. Useful birds and their protection. Containing brief descriptions of the more common and useful species of Massachusetts, with accounts of their food habits, and a chapter on the means of attracting and protecting birds . generation a year.^ Assuming that Sanderson is correct, and the average number ofeggs laid by each female is five hundred, the progeny would num-ber five hundred for the year where the insect is single brooded;where there are two broods the number would be two hundred andfifty thousand; with two and one-half broods the number wouldbe sixty-two million, five hundred thousand,
. Useful birds and their protection. Containing brief descriptions of the more common and useful species of Massachusetts, with accounts of their food habits, and a chapter on the means of attracting and protecting birds . generation a year.^ Assuming that Sanderson is correct, and the average number ofeggs laid by each female is five hundred, the progeny would num-ber five hundred for the year where the insect is single brooded;where there are two broods the number would be two hundred andfifty thousand; with two and one-half broods the number wouldbe sixty-two million, five hundred thousand, which is close to Report of Minnesota Agricultural Experiment Station, Bulletin No. 43, December,1895, p. 158. 2 Report of Mississippi Agricultural Experiment Station, Bulletin No. 41, March, 1897,p. 188. Insect Pests of Farm and Garden, by E. Dwight Sanderson, 1912, p. 293. 434 APPENDIX. Glo^■ers statement; and if three broods were raised the numberwould be six hundred and twenty-five milUon. Under the circum-stances it seems probable that the estimate by Glover is not anexaggeration if three broods or even two and one-half broods areraised, but such a statement would not apply to the northern partof the INDEX. Index. [Heavy-faced type indicates the principal reference to a species. Inmost instances a briefdescription of the bird referred to may be found on the page thus indicated. Headlinesof chapters and divisions are not indexed, hut are included in the table of contents,] PAGE Accipiter cooperi, velox, .... Actitis macularia, Agelaius phoeniccus phctniceus, sponsa, Akerman, Alfred, Alabama argillacea, Allen, J. A., Altum, Bernhard, Aluco pratincola, Animodramus savannarum australis, Anabrus simplex. Anas rubripes tristis, . Anthonomous grandis, Antrostomus vociferus vociferus, Aphis, larch, eggs of, . hop vine, .... woolly apple,Aphodius inquinatus,Archilochus colubris, .Ardea herodias worm, ....Asio flanimeus, .... .wilsonianus,Astragalinus t
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