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

Parasitengona - velvet mites (including chiggers) & water mites

Proceedings of the Entomological Society of Washington- Journal available for free at Internet Archive
Individual Volumes:

1 1884-18892 18903 18914 1896-19015 19016 19047 19058 19069 190710 1908

Entomological News- Journal available for free at Internet Archuve
Individual Volumes:

1-2 1890-189103 189204 189305 189406 189507 189608 189709 189810 1899

Pest identification and diagnosis
pictorial keys to important pest spp. and sound general info on several major groups, incl. aphids, mealybugs, scale insects, whiteflies,
(despite the name, the site deals with a wide variety of topics beyond bumble bees)
Pictorial guide to North American species

Ohio State University Extension fact sheets
scroll down to 'Insect and Pest Series Index'.
i find their fact sheets dealing with minor domestic pests (psocids, fungus beetles, carabids, and the like) and invaders to be the most useful part of that collection for BG purposes.

The National Agricultural Library's Agricultural Thesaurus

Ziser S.W. (2008-2012) The aquatic invertebrates of Texas

European and Mediterranean Plant Protection Organization (EPPO)
Data sheets -- very informative, cover hundreds of agricultural pests, incl. many of relevance for our area