A)>hitlittae of Formosa 4. 30 



the 1st. 



Length of body — about 4.5 mm. Antenna — about 1.8 mm. 



Fore wing — about 5.25 mm. Hind tibia — about 3.25 mm. 



Hairs on the body of the winged form longer and more slender than those 

 of the apterous form. 



Host. — Vinus sp. 



Distribution. — Formosa : Sakuragamine (altitude about 8000 feet) in Taichu- 

 prefecture. 



Some apterous ami a winged viviparous females were collected by the 

 author on May 20, 1924. 



In tlw specimens treated with caustic potash, some small dusky spots are 

 visible on the dorsum. These spots are groups of very small wax-pores which 

 are rather irregular in shape. Each group is composed of about from 10 to 20 

 wax-pores. 



Dilachnus taiwanus u. sp. 



Wingless viviparous female 



Blackish brown, shining, not covered with white wax. In specimens 

 treated with caustic potash, body with some small dusky spots on the dorsum, 

 antennae dusky at the apex id' the 5th joint and on the Gth, femora dusky on 

 the distal hall', tibiae black, brownish on the portion near the base, tarsi black, 

 cornicles, Cauda and anal plate almost blackish brown. 



Body oval, covered with many long line hairs. Head divided, with many 

 long line hairs which are not erect, longer than the 1st antenna! joint. Eyes 

 witli small ocular tubercle:-. Antennae rather slender, with many long line hairs 

 which are not erect, almost as lone- as those on the head; the 3rd and 4th 

 joints without sensoria ; the 4th almost as long as the hair on the antenna; the 

 5th with the apical sensorium very large; the (jth with about l! sensoria near 

 tin 1 primary one; the relative length of joints about as follows: III-110, IV-40, 

 V-53, VT-48. Rostrum slender, reaching a little beyond the hind coxae. Cornicles 

 mi conspicuous hairy cones. Cauda broadly rounded, with many long stout 

 bristles. AanI plate larger than the cauda. with many long stout bristles. 



Legs long and rather stout, covered with many very long fine hairs ; tibiae 

 much stouter than the antenna, front tibiae slightly shorter than the antenna: 

 hind tarsi shorter than the 3rd, but longer than the ."ith antenna! joint, the 2nd 



