VOL. VIII] ESSIG & KUWANA-SOME JAPANESE APHWIDJE 75 



pairs of lateral tubercles. Cornicles black, imbricated and very 

 short, 0.05 mm. long. Cauda black, 0.25 mm. long. 



Nymphs— pale with dark wing pads. 



Host plant — Japanese pear. 



Locality — Omori, Tokyo. 



Date of collection — May 12, 1913. 



Collection number — 29. 



Remarks— Named from its very short cornicles. 



Aphis somei, new species 



Figure 19 



Winged viviparous female (Type)— From a large series. 

 Length 1.6 mm., width 0.7 mm. Prevailing color dark olive 

 green and black. Antennae black throughout, imbricated, well 

 clothed with conspicuous and quite long hairs; lengths of the 

 articles- L 0.06 mm.; II, 0.06 mm.; Ill, 0.31 mm.; IV, 0.25 

 mm.; V, 0.27 mm.; VI, 0.43 mm. (base 0.12 mm., filament 

 31 mm.); total 1.38 mm. Sensoria on III (right) 8; IV 

 (right) 2- (left) 3. On the paratypes the number vanes as 

 follows: III, 8-14; IV, 1-5 ; V and VI have the normal ones. 

 Rostrum reaching nearly to the 3rd cox^. Thorax shiny black 

 with large blunt prothoracic tubercles on the sides, trout 

 wings 3.2 mm. long. Abdomen dark green with black trans- 

 verse markings on the dorsum. Cornicles very short, black, 

 imbricated, slightly swollen at the base or middle with flaring 

 mouth, length 0.12 mm. Cauda dark, 0.14 mm. long. 



Apterous viviparous females (Paratypes)— A large 

 series of specimens. Average length 1.9 mm., width 1.3 mm 

 Prevailing color brown or purplish, often slightly covered with 

 whitish powder. Antennae dark with the bases of III, IV and 

 sometimes V pale; lengths of the articles: I, 0.09 m^-; "' 

 07 mm. ; III, 0.38 mm. ; IV, 0.26 mm. ; V, 0.25 mm. ; VI, 0.42 

 mm. (base 0.13 mm., filament 0.29 mm.); total 1.47 mm. 

 Lateral prothoracic tubercles present and at least one pair of 

 tubercles on the abdomen. Cornicles short, usually widest at 

 base with flaring mouth, imbricated, 1.51 mm. long. Cauda 

 greenish to dark, wide at base, pointed, 0.09 mm. long. 



