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For Insects, Spiders & Their Kin
For the United States & Canada
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Species Periplaneta australasiae - Australian Cockroach

Australian Cockroach - Periplaneta australasiae Australian Cockroach - Periplaneta australasiae Cockroach - Periplaneta australasiae Another Surinam ? - Periplaneta australasiae Australian cockroach? - Periplaneta australasiae Australian - Periplaneta australasiae Australian - Periplaneta australasiae Fast roach nymph - Periplaneta australasiae
Kingdom Animalia (Animals)
Phylum Arthropoda (Arthropods)
Subphylum Hexapoda (Hexapods)
Class Insecta (Insects)
Order Blattodea (Cockroaches and Termites)
Superfamily Blattoidea
Family Blattidae
Genus Periplaneta
Species australasiae (Australian Cockroach)
Up to 45 mm long.
Adult has thorax outlined in yellow with black/brown center marking somewhat like a sideways number eight. Differentiating Australian cockroaches from other species of Periplaneta requires identification of the narrow yellow mark along front outside edge of wings:

Immature Australian cockroaches are considerably more ornate than nymphs of other Periplaneta species found in North America:
They are scavengers, they feed on almost everything
A nocturnal species that favours tropical and subtropical climates.
See Also
The four species of Periplaneta cockroaches found in the US are easily confused. See the distinguishing characterstics of these species on the Periplaneta page.

Most notably, American Cockroaches have similar markings but lack the pale yellow edge on their wings.
Internet References
Bugs in Cyberspace has additional images.
The Scientific Pest Management Pest Database has a photo and info.
UNESCO has a great article about Major Pests of Libraries and discusses the various species of cockroachs including P. australasiae.