THE CANADIAN ENTOMOLOGIST. 41 
result in the destruction of the whole crop, in places where the 
infestation is as severe as in the Truro district. Furthermore, it 
would ha\-e little permanent effect where the pest is so numerous 
on neighbouring wild plants. As for destroying the wild plants 
that harbour the insects, these are much too numerous to commend 
the method to the practical farmer. 
References. 
The following are the most important references to the work 
of this insect: — ■ 
Bethune, C. J. S. Depressaria Ontariella, n. sp. (N. sp. = hera- 
cliana DeG.) Can. Ent., Vol. II, No. 1, Aug. 1869. 
Cook, A. J. Rep. of Zoologist, 3rd Ann. Rep. Mich. Agri. Exp. Sta. 
1890; 112-115, 4 figs. 
Cook, A. J. Two Insect Pests New to Michigan. 19th Ann. Rep. 
Seer. St. Board Agri. Mich, for- 1880; 275-278. 
Riley, C. V. The Parsnip Webworm. Insect Life, Vol. I; 94-98. 
Riley, C. V. The Parsnip Webworm. Orange Judd Farmer,5l7, 
Nov. 1888; 319. 
Southwich, E. B. The Parsnip Webworm. Insect Life, Vol. V' 
Aug. 1892; 106-108. 
Harrison, J. W. H. An Unusual Parsnip Pest. Entomologist, 46 
(1913), No. 597; 58-59. 
Explanation of Plate II. 
1. Eggs in place on sheath (insert, single egg greatly enlarged). 
2. Larva, lateral aspect; stem cut longitudinally showing larva 
spinning cocoon. 
4. Pupae, ventral and dorsal aspect. 
5. Stem cut longitudinally, showing cocoon and pupae in situ. 
6. Adult moth. 
7. Flower head webbed up by larvae. 
8. Holes made by larvae in stem of Cow Parsnip. 
