THE TIMOTHY STEM-BORER. 3 
DESCRIPTION OF THE DIFFERENT STAGES. 
THE EGG. 
(Fig. 2.) 
Length 0.65 mm., diameter near center 0.16 mm. Color milky white. Acuminate- 
ovate, apparently smooth; one side convex and the other slightly concave; large end 
broadly rounded, small end acutely rounded. 
Described from specimens dissected from 
eravid females. 

THE LARVA. 
(Fig. 3, a.) Fia. 2.—The timothy stem- 
: 3 borer: Egg. Highly magni- 
Length 6 mm., diameter 0.875 mm. Color varying fied. (Original.) 
from creamy to white, shading into a very faint tinge of 
salmon near center. None of the segments appears to be corneous, although each 
bears a number of sete; last segment feebly bifid, ending in a two-pointed spear, 
and covered with stout bristles. Dorsal surface of abdomen with six pairs of fleshy 
tubercles which. will be described 
later. 
Head (fig. 3, 6) narrower than 
thorax and arranged almost ver- 
tically with reference to it; ovoid, 
smooth, and bearing a number 
of large and small sete, a very 
faint suture extending from the 
occipital area almost to the episto- 
mal area. 
Antennx represented by two 
fleshy tubercles, situated laterad 
of and near insertion of mandi- 
bles; somewhat cone-shaped and 
bearing several small setze on their 
summits. 
Eyes represented by two tiny, 
slightly fused black dots situated 
slightly ventro-laterad of the an- 
tenne. 
Epistoma sublunate; anterior 
margin concave and posterior con- 
vex; about twice as broad as long 
and apparently inclosed by base of 

Fia. 3.—The timothy stem-borer: a, Larva, lateral view; wwandibles and achitinous ridge ex- 
b, head of same, dorsal view; c, maxilla and labium of 
same; d, mandible of same. a, Greatly enlarged; b, d, tending from insertion of mandibles 
more enlarged; c, still more enlarged. (Original.) almost entirely across the face; ridge 
amber-colored. 
Labrum tonguelike, lying directly over the mandibles, rectangular, longer than 
broad; distal margin rounded and densely fringed with sete or bristles; upper 
surface pappose; two large sete near center ana two on each lateral margin; six 
smaller ones on distal margin. 
°5 
