42 
have spread to the Atlantic seaboard, the former occurring- in North 
Carolina, and the latter in South Carolina. Neither (so far as records 
show) has invaded Colorado. 
ECONOMIC LITERATURE. 
The first account that the writer finds of injury by this species in 
America is entitled "The Sugar-Beet Caterpillar," and was issued as 
Special Press Bulletin, dated August 19, 1899, of the Colorado Agri- 
cultural Experiment Station, C. P. Gillette being the author. Injury 
in the vicinity of Palestine, Grand Junction, and Fruita is specially 
mentioned, and some facts on the insect's occurrence are also given, 
the main portion of the bulletin, however, being devoted to the discus- 
sion of remedies. In Press Bulletin No. 3, from the same station and 
author, a similar account appears. 
During the same year also the writer mentioned furnished for Bul- 
letin No. 26, n. s., of the Division of Entomology, an account of this 
species and its occurrence during 1899, adding as localities infested 
Delta, Montrose, and Rocky ford. From this it appears that although 
beets were principally devoured, the caterpillars also attacked potato, 
which in some cases suffered badly, as also small fruit trees where 
beets were planted in orchards. 
In a report of the same writer (12th Report Agl. Expt. Sta. of Colo- 
rado for 1899-1900, p. 39) similar injury is cited, the estimate being 
made that two or three hundred acres of beets were completely ruined 
in three localities during August. The insect matured in enormous 
numbers, and was noted to be passing the winter as a moth. 
The same writer published in the 22d Annual Report of the State 
Board of Agriculture of Colorado some additional facts in regard to this 
insect's life economy (pp. 128-129). This account states that the species 
disappeared as suddenly in 1900 as it had appeared the preceding sea- 
son. Since parasitism was not especially noticeable, it was surmised 
that the insect failed, although for no assignable reason, to properly 
survive the winter. Three new food plants were added to the list 
previously furnished, including lambsquarter (Chenopodium), Russian 
thistle, and saltbush (Atriplex). Mr. E. D. Ball observed that the 
moths were flying abundantly about the middle of May; caterpillars 
began hatching the first week in June, and by the middle of that 
month were abundant. Their ravages were worst on earliest planted 
beets, late plantings suffering injury only when near weeds or patches 
of early beets. Thousands of the worms were seen migrating, and 
they were found to travel two or three feet a minute. 
In "The Economic Entomology of the Sugar Beet" (Bui. No. 60, 
Exp. Sta. Univ. 111.), by Messrs. Forbes and Hart, an account of this 
species also appears in which some new facts are given. These 
