Aphididae of Pormoea. — 3. 46 



paid yellow ill colour. Coriiiulcs longer, cylindrical, not dilated at the base, almost 

 as long !is, or very sliglitly longer (Imn, llie li:isc of (lie last antcnnal joint as in the 

 second instar, aliout or slightly nion: (han, twice as long as wide. Cauda longer, 

 provided \\itli 7 liristles. 



Length oflvjdy al)oat 1.1 mm. Antenna-about 0.7 mm. 



(Fourth instar) "Wing pads nuK^i longer, blackish in colour. The relative 

 lengMi of antcnnal Joints as follows : 111-32, IV-25, V-25, VI-65 (20+45). 

 Cornicles longer, almost as long as the 4Ji antennal joint, aljout 2.5 times as long 

 as wide. Cauda longer, provided with 9 bristles. 



licngth of body-about 1.2 mm. Antenna about 0.8 mm. 



The above description was made from specimens on Bii/ri/.s pi/osd. Some, 

 viviparous females, loth winged and wingless, were observed on Emilia smivhi/v/id 

 on Novcml)er 9, 1922, neirTaihokn. 



Aphis miscanthi Takah. 



ApIadiJae of F.)rmosa, part 1, p. 55 (1921) and ibid., part 2, p. 108 (1923). 

 Winglcs.-! viviparous female. 



Yellowish gray, dirty yellow or purplish. Head very small. Eyes very 

 small, not distinctly protuberant, with ocular tubercles. Frontal tubercles as in 

 .l/j/iis / mnJinsac Full. Antennie shorter than the body, slender, imbricated, 

 5 \)inted, almost destitute of Iiiirs; the 1st joint much larger than the 2nd; the 3rd 

 much mure slender than (he liliia, without sensoria; tiic 4t]i with a small circular 

 s.'usorium near the tip; tlu^ rclalive length of joints al)out as follows: III 6t>, fV 

 ;;2, V 97 (20 + 77). liostrum stout, reiiehing the middle coxae. Body provided 

 witii a few very small lateral tubercles which are longer than wide. Ablonien 

 lurnished with some long fine hairs on the posterior part. Cornicles very sliorl, 

 siiorter than the cauda, almost as long as or slightly longer than the basal part of 

 the last antcnnal joint, almost twice as long as wide, slightly dilated toward the liase, 

 not expanded at the base, narrowest near tiie tip, imbricated, not reticulated. Cauila 

 stouter than the cornicle, constricted aV)oiit midlength, almost as long as or siiorter 

 than the 4th antennal joint, provided with many long bristles. Legs long, rather. 

 stout, furnished with many long fine hairs; hind tarsi almost as long as the basal part 

 of the last antennal joint. 



Length of body-about 1.5 mm. Antenna-about 1.0 mm. 



}lont.-3Iiscaiithu>i i^pp., Sacchuram officiHuruin. 



Distribution.-Formosa. Japau. 



