Aphi'lidae of Formosa. — I. 9 



brown, with the apices dai-ker. Legs pale brown; apices of femora 

 and til)iae darkei'. 



Body elongate ovate, broadest at tlie middle of the alidomen, 

 with a few stout hairs, some of which are shghtly capitate. 



Frontal tubercles large. Antennae with some stout hairs, mostly 

 somewhat capitate; the 3rd joint not imbricated, with 3 sensoria in a 

 row near the base; the 4th not imbricated, without sensoria: the 5th 

 slightly imbricated, the apical sensoria very small; the relative length 

 of joints as follows: III-93, lV-74, V-o5, VI-llO (U + 96). 

 Rostrum reaching the middle coxae. Cornicles cylindrical, very 

 long and slender, but expanded at the base, reaching the caudal apex, 

 slightly imbricated, and at the tip with a distinct reticulation. Cauda 

 ensiform, with about 8 lung bristles. Legs long, with numerous stout 

 setae. 



Length of body — 2.G nmi. Antenna — 3.6 mm. 



Cornicle — 0.83 mm. 



Closely allied to J/, granar'mm (L.), frum which it is readily 

 distinguished l)y the structure of the antennae and the length of the 

 cornicles. 



Host. — Miscanthus sp. Collected by ]Mr. ^laki. 



Distribution. — Formosa (Taihoku). 



Maerosiphum alopecuU n. sp. (PL. 1, 2, Figs. 1-5). 

 Wingless viviparous female. 



Described from specimens preserved in alcohol. Yellowish 

 brown. Eyes black. Antennae, legs and cauda yellowish brown. 

 Cornicles yellowish brown Avitli the apices black. 



Body oblong, broadest at the middle of the al>domen, nearly 

 destitute of hairs. Head with a few short slightly knobbed hairs; 

 frontal tubercles moderately conspicuous. 



Antennae with a few short hairs which are somewhat capitate; 

 the 3rd joint not imbricated, with '1 or 3 small sensoria in a row near 



