June, '06] ENTOMOLOGICAL NEWS. 205 



Description of two new genera and three new species 



of Aphididae. 



BY THEO. PERGANDE. 



While examining a series of Aphids, received by the Bureau 

 of Entomology of the U. S. Department of Agriculture, from 

 Mr. S. I. Kuwana, of the Imperial Agricultural Experiment 

 Station at Nishigahara, Tokio, Japan, I discovered among 

 them a number of specimens of two highly interesting genera, 

 one of which has been previously discovered on the Island of 

 Java. These the writer takes the liberty of describing herewith. 



NIPPONAPHIS n. gen. 



This remarkable aphid, which is represented by a single spe- 

 cies, resembles in venation and in the strongly annulated an- 

 tennae the genus Schizoneura, but differs from the latter in 

 having antennae which are only 5-jointed ; the two basal joints 

 short and subequal in length, the following three joints of 

 almost equal diameter and strongly annulated ; joint 3 is much 

 the longest and longer than the remaining two combined. 



Head, including the eyes, narrower than the thorax and 

 broader than long, its frontal margin slightly convex. The 

 two discal ocelli are placed in front of the eyes, and the third 

 one at the middle of the anterior edge. Posterior tubercle of 

 the eyes very small. Nectaries represented by pores only, and 

 situated far back, apparently on the sixth abdominal segment. 

 Tail short, broad, semicircular ; last ventral segment notched 

 at middle of posterior edge. 



Third discoidal vein of the front wings with one fork. 



Nipponaphis distychii n. sp. 



The note sent by Mr. Kuwana is rather short and unsatis- 

 factory ; it reads as follow : "Head and eyes black. Prothorax 

 dark purplish yellow. Dorsal aspect of meso-metathorax 

 black. Abdomen dark purplish brown. Producing galls on 

 the leaves of Distychium racewoxuni at Nishigahara, October 



23- 1905-" 



