Description: Distinctly elongate, small to moderate-sized, ranging from about 8–15 mm in length. Integument generally dark brown or ferrugineous with grayish pubescence. Head with frons subquadrate to slightly elongate, about as wide as width of 2-4 lower eye lobes. Eyes with lower lobes ovate to oblong to distinctly narrow. Genae shape highly variable, from elongate to transverse, from shorter to taller lower eye lobes. Antennal tubercles prominent, widely separated; tubercles not armed at apex or armed at apex with small projection or short, blunt horn (males); antennae slightly longer (females) to nearly twice as long (males) as overall body length; scape gradually to clavate, shorter than antennomere IV; antennomere III shape variable, from nearly straight to sinuate, distinctly longer than scape and about as long as IV; antennomere XI shorter than X (females) or longer than X (males); antennae annulate. Pronotum subquadrate, roughly cylindrical, without lateral tubercles. Elytra with sides nearly straight, roughly parallel; elytral apices individually rounded; elytral markings variable, often with distinct vittae; base of elytra without prominent tubercles at humeri. Basal 1/3 of elytra moderately to densely punctate, surface coarsely punctate to granulate-punctate. Procoxae simple, without projection. Mesosternal process with apex subtruncate to feebly emarginate. Metafemora distinctly short, about 1/5 as long as elytra.
The combination of the following characters will help to distinguish this genus: distinctly elongate form; subquadrate pronotum, roughly cylindrical, without lateral tubercles; and elytra with sides roughly parallel.
Similar genus/genera: superficially resembles Xylomimus, but Cacostola is much more elongate.
Geographic Distribution
Antilles (Dominica, Dominican Republic, Grenadines, Guadeloupe, Martinique, Montserrat, Puerto Rico, St. Thomas)
Central America (Costa Rica, Guatemala, Honduras, Mexico)
North America (USA)
South America (Argentina, Bolivia, Brazil, Chile, Colombia, Ecuador, French Guiana, Guyana, Paraguay, Venezuela)
NOTE: Although Cacostola vagelineata was originally described from Chile (Fairmaire & Germain, 1859), this is likely an erroneous record as no members of this species have been collected there since.