FOOD-PLANTS OF THE ARMY WORM. 11 



Umbelliferje. — Baucus carota. (Carrot.) 



The four larvae begun feeding on the second day ; all transformed ; 

 two died in the pupa state and the other two issued as moths. 

 UmbellifeRvE. — Pastinaca sativa. (Parsnip.) 



Of four larva?, one died before transforming, one in the pupa state, 

 and the other two issued as moths. 

 Composite.— Laetuca sativa. (Garden lettuce.) 



Of four larva?, one was destroyed by the others before they commenced 

 to eat ; the others all fed to full growth, transformed, and issued as 

 moths. 

 Che^opodiace.e. — Beta vulgaris. (Garden beet.) 



Of four larva?, after feeding slightly, three died after six days ; the 

 remaining one fed more extensively, transformed to pupa, and issued 

 as an apparently healthy moth. 

 Llliace^e. — Allium sativum. (Onion.) 



All fed ; two died as larva?, and the other two completed the round 

 and issued as moths. 

 Conifee^e. — Abies canadensis. (Hemlock.) 



All died without feeding. 



THE ARMY WORZU IN THE CRANBERRY BOGS OF NEW JERSEY. 



In June, 1882, there appeared on the Eockwood cranberry farm, near 

 Hammonton, N. J., an insect enemy which, according to the reports 

 received from Mr. Eockwood, first destroyed the rushes and afterwards 

 the young cranberry vines, thus doing considerable injury. Specimens 

 sent by Mr. Eockwood proved to be the larva? of a species of saw-fly, 

 which, however, in captivity refused to feed on the cranberry vines. 



The following correspondence on this subject explains itself: 



Hammonton, Atlantic County, New Jeksey. 



/«Ijr4,188S 



To the Entomologist, Agricultural Department : 



Sir: I send by this mail a box of worms which have done me great damage on * 

 cranterry bog. Some say that they are the Army Worm, bur they did not come as 

 an army. They are on several cranberry bogs around, but no one has seen them trav- 

 eling. They are first found on the bog, and are found of all sizes, from ± inch long to 

 1| inches, and appear to have been hatched where they are found. The young hare 

 only been seen on rushes in the ditches where water stands or was. The old* spread 

 over the bog, eating first in preference grass, and then attacking the vines. They eat 

 the new, tender growth. The young are transparent and greenish, the fall-grown 

 blackish. The large are active, moving rapidly. When touched they drop off the 

 Tines and curl up. They work toward evening and apparently in the night. They 

 were first Been about June '20. We have killed some with Paris green, but they seem 

 to be disappearing, even where no Paris green has been used. We find dead bodies 

 where Ave have not used the poison : but we still find tin 1 young and some old, although 

 not as many as a few days ago. Please tell me what you know about them. 

 Respectfully, 



(HAS. t;. ROCKWOOD. 



P. S.— We have been unable to find a grown one at the time of day we got those 1 

 send with this. They seem to touch nothing but grass ami cranberry yin< - 



