38 
BIBLIOGRAPHY OF ECONOMIC ENTOMOLOGY. 
277. Comstock, J. H.—Continued. 
332; why active nectar glands in other species exist long after 
their utility has ceased, 332; use of glands of cow-pea, 332; 
habits of bees, wasps, ants, and humming-birds in A'isiting 
nectar-secreting plants, 333; brief summary bibliography, espe¬ 
cially of articles written in the English language, 333. 
Appendices. 
Appendix 1. 347 
Reports of special agents and local observers: 
Report of E. A. Schwarz, of Washington, D. C. 347 
Report of A. R. Grote, of Buffalo, N. Y.. 351 
Report of E. H. Anderson, M. D., of Kirkwood, Miss. 352 
Report of Judge W. J. Jones, of Virginia Point, Tex... 356 
Report of Prof. J. E. Willet, of Macon, Ga. 358 
Report of William Trelease, of Brooklyn, N. Y. 361 
ArPENDix II. 380 
Answers of correspondents to the 1878 circular: 
Earliest year in which cotton was first grown, 380; earliest year in 
which the worm was seen, 384; years of unusual abundance, 388 ; 
effects of weather on the insect, 391; character of seasons most 
favorable to its increase, 394; character of summer and winter 
preceding severe worm years, 397; do wet summers favor its mul¬ 
tiplication? 400; effect of weather upon the eggs, 402; effect of 
weather upon the moths, 404; month of year when greatest 
injury is done, 406; statistics of losses during notable worm 
years, 409; prevailing direction and force of wind, 413; direc¬ 
tion and force of wind during February, 416; March, 417; April, 
418; May, 420; June, 421; are there winds from the South strong 
enough to counteract the trade wiuds ? 422; the prevailing direc¬ 
tion of tho wind from July till frost, 425; the side of a field on 
which the worms first begin work, 427; effect of local topo¬ 
graphical features on extent of ravages, 429; is there any other 
food plant? 423; time of year when the moths are first noticed, 
435; time of year when the worms are first noticed, 437; time of 
year when the last worms are seen, 440; number of broods, 442; 
other situations beside cotton leaves in which the worms have 
been known to spin up, 445; has the chrysalis been known to 
survive a frost or to be found in a sound and healthy condition 
in winter? 448; has the moth been found hibernating? 451; how 
late in the spring lias the moth been found alive? 454; verte¬ 
brate enemies of the cotton-worm, 456; invertebrate enemies, 
459; estimates of the relative value of poisoned sugar, molasses, 
and vinegar, and fires for killing the moths, 461; relative value 
of sweets smeared upon trees and contained in vessels, 465; what 
flowers are.attractive to the moths, 467; influence of jute, 469; 
efforts to destroy the moths in winter quarters, 470; efforts to 
destroy the chrysalides, 472; efforts to destroy the eggs, 473; is 
Paris green the best poisonous mixture for destroying the 
worms? 475; injurious effects following the use of Paris green, 
477; best and most effective method of destroying the worms, 
480; the average cost per acre for protecting it by the best 
means known, 482; other cotton insects, 484. 
Appendix III: 
List of correspondents. 491 
Index. 495 
