loi EYUICUI TAKAHXSHI: 



Plant-lice and ants. 



Some sjxjcies of Slucroaiphum, Mocroslphonidla , SLf.vs, AmjiltoycpJiom, 

 Mi/zocallis, Greenkhn, Adcijoptcri/x, etc. and gall-iuhiibitiug oues are not attended 

 li_\ ;mts, but many others are Iiabiliially \isited by tbeiu. 



In Formosa probably the most common iiphid-attendauts are Poli/rI(ac/<l.s 

 dives Smith and Craiiatogaster roijcnhojeri Ma;\T. These insects construct so 

 called susjxiuded nests around the branfhas of trees and attend almost an^- 

 species of the ajjhid, although the latter ant has never been found in tl.e 

 colonies of Dilachnm species and Euhirlinxs pini/orinosanns Takali. wliich feed 

 on the Plmis. The colony of jij/hid 7nisc(i/it/ii Takah., fecxliug on the 

 Bliscuidlim, is almost always covered with tents by L'lp/iohii/riue.c qn'idris- 

 2)inos2ts Jei'don subsp. tamiitOi Forel, and tliose of Aphi^i some! Essig et Kuw. 

 and Lacltrms (hvJafoJicc nieol). are sometimes In- C re matrxjaster roijenhqfvri 

 Ma}!-. 



Some foreign species of the gimns Puindrtiis are found iu the nests of 

 juiLs and are carefully tended by these insects, but the Formosan species, 

 Puraddvs cijnodouti (Das), is not tendetl by any auts. 



(icoiai hici/wju (v. d. Goot), ^^hich is subterauean iu habit like some 

 Paraddus, feeding on the root of the Si'-cc/iurv.m oJfkiiKi rum, is said iu For- 

 mosa, to be often found in the nests of an ant. 



Tlie autlicr, in Formosa, has colle(te<l the following aphidicokais ants 

 ^^•llich were kiniUy identified b}- Dr. A\'heeler of North America : 



(1) Cremiiioijasier popohann Forel, attending Aphis (jossijpii G\o\e. \i\x. 

 cullii uqxB Takah. 



(2) Crciaatogasler roijathoferi MajT., attending Aphis miswntlii Takah., 

 Aphis somei Essig ot Kuw, Aiiliis pomi De Geer, Aphis shiral-ii Takah., 

 Aphis malvce Koch, Aphis (jossi/jni Glove, var. ccJUcarpce Takah, Hi/o- 

 lopfc'vs 2»'u«i (Fab.), Grecnidea fidcola Takah., Tulierdachnvs vimikolis 

 (Fonst.), Lachmis Omjofdice Theob., Shivaphis cdti Diis, Astegopkri/c 

 Jtci Takah., Alcurodaphis Ihoneoe v. d. Goot, etc. 



(3) Caiitpondus {3Iijrmofudia) Jritdce Fowl \ar. muia Forel, attending 

 LadoMs thu/o/diai Tlieulj. 



