Aphiilklae of Formosa — 4. 53 



Formosaphis micheliae n. sp. 



(PL IV, B, tigs. 1-4) 



Winged viviparous female 



Yellow. Head, eves, antennae and thorax black. Wings somewhat dusky ; 

 stigma and veins blackish. Body oblong. Head divided, provided with some 

 very short hairs, without wax-plates. Eyes large, not distinctly protruding, with 

 the ocular tubercles very small. Frontal tubercles absent. Antennae short, stout, 

 5-jointed, without hairs; the 3rd joint almost as long as the basal 2 joints taken 

 together: a very large sensory area which is reticulated present on each of the 

 3rd, 4lh and 5th joints; the relative length of joints about as follows: 111-35, 

 IV-40, V-45. Rostrum almost reaching the hind coxae. Fore wings with the 

 3rd oblique not branched, the 1st and 2nd obliques almost united at their bases, 

 stigma not elongate : hind wings with 2 obliques which are united at their bases. 

 Abdomen furnished with some wax-plates, from each of which a rather long 

 bristle arises. Cornicles absent. Cauda not distinct, Anal plate large, rounded, 

 with some rather long bristles. Legs moderately long ; femora almost as stout 

 as or more so than the antenna; tibiae slender, with many moderately long- 

 setae, furnished with a few short spine-like setae at the apex; tarsi not imbricated; 

 hind tarsi slightly shorter than the 3rd antennal joint. 



Length of body — about 2.5 mm. Antenna — about 0.75 mm. 



Metanotum with a pair of small subcircular wax-plates ?. 



Full-grown nymph of winged viviparous female 

 Body furnished with a few rather long bristles on the dorsum. Eyes of 

 numerous facets, not protuberant, with small ocular tubercles. Antennae large, 

 very stout, 5-jointed, without liairs ; the 4th joint with a very small circular 

 sensorium; the 5th with a somewhat larger oval sensorium: the relative length 

 of joints as follows: 111-25, IV-31, V-41. Rostrum reaching the hind coxae. 

 Abdomen with a wax-plate on the side of each of the 3rd and 7th segments, 

 4 wax-plates arranged in a transverse row on the dorsum of each of the 4th, 

 5th and 6th segments ; these wax-plates rather large, subcircular or oval, and a 

 rather long bristle arises from each; the 7th segment with a small blunt tubercle 

 on the side. Cornicles absent. 



Length of body — about 2.0 mm. 



