
25 
enemy of tobacco in Bessarabia. It occurs upon many plants in this 
country, but has never been found upon tobacco, although in south- 
ern Russia it at one time caused much 
damage to the leaves, puncturing 
them and causing them to wilt. As 
this insect, occurring in this country 
as it does from the Atlantic to the 
Pacific, may at any time be found 
upon tobacco, it is worthy of mention 
and of an illustration in this connec- 
tion. It is shown at fig. 21. 
The “white fly” of tobacco (Aley- 
rodes tabaci Gennadius).—One of the 
insects especially noticeable in Eu- 
rope is a minute form which looks 
like a small seale insect on the under 
side of the leaf. Its damage to to- 
baecoin Greece was demonstrated by 
Professor Gennadius in 1889. <A 
closely allied or ideutical species oc- 

Fig. 20.—Mamestra legitima: a, adult; b, 
curs upon tomato in this country, but larva from above; c,same from side; d, 
: ‘ head of same from front; e, pupa—all 
European specimens from tobacco natural size except d, which is enlarged 
have not been compared with our to- (original). 
mato species, so that we can not speak 
positively as to their identity. The tomato species is, however, liable 
to be found upon tobacco. 
Tree crickets (Oecanthus fasciatus).—Young tree crickets are occa- 
sionally found upon tobacco, eating the leaves to some slight extent. 
They do no especial damage, but are worth mentioning in this con- 
nection. The greatest damage done by tree crickets is occasioned by 
the punctures in the stems of plants like raspberry and blackberry, 
which are made by the females in laying their eggs. So far as known, 
they have not been observed to puncture tobacco for this purpose. 
In portions of Maryland these 
little insects are known as 

oF 
o 
AN ite 
“i= 
“3h ( : ‘‘chatteracks,” presumably 
a Sol from the song of the male. 
CF gg SN ANN ’ = 
UN Foe“ | 2 
ah as s\ iN SW 6 Themealy bug (Dactylopius 
WN = 9 ee 
THUMM mn = | XW \ citri Risso).—In the course of 
= greenhouse observations on 
= 
tobaeeco plants at Washing- 
Fia@.21.—Thrips tabaci; a, adult; b, antenna of same; ton Citv it has been found 
ec, young larva; d, full grown larva—enlarged v 
(original). that the common mealy bug 
thrives and multiplies alarm- 
ingly upon tobacco plants. Since this mealy bug is an outdoor pest 
of many plants in the South, it seems from this experience that it has 
