Vol. VIII] ESSIG & KUIVANASOME JAPANESE APHIDIDAi 37 



The winged viviparous female was selected in all such cases. 

 Many of these types are not perfect but are fairly so. The 

 other specimens of a lot from which a type was selected are 

 designated as paratypes. Where no type could be decided upon 

 the descriptions have been made, as is the usual custom, from a 

 number of individuals, all of which are designated as cotypes. 

 Types bear a red name label and the paratypes and cotypes 

 yellow name labels. The types, representatives of all the co- 

 types and many of the paratypes, as well as other determined 

 material received from Japan and discussed in this paper, have 

 been presented to the California Academy of Sciences, Golden 

 Gate Park, San Francisco, California, where they are housed in 

 a substantial fireproof museum building accessible to all scien- 

 tific workers. Duplicate material has also been presented to 

 the Imperial University at Tokyo for the use of Japanese 

 workers. The remainder of the material is in Professor Essig's 

 collection. 



Abbreviations Used in Figures 



A — apterous viviparous female 



A ant. — antenna of apterous viviparous female 



A ant. iii — article III of antennae of apterous viviparous 

 female 



A ant. iv — article IV of antennae of apterous viviparous 

 female 



A ant. V — article V of antennas of apterous viviparous female 

 ant. VI — VI 



A Cauda — cauda of the apterous viviparous female 



A corn. — cornicle of 



A head — head of the 



A hind t. — hind tarsi of the apterous viviparous female 



A an. pi. — anal plate 



A pyg. — pygidium of the apterous viviparous female 



W — winged viviparous female (abbreviations following this 

 letter refer to the same parts as those of the apterous vivi- 

 parous female already given above) 



W wax pi. — wax plates of the winged viviparous female 



Pro. tub. — prothoracic tubercle 



