703 
INSECTS. HEMIPTERA. 67. Aphis. 
The minute animals which compofe this lingular genus, infeft 
various plants, generally in large focieties, hindering their 
growth and confuming their jucies : they are fometimes win- 
ged and fometimes apterous, without any dillinftion of fcx r 
in the fpring they are viviparous, producing the young alive ; 
in the autumn they are oviparous j and by a furpriling aber- 
ration from the common laws of nature, it appears that one 
impregnation of the female is fufficient for many fucceffive 
generations, without the farther affiftance of the male. 
Cinereous ; fnout thrice as long as the body. 
Inhabits Drefden under the bark of trees, and preys on the larva 
of ants : middle-lized. 
On the (talks of the Lichnis dioeca. - 
Mody black : margin of the abdomen plaited : legs paler ; joints 
black. 
Vsar. 
On the Salix caprea. 
Small ; green, paler at the lides : eyes, antennce and tips of the 
kgs black .• abdomen pointed. 
On the branches of the Sambucus niger. 
Large, black, the margin each fide with 3 white ftreaks ; bafe of 
the abdomen with a fmall dot each fide and a fingle one near 
the tail. 
On the (talks of the SollJago virga-aurea. 
Body brown ; front emarginate ; horns fetaceous twice as long 
as the ftyle: % pale, the joints black; t\\z young are teftacc- 
ous. 
On the leaves of the Pranus cerafus. 
Glofly -black : middle ot the antenna andjhatiks pale. 
On the diftorted leaves of the Ribes ruber. 
Rcautn. Inf. l.tab. 22. fig. 7, to. Frijk. ll. tab. 14. , 
Body glabrous green ; eyes black : antenna as long as the body 
and kgs brown .• tail obtufe. 
On the leaves of the Arundo epigejos. 
Body green : heati and thorax brown covered with white down , 
antenna and /r^r piccous : unarmed. 
* Burjana. 
