Identification, Images, & Information
For Insects, Spiders & Their Kin
For the United States & Canada
Individual Volumes:

1 18672 18683 18704 18725 18746 18777 1878/18798 18809 1881/188210 1882/1883

11 188412 188513 188614 1887Sup 188715 188816 188817 189018 189119 189220 1893

21 189422 189523 189624 189725 1898/189926 1899/190027 1900/190128 190229 1902/190330 1904

31 190532 190633 190734 190835 190936 191037 191138 1912/191339 191340 1914/1915

41 191542 191643 191744 191845 191946 192047 192148 1922

Volumes from 49(1923) to 76(1950) are available from Cornell's Core Historical Literature of Agriculture site here
http://www.archive.org/search.php?query=Transactions%20American%20Entomological%20Society