New York AGrRicuttuRAL Exprrmuant STATION. Wl 
The moth is rarely seen except when frightened from its hiding 
place. 
The four wings have a white or yellowish white wavy band on 
the hind margin. When seen at rest these bands are united 
along the back so as to form three diamond-shaped spots. The 
hind wings are fringed with long hairs. It probably passes the 
winter in the pupa and adult stages. 
Parasites. In this country entomologists have bred seven 
species of parasites from this insect. The most common one 
found here the past fall was Lemneria tibiator Cr.* Apparently 
it does not sting the larva until the latter has spun its cocoon.. 
After devouring the larva of the Plutella the larva of the 
parasite spins a paper like cocoon within its host. As late as 
November 27 it was almost impossible to find cocoons of 
Plutella that were not parasitized, besides, the adult parasites 
were still active at that date. 
PartIaAL BIBLIOGRAPHY AND SYNONYMY. 
Cerastoma brassicella, Frrcu: First Report on Noxious, Benelicial 
and Other Insects of N. Y., 1855, pp. 170-175. 
Cerastoma xylostella, Curtis: Farm Insects, 1870, p. 85, by John 
PGS. 1. 5., ete. | 
Oerastoma xylostella, Lu Baron, in “ Prairie Farmer,” Oct. 8 
1870, p. 314. 
Plutella xylostella, Linn.: Report on Rocky Mt. Locust and 
Other Insects, Dept. of Inter., U. S. Geol. Survey, 1877, 
“pp. 751, 752, A. 8. Packard. 
Plutella cruciferarum, Zeri.: Seventh Report Ill. State Entomol 
ogist, C. Thomas, 15838, Part II, French, p. 267. 
Plutella cruciferarum, Zuri.: U. 8. Dept. Agr. Div. Ent. Bull. 
No. 14, 1886, p. 12, Ashmead. 
Plutelia cruciferarum, Zeu.: Bull. No. 12, Hatch Exp. Sta., 
Mass., 1891, pp. 30, 31, C. H. Fernald. 
Plutella cruciferarum, Zeri: Bull. No. 18, lowa Agrl. Exp. 
_  Sta., 1892, pp. 514-516, Osborn and Gossard. 
Plutella cruciferarum, Zeiu.: Bull. No. 24, Colo. Agrl. Exp. Sta., 
1893, pp. 9, 10, Gillette. 

* Kindly determined for me by L. O. Howard, United States Entomologist, 
