75 E. Takaha&hi 



(The first iiistar) Body nirrow, with raauy long bristles. Hiuci divided, 

 tlioiigh not distinctly so, with about 15 bristles on the dorsal surface. Eyes rather 

 large, distinctly protuberant. Antennae 4-jointed; the relative length of joints 

 about as follows: III-47, IV-28. Kostrum usually reaching far beyond i,he hind 

 coxae, but sometimes reaching only to the middle or hind coxae. Cornicles as in the 

 adult in shape. Cauda almost semicircular when seen from above. 



(The second instar) Antennae S-jointed; the relative length of joints about 

 as follows : III-4'\ IV-20, V-28. 



(TJie tliird instar) Antennae fi-jointcd; tiie ralative lengtli of joints about as 

 follows: III-37, IV-17, V-25, VI-30. Wing pads beginning to appear. 



(The fourth instar) The 4th autenual joint of either the winged or wingless 

 form ])rovidcd with a sensorium near tlie apex; the relative length of joints about as 

 follows: III-47, IV-'20, V 29, VI-35. Wing-pads well developed. 



The hairs on the head are variable in number. Each half of tiie dorsal sur- 

 face of tlio head is provided with from 8 to 11 liairs in the wingless adult and witli 

 about 10 in the winged form. Tlic wingless adult is furnished with a sensorium at 

 the apex of the 4t]i autenual joint and sometimes witli one at the apex of the ■"'ird also. 



Host.-Pinus sj), attacking the leaf. 



Distribution. -Formosa : Taihoku, Kagi, Koshun. 



Japan: Kyoto, Oita prefecture, Tokyo. 



This species is probaljly a synonym of E. thunhcrgii Wilson (Entom. News, 

 XXX, 1, p. 3, 1919). 



Aiceona osugii u. sp. 



(PL X, A, figs. 9-11 & PI. X, B. fig. 1 ) 



Wingless viviparous female. 



Yellowish green. Antennae and legs yellowish green. Eyes black? 



Body elongate oval, furnished witli many very long fine hairs. Head not 

 fused with the prothorax, almost twice as broad as long, not divided by a median 

 line on the dorsal surface. Frontal tubercles lacking. Eyes rudimentary, some- 

 times composed of a few facets, with the ocular tubercles distinctly protuberant, but 

 usually only the ocular tubercles are apparent. Antennae long, very slightly imbri- 

 cated, 6-jointed, provided with raauy very long haii-s; the 1st joint about as long as, but 

 stouter than, the 2nd; the 3rd and 4tli without sonsoria; the 5th with the apical senso- 

 rium lai"ge, circular, protuberant and not surrounded by a row of setae; tlie relative 

 length of joints alwut as follows: III-125, IV-58, V-56, VI -57(35 -|- 22). Rostrum 



