ArHrniD.E of fokmosa. 



10 



Trichosiphonaphis Takab. 



Proc. Eutom. Soc. Washigfajn, 24, p. 405 (1922). 

 Wiugless form. 



Body broad, with S(ime sLoii capitate liair.3. Frontal tubercles laPge, 

 with a short, blunt tubercle on the inner side. Anteuna" (3-jointed ; spur 

 longer than the base; the 1st joint slightly convex on the inner sid*. Lateral 

 and dorsal tubercles absent. Cornicles cylindrical, slightly swollen near the 

 apex, provided with some prominent capitate ban's. Cauda large, longer than 

 wide, shorter than tlie cornicle, somewhat constricted at the base. Tarsi 

 normal. 



Winged form. 



Body without capit;ite hairs. Frontal tubercles very short, slightly convex 

 on the inner side. Antenna? G-jointed ; sensoria circular. The 3rd oblique 

 twice forked ; hind wings with only one oblique. Cornicles cylindrical, 

 slightly swollen near tlie apex, provided ■(\'ith some prominent liristles which 

 are not capitate, ('auda short and stout. 



Type. — Mi/zus p lucjoniformosamun Takah. 



This genus differs from M/jzus Pass, in the following points : 



1. Hind wings with only one oblifjue. 



2. Cornicles provided with normal or capitate hairs. 



TrichosiphonapMs polygoniformosanus Takah. 

 (PI. ni, B, figs. 2-4) 



Winged viviparous female. 

 Bjdy lacking hairs. Head with a few normal hairs. Front d tubercles 

 very sboi-t, somewhat convex on the inner side. Antennas imbricated, lacking 

 hau's ; tha 1st joint scarcely convex on the inner side ; the 3rd provided with 

 about 45 very small, circular seusijria scattered over the whole length ; the 

 4th with 18 very siuiill sensoria ; the 5th with alx)ut 8 sensoria almost in a 

 row, the apical sensoria larger; the relative length of joints as folk)ws : III 

 —61, IV— 37, V— 32, YI- -91 (13 + 78). Kosti'um reaching the I'd!.. ,..,XiP, 



