42 Beetles described in 1840

Ambonus distinctus is a species of beetle in the family Cerambycidae. It was described by Newman in 1840.

Mezium americanum, the American spider beetle or black spider beetle, is a species of beetle in the subfamily Ptininae, the spider beetles. These are sometimes mistaken for spiders or mites because of their rounded abdomens and long legs. It has a cosmopolitan distribution, but it is an exotic species in Australia.

The Decora longicorn beetle is a species of the family Cerambycidae.

Anelaphus pumilus is a species of beetle in the family Cerambycidae. It was described by Newman in 1840.

Anoplognathus prasinus, commonly known as the green Christmas beetle, is a beetle of the family Scarabaeidae native to eastern Australia.

Anoplophora beryllina is a species of beetles in the family Cerambycidae. It is distributed in China, Myanmar, India, Laos, and Vietnam.

Aphrodisium griffithi, the Veined Capricornbeetle, is a species of round-necked longhorn beetles of the subfamily Cerambycinae.

Apriona swainsoni is a species of beetle in the family Cerambycidae. It was described by Hope in 1840. It is known from Myanmar, China, Laos, North Korea, South Korea, Vietnam, and Thailand. It feeds off of Caesalpinia decapetala.

Bassareus mammifer is a species of case-bearing leaf beetle in the family Chrysomelidae. It is found in North America.

Bledius mandibularis is a species of spiny-legged rove beetle in the family Staphylinidae. It is found in the Caribbean Sea and North America.

Cacostomus squamosus is a beetle of the family Lucanidae found in Australia. It is a diurnal species reaching a length up to 25 mm in males; it occurs on flowers in the eastern coastal forests of Australia. Its larvae, like those of most species of stag beetles, live in decaying wood.

Cephalobarus macrocephalus is only species in the monotypic genus Cephalobarus of straight-snouted weevils belonging to the family Brentidae. This species is present in South America.

Chalcophora japonica, or ubatamamushi in Japanese, also known as the flat-headed wood-borer, is a metallic, bullet-shaped, woodboring beetle of the Buprestidae family. It is endemic to Japan.

Chalcopoecila ornata is a species of beetles in the family Buprestidae.

Chauliognathus tricolor, the Tricolor soldier beetle, is a species of soldier beetle in the family Cantharidae. It has a flattened body between 6 and 16 millimeters long with a prominent red-orange stripe behind the black prothorax. The abdomen is yellow-orange but is mostly obscured by the metallic olive green elytra.

Chrysochroa rajah is a Jewel Beetle or Metallic Wood-boring Beetle of the Buprestidae family.

Curius dentatus is a species of beetle in the family Cerambycidae. It was described by Newman in 1840.

Deretrachys juvencus is a species of beetle in the family Cerambycidae. It was described by Dupont in 1840.

Dermestes peruvianus, the Peruvian larder beetle, is a species of carpet beetle in the family Dermestidae. It is found in North America and Europe.

Didymocantha obliqua is a species of longhorn beetle native to Australia. It is an established exotic in New Zealand.

Dorcus curvidens is a species of stag beetle. Its shell is flatter and duller than other related species.

Epectasis juncea is a species of beetle in the family Cerambycidae, and the type species of its genus. It was described by Newman in 1840, originally under the genus Saperda. It has a wide distribution between Central and South America.

Essostrutha laeta is a species of beetle in the family Cerambycidae. It was described by Newman in 1840. It is known from Guatemala, Mexico, and the United States.

Hydrophilus insularis is a species of water scavenger beetle in the family Hydrophilidae. It is found from northern South America north throughout the Caribbean, Central America, and Mexico into southern Arizona, California, Texas, and Florida in the United States.

Hypomeces rusticus is a species of the true weevil family.

Isohydnocera curtipennis is a species of checkered beetle in the family Cleridae. It is found in North America.

Mylabris oleae is a species of beetle belonging to the Meloidae family.

Naupactus cervinus, the Fuller rose beetle, is a species of broad-nosed weevil in the family Curculionidae.

Naupactus leucoloma is a species of broad-nosed weevil in the beetle family Curculionidae.

Nicrophorus sayi is a burying beetle described by Laporte in 1840.

Pachypus caesus is a species of dung beetle in the family Scarabaeidae.

Phanaeus demon is a species of beetles belonging to the family Scarabaeidae. This species is often incorrectly named as "damon" in collections and in the literature.

Phoracantha recurva, the lesser Eucalyptus longhorn, is a species of beetle in the family Cerambycidae.

Phymasterna lacteoguttata is a species of beetle in the family Cerambycidae. It was described by Laporte de Castelnau in 1840. It is known from Madagascar. It contains the varietas Phymasterna lacteoguttata var. confluens.

Polyclaeis maculatus is a species of true weevil family.

Polydrusus pterygomalis is a species of weevil native to Europe.

Prosopocoilus astacoides is a beetle of the Family Lucanidae. It lives 8-10 months and is around 50-70mm. Like all beetles in the Prosopocoilus genus they have sharp mandibles it uses for fighting. They will shake their antenna when angry.

Quedius brevis is a species of rove beetles native to Europe.

Sitona cylindricollis, the sweetclover weevil, is a species of broad-nosed weevil in the beetle family Curculionidae. It is found in North America.

Stibara tetraspilota is a species of beetle in the family Cerambycidae. It was described by Frederick William Hope in 1840. It is known from Thailand, Myanmar, India, and Vietnam.

Thoracophorus costalis, the furrowed rove beetle, is a species of unmargined rove beetle in the family Staphylinidae. It is found in Central America and North America.

Tithoes confinis, common name giant longhorn beetle, is a species of beetle of the family Cerambycidae.