Aplilili.liP or Fornioai.— .1. 1 7 



Macrosiphum species. 



Wingless viviparous trmalc. 



Green. TIead lirowiiisli ur(.pu. Eyes ilark Imnvn. Antennae and eornicleg 

 lilark. Alxliiinen diiskv on th(! dorsum. Legs jale lirowii, apical liiilves oi frinora, 

 apiees of tibiae, and tarsi black. 



Body oval. Head provided \vitli aiioiit 10 nioderat(j to rather long setae, 

 some of whic'i are slightly knolthed. Frontal tubercles moderately developed, 

 scarcely convex on tlie inner sid(^ 



Antennae very long and slender, provided with some moderate to rather long 

 setae wiiich are slightly capitate; tlie ;>rd Joint not imbricated, provided witli 

 about 2 rather small circular sensoria near the base; tlie 4th somewhat imbricated, 

 lacking sensoria; the relative length of joints about as follows : III-155, IV-110, 

 V-8o, VI-202 (:i2 + 170) Rostrum reai'hing a little beyond the middle co.\ae, 

 Body without tubercles. Abdomen provided with some raUier short setae arranged 

 in a transverse roM' on the dorsum of tlie segment. 



Cornicles long, cylinilrical, moderately expanded toward the base, somewhat 

 dilated on the apic:il portion, very slightly curved, imbricated, reticulated on about 

 the apical one-tliird, almost twice as long as the <Muda, a little sliorter th:\n tlie ord 

 aiitciiual joint. 



Cauda stout, s.'oiiter than the cDriiiclc, about twice as long as wide, ]irovide(l 

 with 10 long bris:les. Legs very long and slender; tiliiae stouter tiian the anteuni, 

 more slender than the cornicle, jirovided with m\ny rather long setae wJiicii are not 

 knoblK'd; tai^i imbricated, hind tarsi almost as long as the base of the last antennal 

 joint. 



Length of body aliout 2. 3 mm. Antenna about 2. 8 mm. 

 Cornicle about 0.<5o mm. 



'Hofft-Ldcf/K'ti ihJiiJis. attacking the stem. 



I )istril)ut ion -Formosa: Taiiioku. 



Two specimens were cdllected by the author on February 25, 1923. 



Macrosiphum alopecuri Takali. 

 (I'l. IT, A, tig^. 1-0 ct IM. V, A, tigs. 45) 

 Apliididae of Formo.sa-1 , p. 9 (1921). 



Wingles-i viviparous female. 

 Green, darker at tlie middle of the dorsum of tlie abdominal segment. Eves 

 dark Ihmwu. The ord and 4lli antennal joints lirownisli, with tlie apices blick, the 



