88 E. Takaliarfii 



Cornioles on liairy oones, large, of Latdinid-aiipcarance, eaoli fiouo being 

 provided witii from 10-14 long bristles. Cauda very sliort, not coustritited, pro- 

 vided with some bristles. Anal plate not bilolcd. Legs slender, tibiae ]>rovided 

 with some very long bristles; tarsi not imbricated: liind tarsi almost as long rs the 

 4th antennal joint. 



Length of lx)dy-al)o«t 2.0 mm. 



(Wingless form) 

 Key to instare. 



( 1 ) The 3rd antennal joint almost as long as the 4th (2) 



The 3rd antennal joint muoh longer than the 4tli The 3rd instar. 



( 2 ) Horns on tlie head ratlier pointed at the apex The 1st instar. 



^ Horns rather rounded at tlie tip The 2nd instar. 



The Ist instar is like tliat of the winge<l form. The 2nd: Body largor, witli 

 the liornB on tlie head rather rounded at the tip; the 3rd antennal joint almost as 

 long as, or very slightly longer than, the 4th. The 3rd or full grown nymph: 

 Body larger; horn? longer than those of tlie 2nd instar, with the apox roiuidod as in 

 tlie adnlt; tlie ?rd antennal joint much longer tlian the 4tli. 

 WiugU«B viviiMirous female (adult ). 

 A-Dtennae 4 or 5-jointed. Cornieles situated on cones which arc provided 

 wjtii alwut 12 long bristlrs. 



In Oregmo bamhimcola Takali., the horns on the Iiead of the young nymph 

 are much longer than those of the adult of the wingless viviparous female, but in 

 0. hrnnhmtfoliae Talvah., thoge of the nymph ere shorter tlian those of the wingless 

 adult. 



In Q. hambusi/ol'iae Takali., as in other sjwcies of Ch'cgiim, the horns of the 

 winged adult are much snmller than those of the nymiih. These descriptions were 

 made from specimens collected in April and May, 1923, near Taihoku. 



The cornicles of O. hamhnsicola Takah., O. pmiicola Tokah., 0. nwutmia v. d. 

 Goot, 0. hmif/ern Zohnt. and 0. oricntalix Takah. are not situated on hairy cones, 

 uiilike those of 0. hamhunifoUae Takah. Many wingless viviparous females of 

 0, ba7)ihmi/oli'ae were observed in November 1923, at Kuraru, Kosluin, Heko and 

 Ki^an, Formosa. 



Or^ma formosana n. sp. 



(PI. X, B, figs. 9-10) 

 Wingless viviparous female 



