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General Information
Identification Requests
How to Use a Key for Insect Identification
SEL's Slide-mounting Tutorial Videos
SEL and collections: a presentation at 2010 Entomological Society of America Meeting


Acari
Flat Mites of the World


Diptera
A Catalog of the Cecidomyiidae (Diptera) of the World, 4th Ed. (2017) (pdf)
Systema Dipterorum: The BioSystematic Database of World Diptera

Hemiptera
Asa Fitch's Aphid Notes

Leafhopper Checklist
Treehopper Immatures Project

Hymenoptera
Hymenoptera Holotypes of the USNM
Online Key to Nearctic Chalcidoidea
Learn about the HYM Course
USNM Hymenoptera Gigapan Project
The Chalcid Forum Archives

Lepidoptera
Gelechioidea - Dr. Mark A. Metz
Specimens curated in the U.S. Entomological Collection
Autostichidae
Batrachedridae
Blastobasidae
Coleophoridae
Cosmopterigidae
Depressariidae
Elachistidae
Gelechiidae
Lecithoceridae
Lypusidae
Momphidae
Pterolonchidae
Oecophoridae
Scythrididae
Stathmopodidae

Noctuoidea - Dr. Paul Z. Goldstein
Specimens curated in the U.S. Entomological Collection
Noctuidae
Lymantriinae

Pyraloidea and related families - Dr. M. Alma Solis
Key to Selected Pyraloidea Larvae Intercepted at U. S. Ports of Entry
Specimens curated in the U.S. Entomological Collection
Crambidae
Pyralidae
Hyblaeidae
Pterophoridae
Thyrididae

Tortricoidea - Dr. John W. Brown (emeritus)
Online World Catalog of the Tortricidae
Specimens curated in the U.S. Entomological Collection
Types of Tortricidae
Tortricidae

Yponomeutoidea - Dr. Mark A. Metz
Specimens curated in the U.S. Entomological Collection
Heliodinidae
Lyonetiidae
Plutellidae
Yponomeutidae

Ypsolophidae
The Systematic Entomology Laboratory is located in Washington, DC and is part of the Northeast Area.
The Research Leader is Michael Gates.
Email: michael.gates@usda.gov
Phone: 202-633-4554
Fax: 301-504-6482
c/o Smithsonian Institution, Nat'l.Mus.Nat.History
10th and Constitution NW, MRC-168, Rm. CE521
Washington, DC 20013-7012