41 
In addition to the foregoing minute species, the following large 
Ichneumon-fly has been bred from the Army-worm. This species, 
instead of piercing the worm and depositing its eggs in the body, 
as do the other species described, attaches them by a slender pe¬ 
duncle. The grub, soon after it is hatched, works its way into the 
interior of the body. 
Ophion purgatus. Say. 
“Body pale honey yellow, somewhat sericeous; antennae rather 
longer than the body; orbits yellow, dilated before, so as to occupy 
the greater part of the hypostoma; ocelli, large, prominent, wings 
hyaline; stigma slender; first cubital cellule, with two opaque, sub- 
triangular spots; no areolet; metathorax with a single, raised, rec¬ 
tilinear, transverse line near the base. Length 7-10 of an inch.” 
The following species has also been reared in considerable num¬ 
bers from the Army-worm: 
i Ichneumon suturalis. Say. 
Ferruginous; scutel yellow; sutures black. 
Body pale ferruginous; antennae black beyond the middle; trunk 
with black sutures; scutel more or less tinged with yellow; wings 
tinged with ferruginous ; carpus yellowish ; nervures blackish ; central 
cellule pentangular, the side on the radial cellule rather smallest, 
basal and apical sides longest, not parallel; metathorax with slightly 
elevated lines in the form of an h ; tergum with the apical sutures 
not black; basal segment with two slightly elevated longitudinal 
lines ; tibae—posterior pair black at tip ; venter—basal segment black; 
sutures not black; oviduct not longer than the breadth of the anal 
segment. (Say.) 
Flint’s edition of Harris’ work mentions and figures two species 
of Ichneumon flies which prey upon the Army-worm, but does not 
name or describe them. 
Besides these valuable aids in keeping this pest in check, several 
predaceous beetles have been observed feeding upon them. Prof. 
Riley mentions ten which have been detected at this good work, as 
follows: 
Cicinclela repanda, Dej. 
Calosoma externum, Say. 
Calosoma ccdidum, Fabr. 
Pasimachus elongatus, Hec. 
Harpalus caliginosus, Fabr. 
Elaphrus ruscarius, Say. 
Calosoma scrutator, Fabr. 
Colosoma wilcoxii, Hec. 
Amara angustata, Say. 
Harpalus pennsylvanicus, Beg. 
Among the feathered tribes the Rice Bunting, Bobolink or White¬ 
winged Black-bird (Dolichonyx oryzivorus) is perhaps the most val¬ 
uable aid in destroying these worms. So common an occurrence 
was it in past years for ‘this bird to appear in flocks in Army- 
worm years in Southern Illinois, that it received the name among 
the people of that section of the “Army-worm bird.” Other birds 
and domestic fowls also eat them with avidity. 
I have observed hogs following them across open places and de¬ 
vouring great numbers. 
But the numbers thus killed are, after all, small compared with 
the number destroyed by parasites. 
