mt'SM 
37 
around the inside cavity is rather characteristic, so much as 
readily recognized after a little observation. I have found a 
5 grass worked in by another species of an allied insect, 
le manner of work is so different as to be unmistakable. 
a elymi makes a cavity on the inside of Elymus canadensis that 
f e nearly like that made by I. tritici in the wheat, but they 
somewhat. 
be fields I have found specimens of E. allynii emerged from 
ipa skin, but still inside the cavity of the stem; others with 
)le by which they expected to emerge gnawed so that they 
almost get out, and they still there with the body protruding, 
bhers when they had gone, the clean-cut hole indicating where 
had obtained their freedom. I have bred many specimens 
the straws after they had been collected, and the conditions 
-he same as those in the field, the inside of the stems in all 
being examined before putting them into the breeding jar. 
m these facts I do not see how I could avoid the conclusion 
Eupelmus allynii was a parasite on the two species of Isosoma.” 
10 description of this important parasite has yet appeared in 
ports of this office, the original specific description of Prof, 
i, published in the Canadian Entomologist for January, 1883, 
3 appended, accompanied by an original figure. 
Enpelmus allyni, French. 
Order Hymenoptera. Family Chalcidid^e. 
(Plate I. Fig. G.) 
DESCRIPTION. 
‘ ale .—Average length, .10 of an inch. Color of body and an- 
! uniform black, the first with a slight greenish luster. Head 
' .025 of an inch wide, about two thirds as long; the antennae 
3 enlarged at the ends, hairy; microscopic hairs moderately 
*ed over the head and thorax. Thorax, as well as head, 
ired; wings hyaline, dotted over with microscopic hairs, the 
in its widest part about the width of the head. Abdomen 
illy tapering from near the base, the ovipositor slightly ex- 
* color of the legs vary slightly; in five specimens the anterior 
isterior legs have the femur fuscous except at the ends; the 
vith basal half fuscous, the rest yellow; the middle pair of 
p yellow throughout, except the terminal tarsi. Two speci- 
have all the femurs fuscous, yellow at the ends. One speci- 
as all the femurs pale red, and the tibiae fuscous, but this is 
ly a change from yellow by the poison bottle used in killing. 
marked like the first five, with the yellow replaced by pale 
notlier is like the first five, except that the middle tibiae are 
s clouded at base. 
—In this sex the body, wings and antennae are colored like 
nales, but the antennae are a little more slender at their ends, 
cad and thorax have about the same measurements, but the 
