Hylesinus


Type species

Hylesinus crenatus Fabricius

Adapted from Wood 1982, p. 110-119


Diagnosis

In general, North American Hylesinina are similar to Scierus LeConte in the Hylastina, but their procoxae are less widely separated than in those species. In its subtribe, Hylesinus can be easily distinguished by characters of the anterior margin of the eye which is sinuate in Hylesinus, entire in Hylastinus Bedel, and emarginate in Alniphagus Swaine. It can also be distinguished by having a patterned coloration, due to the light and dark colored scale-like setae that cover their bodies.


Description

Species in this genus range from 1.8 to 4.0 mm in length and are 1.8 to 2.0 times as long as wide. The pronotum is wider than long and usually armed on the anterolateral areas by coarse asperities. The scutellum is small. The anterior margin of the elytra is armed by a row of overlapping crenulations. The declivity is convex. The vestiture consists of a mixture of white, light brown and/or black scales in a variety of patterns. The anterior margin of the compound eye is sinuate. The scape is usually as long as the 7-segmented funicle. The club is large and ovate with three straight sutures. The procoxae are subcontiguous.


Distribution

North America to Guatemala, Europe, and Asia to Australia


World fauna

Number of species: 39, Native species: 7, Introduced species: 0


Hosts

Fraxinus, Juglans, Olea, Quercus, Ulmus, among others