Oncid ID: Tool for Diagnosing Adult Twig Girdlers (Cerambycidae: Lamiinae: Onciderini)
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Genus: Delilah

Diagnostic Features
  • Description: Elongate-ovate, robust, moderate to large-sized, ranging from about 16–22 mm in length. Integument generally dark brown with whitish, brownish, and ochraceous pubescence. Head with frons elongate, about as wide as width of 1 1/2 to two lower eye lobes. Eyes with lower lobes large, oblong. Genae elongate, about as tall to distinctly taller than lower eye lobes. Antennal tubercles prominent, narrowly separated, contiguous at base; tubercles not armed at apex (females) or armed with a small projection, or with a short, blunt horn (males); antennae about as long as overall body length (females), or as much as twice as long (males); scape clavate, about as long or longer than antennomere IV; antennomere III nearly straight or curved, longer than scape and antennomere IV; antennomere XI shorter than X (females) or longer than X (males). Pronotum transverse, conical, wider at base, without lateral tubercles. Elytra with sides attenuate; elytral apices individually rounded; elytra generally uniform in coloration or speckled, or with distinct maculae; base of elytra with four prominent, triangular, smooth tubercles at humeri. Basal 1/3 of elytra moderate to dense punctation, surface coarsely punctate to granulate-punctate. Procoxae without projection (females) or with distinct, curved hook (males). Mesosternal process with apex feebly to deeply emarginate. Metafemora moderate in length, about 1/3 as long as elytra.

  • The combination of the following characters will help to distinguish this genus: large eyes; conical pronotum; base of elytra with four prominent, triangular, smooth tubercles at humeri; and elytra with sides attenuate.

  • Similar genus/genera: superficially resembles Lesbates and Typhlocerus.
Geographic Distribution
  • South America (Brazil, Peru)
Host Plants/Trees
  • Unknown
Girdling Behavior
  • Unknown
Notes

The genus Delilah currently contains two species:
  Delilah gilvicornis (Thomson, 1868) [♂ specimen]
  Delilah gilvicornis (Thomson, 1868) [type specimen, ♂]
  Delilah subfasciata Dillon & Dillon, 1952

Generic Synonymies
  • The type species of this genus was originally described in the genus Hypsioma.
Selected References
 

Delilah gilvicornis
♂ specimen
© E.H. Nearns

 

© 2011-2015 Nearns, E.H., Lord, N.P., and K.B. Miller
The University of New Mexico and Center for Plant Health Science and Technology, USDA, APHIS, PPQ.