Oct., 1920 Bulletin of the Brooklyn Entomological Society 115 



hoary with numerous fine caHces ; postocellar area convex, 

 cahces larger; antennal, vertical, and ocellar furrows obsolete; 

 prominent polished area between each later ocellus and a com- 

 pound eye; mesonotum including mesoscutellum punctulate; 

 mesopleuras with dorsal half finely closely punctured ; wings 

 hyaline, costa and stigma and veins black; saw-guides with 

 dorsal margin straight, ventral margin convex, distal end 

 rounded. Length 7 mm. 



Habitat: Ithaca, New York. No. 59-4-1. 



This species is similar to flaccida but the difference in the 

 topography of the head will separate them. 



ON SOME SPECIES OF THE GENUS NIPPONAPHIS 

 PERGANDE (APHIDID^, HEMIPTERA). 



By Ryoichi Takahashi, Taihoku, Formosa. 



Genus Nipponaphis Pergande 1906. 

 Syn. Schisoneuraphis Van der Goot 1917- 



Up to the present time this remarkable genus has been re- 

 corded only from Japan and Java. From the former country 

 four species are now known — N. cuspidatce Essig et Kuw., N. 

 distylii Perg., N. yanonis Mats., and N. distyfolicc n. sp. 

 N. cuspidatae Essig and Kuwana. 



-The species is very common on the young shoots of Quercus 

 dentata and Q. cuspidata. 



All the other Japanese species of the genus are found on the 

 leaves of their food plants, have alternate hosts and make very 

 prominent galls. N. cuspidatce, however, does not have two 

 hosts but spends the whole life cycle on the Quercus, without 

 producing galls at all. The winged forms appear only in the 

 spring and no sexes occur through the year in Tokio. 

 N. distyfoliae n. sp. 



This aphis produces very prominent galls on the leaves of the 

 winter host, Distylium racemosum. 



