38 



Concerning the control of this insect on corn, Mr. Glover states: 



The method to extirpate these insects would be to devise some method of destroy- 

 ing the first brood of the perfect moths before the eggs are deposited, either by 

 means of lights or the vinegar and molasses on plates, as suggested by Colonel 

 Sorsby. 



In the Patent Office Report for 1855 Mr. Glover gives further 

 observations on the bollworm and again refers to the remedial meas- 

 ures previousl}^ mentioned. The possibility of poisoning the vinegar 

 and molasses solution to kill the moths is suggested. Mention is made 

 of the dissection of a single bollworm moth b}^ Dr. John Gamble, of 

 Tallahassee, Fla., which contained at least 500 eggs. 



In the Monthl}^ Report of the Department of Agriculture for 1866, 

 page 282, Mr. Glover, under the title " Insects Injurious to the Cotton 

 Plant," again presents previously determined facts concerning the 

 bollworm without adding any points of importance. Three genera- 

 tions at least are said to occur annually in Georgia. Nothing is added 

 to the remedial measures previously indicated. 



Aside from frequent notice of injury from the bollworm in various 

 parts of the cotton belt in the Monthly Reports from 1867 to 1876, Mr. 

 Glover's work on this species seems to have closed in 1865. Mention 

 should, however, be made of his " Manuscript Notes from my Journal, 

 Cotton and the Principal Insects, etc., Frequenting or Injuring the 

 Plant in the United States," a collection of illustrations of this class 

 of insects bearing date of 1878 and issued for private distribution. 

 Although Mr. Glover determined many valuable points concerning 

 the life and habits of the bollworm, but little progress was made in 

 the way of determining effective means of control. His recommenda- 

 tions for the use of sweets and fires to attract moths to their destruc- 

 tion have subsequently been shown to be of no practical value. 



The next important work of the Department pertaining to the boll- 

 worm was begun July 1, 18T8, in connection with an investigation of 

 the insects injurious to the cotton plant, ordered by Congress. This 

 work was in charge of Prof. C. Y. Riley until the date of his resigna- 

 tion as Entomologist of the Department of Agriculture, Ma}^ 1, 1879, 

 when the continuance of the investigation fell to Prof. J. H. Comstock, 

 appointed to the vacancy. A special report was ordered by Congress 

 from the Department of Agriculture on insects affecting the cotton 

 plant, and this was submitted b}^ Professor Comstock November 14, 

 1879, entitled "Report on Cotton Insects," a work of 511 pages, deal- 

 ing with the cotton-leaf worm (Alahama argillacea Hbn.) and the cot- 

 ton bollworm, 28 pages being devoted to a consideration of the latter 

 insect. 



At this time, also, an investigation of the bollworm was in progress 

 in connection with a study of cotton insects b}^ the United States Ento- 

 mological Commission, working independently of the Department of 



