3 1 
etati«»ii point.' As a result the stalk jjrows no further, the youiig^est 
interuoihs remain shoit. and, in consequence, their leaves stand ch)se 
to^i'ther, tbrininj; a sort of Ian. Moreover, four to six eyes of the stalk 
j^row out. <>fteii these youn*.! lateral shoots all die, as well as the old 
stalk. 
The e^<4s an* \ ery otten infested by Crrttjthroti hmcficit its /ehnt. 
<1II1.<) INFISCATKLLUS, SNELL. 
As a rule this borj-r lays its e^ji's in <'lusters on the under surface and 
near tlie base of the leaves, althou<,^h sometimes they are laid on the 
upper side and then almost always just on the midrib. They resemble 
very much those of hiatraa str'mlalis, but are a little smaller and ordi- 
narily arran«^ed in three to live rows. ()tten one linds 
ob to To toji:etber, and the total number ])roduced ])y one 
fennile is from 1^)0 to -40. 
The larva' hatch after ei^ht days and are about li""" 
lon^. They, as well as the full-^nown larva*, are li<:;:ht yel- 
low and have live reddish b)n{^itudinal stripes on the back. 
(In I>i((tr<t(( stri((t((lis tlie freshly hatched Iar\a* have, 
besides other diflerences, a transrer.se strii)e on each ab- 
dominal se«;ment and the full-^rown larva has but four 
hn((/itu(Jinal stripes, tin* median oneof Chilo being absent. 
The young" larva* penetrate in and between the sheaths 
of the leaves of young shoots. There they rest until they 
have molted four times and then i)enetrate transversely 
and a little al>ove the vegetation point. Tpon reaching 
the center the tunnel is directed in a straight line down- 
ward. Mere the heart of the siioot is eaten out, and linally 
the stalk is attacked and its vegetation point destroyed, 
so that the growth of the shoot becomes impossible. In 
one shoot one linds often three to live borers. 
When the larva is full grown it makes a horizontal 
gallery above the vegetation point, /. e. through the sheaths of the 
leaves. The dust is then removed — partly downward. i)artly ui)ward. 
Thereupon the larva i)upates and the i)upa lies anywhere in the ver 
tical gallery in which it is able to move itself. 
The whole develoi)ment is accomplished within the following ])eriods: 
yj^^ig state, 7 to S days; larval state, .'>S to 4i* days: ])npal state. 7 to 8 
days; total, 51* to oS days. 
(JIJAIMIOLITIIA SCIIISTArKANA, SNELL. 
Yic. U.-Chilo in 
/imcateUim, lull 
Krowii larva — 
I'lilargi'tl (aftrr 
Zfhiitnt'i-). 
This insect lays its eggs in a single or double row (Ui the leaves and 
on the sheaths iA' young shoots. They also much resemble those of 
JJiatraa striatalis, but are considerably smaller and very diflicult to 
' hi (lennaii: \'«-i;etati()nsimnkt. Ve.uetationsspit/.e. 
