Concentrates on Tribe Scymnini, with keys, descriptions, and external dorsal figures of the insects.
- Taxonomy outdated
- No figures of appendages or internal anatomy.
What makes up for limitations:
- More-detailed keys and descriptions and more dorsal figures of Tribe Scymnini species than in Gordon's 1985 "The Coccinellidae (Coleoptera) of America North of Mexico."(1)
- Available free online, unlike Gordon's 1976 "The Scymnini (Coleoptera: Coccinellidae) of the United States and Canada."(2)