126 PSTCHE. [November— December iSSS. 



resented oiil\- by wingless males antl Flattened, long and narrow. Gen- 

 oviparous females, which abounded on eral color black, mottled with green 

 the under surface of the leaves. Many especially on thorax and abdomen, 

 pairs were mating, and niany of the fe- Head large, black, with a well devel- 

 males were laying eggs on the under oped frontal tubercle. Dorsum oftho- 

 surface of the leaves, especially along rax black with more or less green on 

 the midrib. The eggs were of the nor- margins. Dorsum of abdomen green- 

 mal form, light colored when first ex- ish black, more or less distinctly marked 

 truded and becoming dark on exposure. with black transverse patches, especi- 

 About a fortnight later when the plant ally posteriorly. Cornicles, legs and 

 had been killed by frost the aphides eyes black. Legs ver}- long with short 

 were abundant in the rubbish beneath stif^' hairs. Antennae long, robust, 

 the plant and some of them had pene- roughened with tubercles which are 

 trated the soil about the roots. Both quite large on basal joints, but smaller 

 forms were still abundant. A few had apically. Rostrum black, reaching 

 wandered to a neighboiing plant of cephalic margin of posterior coxae, 

 some species of Polygonum. Ventrum of thorax black, of abdomen 



I find wo mention of an}- aphid infest- green, 

 ing Amaraiitus albns in this country. Described from one living specimen 



and as the plant is supposed to be nat- taken in copula on Amarantus albus, 



uralized from the tropics it probabl}' 19 October 1SS7. 

 does not occur in Europe. In Lich- Oviparous fefuale. 



tenstein's* list of host-plants, in which Width of bod v . . .0.75 mm. 



are included all genera known to be Length of body .... 1.60 mm. 



infested by aphides. Amarantus is not " " antennae . . 0.50 mm. 



mentioned. Of course this species may " "cornicles. . . o.io mm. 



also occur on some other plant, but I ^°^^>' g^'^^"' ^^'^^^ powdery white 



have found nothing like it in extensive Aocculence, head dusky. Antennae 



and careful collecting this fall. But ^^^'''^^ '^''^'^ ^'"^^^^' ^^P^' '"ougbened by 



although it is probable that the species ^P^''^'^ '"'""^^ tubercles tipped with 



is undescribed I prefer to leave it im- ^"^ ^'^^^'^ '^'^'^"S- ^egs whitish, with 



named (at least until the other forms ''"^'^y ^^^^'^^^ ''^"^^ tarsi, and more or less 



can be obtained) rather than run the clusky on articulations ; somewhathairy. 



risk of uselesslv burdening the svnonv- Cornicles nearly color of body. Eyes 



my of the group. ^ " ^^'^'^''■. t'^""^ ''"^' "^ quadrangular 



-„. , , patch just in front on ventrum, dusky. 



W I useless tnale. V> " . , . . , ,, 



Rostrum not quite reaching middle 

 Width of body .... cco mm. i 1 . 1 i 



Length of body . . . . i.io mm. '^^^''^^ = dusky at base and apex. 



antennae . . 1.20 ram. Described from one living specimen 



taken /;/ copula on Amarantus albus.. 



cornicles . . . 0.08 mm. 



*Lespucerons, p. 76.140. 20 October 1SS7. 



