STATE AGRICULTURAL SOCIETY. 
513 
Winged fomalo. 
CABBAGE APHIS. WINGED FEMALE FLY. nEMEDV. TOBACCO SMOKE. 
neck. The antennae are also black, with the third joint dull yel¬ 
lowish. The body is plump, large and unwieldy in its aspect, 
with the breathing pores, and several dots on the back, black, and 
on the hinder part some vague blackish transverse streaks. The 
honey-tubes are short and black, as are the legs also, the base of 
the thighs being pale greenish. 
The winged individuals, Mr. Curtis takes it for granted, are 
males, but they certainly are, at least for the most part, females, 
and show the end of the ovipositor slightly projecting like a tail 
at the tip of the body. 
These winged^ females , represented in 
the cut, Fig. 9, the lower figuro showing 
the natural size, measure 0.075 in 
length to the tip of the abdomen, and 0.14 
to tho end of the closed wings, and their 
width from tip to tip of the extended wings 
is 0.18. They are of a dull greenish color, 
varying to palo dull yellowish, and largely 
varied with black. Tho head, neck and foro- 
body on its upper side are black and shining. 
The horns or antennto are two-thirds the 
length of the body, more slender towards 
their tips, and black. On the neck, one or 
two palo yellowish bauds are somotimos poroeptiblo. Tho hind body is usually pale 
green, with dark groou or black bands on the back, which are often narrowed or somewhat 
broken asunder in tho middle and have ono or two dots or small spots at their outer ends 
in a longitudinal row; the honey-tubos scarcely equal the distanoe to the tip and are black 
with their bases palo yellowish. Tho legs are black with tho basal half of tho shanks and 
of tho thighs palo yellowish. Tho wings are hyaline and iridescent, their stigma palo 
greenish and their veins black or dark brown. Tho distance between tho first and second 
veins at tlioir base, is a little more than half that between them at their tips; third vein 
further from tho second at the tip than at tho base, and a little nearer to tho second at 
the base than tho second is to the first; first fork a little nearer to the second fork than to 
the third vein, and a little nearer to the third vein than tho third is to tho second; second 
fork very little nearer to tho fourth vein than to tho first fork; fourth vein slightly curved 
and very littlo nearer to tho second fork than to tho tip of tho rib-vein. 
Usually these plant-lice are not present upon the cabbages or 
turnips in such numbers as to occasion any anxiety. Their natural 
destroyers ordinarily suffice to keep them in check. But when, as 
m the case of Mr. Edgerton, they throng the vegetation in such 
hosts as to threaten its ruin, I should drive short stakes among 
the cabbages or turnips and spread a sheet, a large piece of can¬ 
vass or old carpeting over as many plants as the cloth would cover, 
and burn tobacco in cups here and there underneath, till I was 
certain the smoke had tilled the whole space. Hereby every aphis 
vould instantly be smothered. I should then remove tho cloth 
:uul wiLl1 clean water from a watering pot wash the plants 
[Ag.] 33 
