40 K. Takahashi. 



black, tibiae brownish black. 



Body with some moderately long stout liaivs. Eyes large, ocular 

 tubercles prominent. Frontal tubercles very short. Antennae very 

 short and rather shout, 5-jointed, imbricated, with some moderately 

 long stout iiairs; the ord joint with aliout l<S-23 circular sensoria i)f 

 various size scattered over the whole length; the -ith joint with '1 rather 

 small sensoria, the apical sensoria large; the relative length of joints as 

 fulluw.-,: 111—51, IV— 111, V— 81 (li) + 71). Rc.strum reaching the hind 

 coxae. Prolhorax and the 1st abdominal segment with a very small 

 blunt tubercle on each side. Wings with normal veins, the 2nd fork of 

 the 3rd oblique short; hind wings with 2 parallel obliques; booklets 5. 



Cornicles stout and rather short, not reaching the cauda, about 4 

 times as long as wide, .somewhat swollen on the distal half and minutely 

 imbricated. Cauda wedge-shapt-d, longer than wide, with 2 pairs of 

 lateral bristles. 



Legs moderatly long, with many setae. 



Length of ImkIv — \A\ nun. Antenna — 1. I nnu. 



Fore wing — 2.1) mm. Corniclc: — 1.7 mm. 



Host. — Papaver somniferum, attacking the root. 



Distribution. — Formosa (Toyohara) 



This curious aphis has been collected bj' ]\Ir. Okuni in Decembei 

 1921. 



Ilyalcypterus pruni (Fab.) 



Aphis p'uni, Fabricius, Ent. Syst. iv. j). 21 i (171)4). 



Aphis arundinis, Fabricius, I']nt. Syst. iv, p. 212(1794). 



//i/alopiermprunr, Koch, PHanz. p. 21, tigs. 27-30(1857); Buckton, 

 Mun. r.rit. Aphid, ii. p. 110. pi. L.XXV. Hgs. 1-3(1877); Theobald, 

 Hull. Ent. Research, iv, p. 331(11)14): Patch, .Maine Agr. Expt. St. 

 liull. 233. 266 (1914): van der Qoot, l^.eitrage Kenntnis Holland Blattl. 

 p, 261 (1915), andContrib. Fauna Ind. Neerland., i. iii. p. 125 (1917); 

 lYlatsumura, .Tour. Coll. Agr. Sapporo, vii. pt. (>, p. 358(1918); Das, 



