Aphidiilae of Formosa. — 3. 69 



Antennae 6-joiuted; tho relative length of _'oints about as follows: III-25, 

 IV-18, V-'-l, YI-29 (22 + 7). Wing-pads beginning to appear in the uyiupii of 

 winged form. Body about 1.15 mm. in length. 



(The 4th instar) Diflers from the 3rd in the following characters: 



Wing-pads well developed in the winged form. Body about 1.25 mm. in 

 length. 



The relative length of autennal joints about as follows: III-u5, IV-23, 

 V-26, VI-34 (25+9). 



It is remarkable that the 3rd iind 4tli iustars of the wingless form ai'e scarcely 

 distinguishable except by the relative size of the body. 



In the 1st instar the first pair of groups of wax-pores on tho dorsal surfiicc of 

 the head is rather distinctly protuberant and situated on the front. The 1st instar 

 nymph is not covered with cottony secretions, but the 2nd, 3rd and 4th are densely 

 so pi'ovided. 



Neophyllaphis podocarpi Takah. 

 (PI. Ill, B, figs. 6-9) 



Aphididac of Formosa-1, p. 77 (1921) and ibid.-2, p. 129 (1923). 

 Nymph of viviparous female. 

 Key to instars. 

 ( 1 ) Antennae 4-jointed The 1st instar. 



Antennae 5-jointed. The 2nd instar. 



Antennae 6-joiutad (2) 



( 2 ) The 3rd antennal joint almost as long as the 6th, or the ^ving-pads beginning 

 to appear The 3rd instar. 



The 3rd antennal joint longer than the 6th; wing-pads well 



developed Tho 4th instar. 



(The first inst:ir) Pink, somewhat yellowish on the head. Eyes dark red to 

 almost blackish. Antennae almost colourless, very slightly dusky at the apices, 

 Legs almost colourless, very slightly dusky on the tarsi. Cauda pale yellowish. 

 Body oblong, broadest at midleugth, a little more than twice as long as wide, some- 

 what flattened, soft, very slightly covered with a powder, about 2.5 times as long 

 as the antenna. Head largo, divided, somewhat protruding on the front between 

 the antennae, provided with a few long bristles on the front. Frontal tubercles 

 lacking. Eyes composed of 3 facets. Antennae very short, 4-jointed, not imbri- 

 cated; the basal two joints each with a long bristle; the 3rd very slightly more 



