204 PROC. ENT. SOC. WASH., VOL. 24, NO. 7-8, OCT. -NOV., 1922 



TWO NEW GENERA OF APHIIDAE > (HOMOPTERA). 



BY RYOICHI TAK.AHASHI, 

 Dept. dgri., Gov't Research Institute, Taihoku, Formosa. 



Neophorodon new genus. 



Wingless form. Body provided with many distinct capitate hairs. Frontal 

 tubercles conspicuous, lacking tubercles on the inner side. Antennae 6-jointed, 

 spur of the 6th joint longer than the base, the 1st joint provided with a promi- 

 nent tubercle on the inner side. Eyes normal. Dorsal and lateral tubercles 

 absent. Cornicles long, gradually swollen on the distal half. Cauda stout, 

 shorter than the cornicle, longer than wide, tapering. Anal plate and tarsi 

 normal. 



Winged form. Body lacking capitate hairs. Frontal tubercles short. 

 Antennae provided with circular or oval sensoria, the 1st joint with a small 

 tubercle. Wing veins normal. 



Type. Neophorodon rubi new species. 



This new genus is closely allied to Phorodon Passerini and 

 Acanthaphis Matsumara, but differs from the former in lacking 

 projections on the frontal tubercles, and from the latter in hav- 

 ing no tubercles on the dorsum of the abdomen. 



Neophorodon rubi new species. 



Wingless viviparous female. Pale yellow. Eyes black. Antennae mostly 

 black. Cornicles pale brown, with black apices. Cauda yellow. Legs pale 

 brown; apices of tibiae, and tarsi black. 



Body oblong, provided with many rather long capitate hairs. Frontal 

 tubercles conspicuous, almost as long as the 2d antennal joint; the inner side 

 very slightly convex, lacking projections, but provided with 2 capitate hairs. 



Antennae provided with a few short capitate hairs; the 1st joint much larger 

 than the 2d, with a broad blunt tubercle, which does not reach the apex of the 

 2d joint and provided with two capitate hairs, on the inner side; the 2d joint 

 lacking tubercles; the 3d joint slightly imbricated, lacking sensoria; the 4th 

 joint imbricated; the relative length of joints as follows: 111-33, IV-22, V-21, 

 VI-61 (15 + 46). 



Rostrum reaching middle legs. Eyes normal. Body lacking dorsal and 

 lateral tubercles. Cornicles long, as long as the 6th antennal joint, almost 

 reaching the base of the cauda, almost not imbricated, somewhat swollen on the 

 distal half, expanded at the base, about 4.2 times as long as wide, about 4 times 

 as long as the cauda. Cauda short, stout, triangular when seen from above, 

 longer than wide, with the apex rounded, provided with 2 pairs of moderately 

 long lateral bristles. Legs slender, furnished with many capitate hairs; hind 

 tarsi a little shorter than the cauda. Length of body, 2.2 mm.; cornicle, 0.4 

 mm.; antenna, 1.3 mm. 



Winged viviparous female. Yellowish brown. Head, antennae, and thorax 

 black. Abdomen somewhat dusky at the middle of the dorsum. Cornicles 

 slightly dusky. Cauda yellow. Wings hyaline; stigma gray; veins dark 



'Takahashi's spelling Aphididae amended by the editor. 



