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Moneilema, or cactus longhorn beetles are a genus of large, flightless, black beetles found in North American deserts of the western United States and northern Mexico. M. gigas is native to the Sonoran Desert at elevations below 4900 feet (1500m). [ 1 ]
Collectively - with 19 other Moneilema species - M. gigas is also known as the cactus longhorn beetle. Moneilema gigas normally feeds on chollas and prickly pear cacti, and is known to feed on saguaro seedlings. Larvae bore into cactus roots and stems, sometimes killing more susceptible individuals. Adults also feed on the surface of cacti. [2]
Common tuft bearing longhorn beetle (Aristobia approximator) Acrocinus longimanus – harlequin beetle, a large species where the male has very long front legs; Anoplophora chinensis – citrus long-horned beetle, a major pest; Anoplophora glabripennis – Asian long-horned beetle, an invasive pest species; Aridaeus thoracicus – tiger ...
Moneilema semipunctatum is a species of beetle in the family Cerambycidae. [1] It was described by John Lawrence LeConte in 1852. [1] It is known commonly as the cactus borer beetle. Beetles of genus Moneilema are known commonly as cactus longhorn beetles. [2] It is native to North America, where it occurs in the western United States and ...
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Longhorn beetle larvae are called round-headed borers and most feed on dead and decaying wood. Some species feed on living plants. They tunnel inside the wood and so are rarely seen, only emerging as adults. Most species have a limited flight time during which they may be found. Adult longhorn beetles feed on flower nectar, sap, or leaves and bark.
Placosternus difficilis, commonly known as the mesquite borer, is a wood-boring longhorn beetle [1] [2] which resembles a black and yellow wasp. [3] Larvae of mesquite borers are deposited in, among others, mesquite trees, although it has been recorded from a range of hosts and is considered polyphagous. [4]
Adult beetles are 8–30 mm long reddish-brown to black, while males are generally smaller and lighter in colour. [3] [4] The body is elongated and oval, typical for longhorn beetles. The head angles forward, showing most of the mouth parts. The thread-like antennae are half to three-quarters of the body length, longer in males.