-articled antennre. 



Eutrichosiphum pasaniae (Okajima) 



Figure 31 



A number of winged and apterous viviparous females were 

 in this lot. All of the winged females have five articles a^s 

 given by Okajima in his original description of the species^ 

 Inasmuch as the apterous form has not been described, the 

 following brief notes may be of interest : 



Apterous viviparous females — Length 1.3 mm., width 

 0.8 mm. Prevailing color shiny black. Body entirely cov- 

 ered with rather long stiff hairs. AntenucT pale dusky with 

 tips darker and with few long hairs; lengths of the articles: 

 I, 0.05 mm.; II, 0.05 mm.; Ill, 0.25 mm.; IV, 0.11 mm. ; V, 

 0.24 mm. (base 0.09 mm., filament 0.15 mm.) ; total 0.7 mm. 

 As will be seen the antennae are 5-articled as in the winged 

 form. Rostrum long, reaching beyond the base of the abdo- 

 men. Legs short, dusky, hairy. Cornicles black, somewhat 

 swollen in the middle with both ends small, recurved, 0.35 mm. 

 long, their entire sur face closely beset with very short, scale-hke 



» Bui. Col. Agric, Tokyo Imp. Univ., vol. 8, no. 1, pp. 23-26, pis. iv and v, Sept. 

 1908. 



