2,S K. Tiikuliusiii 



(PI. yil, A, Fig. 2-5) 

 Aphididae of Formosa 2, p].. 24 mid »1 (H»2;)). 



N.vnii>li of vivi]>aroiis female. 



Kt'V to instars. 



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



Antennae 5 or 6-jointed ( 2 ) 



( 2 ) Antennae 5-jointod ( 3 ) 



Antennae 6-jointed < 4 ) 



( 3 ) Tlic 3rd antennal joint aliout 2.3 times as long as the l>asal 



\mrt of the 5tii 'Die 2nd iii.star. 



'J'he 3rd antenna! joinl more than 3 times as long as the 



basal part of tlie 5th The 3rd instar. 



( 4 ) The 3rd antenual joint somewjiat longer than the 4tli, al>out 



twiee as long as the lusal p.irt of the Oth. The 3rd instar. 



The 3rd antennal joint mueh longer than the 4tb, more than 



twice as long as the lusal part of the Gth The 4th instar. 



The antennae of the 3rd instar are usually only 5-jointed as in tlie 2nd instar, 

 I)mI are rarely 6-jointed. In tlic 4th instar the 3rd and 4tii antennal joints are 

 sometimes poarly defined. 



(The fii'st instar; Pal(! yellowish green. Eyes dark reddish hrowii. Antennae 

 ]iale greenisli, dusky du the last joint. Cornieles ]iale greenish, dusky on the apieal 

 part. Cauda ]>Ue greeni^ili. Legs i>ale greenish, dusky on the I arsi. liody a little 

 more than twiee as long as wide. 



Head inovided with a few rather long stout bristles. Frontal tubercles very 

 sliort, but distinctly gibbous on tlie inner side. Eyi^s somewiiat ])rotrnding, without 

 ocular tuboreles. Antennae almost as long as the liody, 4-'oiuled, imbricated, 

 providc<l with a fi'W stmit bristh's of moderate length; the 1st joint somewhat convex 

 on llie inner side; the 3rd |udvide(l with aiiout 2 bristles near the a|)e.\, the senso- 

 riuni rather small; the relative length of joints about as foUows: 111 i)?, IV-73 

 (134-60). Rostrum rea-liing a little l)eyond th(; mi<KUe coxae. Abdomen with a 

 few sJiort hairs. 



Cornicles short, rather stout, broadest at the base, very sliglithy ta])ering, not 

 expanded at the base as in the adult, scarcely or not curved, imbricated, not reticu- 

 lated as in the adult, aliout twice as long as wi<le, longer than the base of the last 

 antennal joint. Cauda very short, broadly rounded, with 2 bristles. Legs stout; 



