19 

found by Professor Garman wilting plants in an experimental plat of 
tobacco at the Kentucky Agricultural Experiment Station in the sum- 
mer of 1896, and which is 
suspected to have done more 
or less damage over quite a 
wide extent of country that 
season. 
An interesting little bug 
of the family Scutelleride, 
viz, Corimelena extensa 
Uhl., has been found dam- 
aging native tobacco at 
Cedar Ranch, Ariz., by Se ae ea 
Prof. C. H. T. Townsend. Fic. or aa cee Gas left; adult 
It is reported to be the only 
member of its family which lives upon tobacco, and as Professor 
Townsend found it to be very abundant, it is probably an important 
future enemy to the tobacco crop, especially if tobacco culture increases 
in the Southwest. 

THE TOBACCO LEAF-MINER, OR “SPLIT WORM.” 
(Gelechia solanella* Boisd. ) 
This insect, which is also comparatively new in this country as a 
tobacco insect, was first brought to the writer’s attention as an enemy 
to this plant early in 1896 by Prof. Gerald McCarthy, formerly of the 
North Carolina experiment station. The adult insect is a minute, 
grayish moth, shown in fig. 14. Its eggs are laid upon the leaves, 
and the minute caterpillar 
bores between the surfaces 
of the leaf, making a flat 
mine, often of consider- 
able size, with a gray dis- 
coloration visible from 
both sides of the leaf. 
Frequently there is a dis- 
tortion when the mine 0oe- 
curs near a large vein, as 
shown in fig. 15. There 
are two or more genera- 

Fig. 14.—Tobacco split worm: adult moth above; larva 
below at right; pupa below at left, with side view of tions in the course of the 
enlarged anal segment—all enlarged (original). summer, and the insect is 
more noticeable in the autumn than at an earlier date. Down to the 
year 1898 the insect was known to occur as a tobacco insect in this 
country in North Carolina only, the exact locality not having been given 
tous by Professor McCarthy, nor did he mention it in the little account 
of the insect which was published in Bulletin No. 141, of the North 


' * Since the publication of the original article this insect has been found to be Zeller’s Gelechia 
operculella, the type having been received from Texas. 
