Modification of key (Wood 1982 key) to Chaetophloeus of North and Central America

The text in Wood’s couplets has been extensively re-arranged and paraphrased, such that it is not possible to identify his original text.

7 (6) Declivity clearly sulcate with interstriae 3 elevated; submarginal crenulations on elytral bases entirely absent (Fig. 1 A,E, Fig. 3 A,E); declivital sulcus poorly developed (Fig, 1D, H, Fig. 3 D,H)..............................................7’

- Declivity flattened or rounded, interstriae 3 not notably elevated; one pair of small submarginal crenulations present at base of interstriae 2 (Fig. 4 A,E); declivital interstriae 2 more strongly impressed, 3 weakly but distinctly elevated at least apically (Fig. 4 D,H); small patches of light scales irregularly scattered on pronotum and elytra; erect interstrial scales less than three times as long as wide; Hidalgo; Hosts composite shrubs in xeric habitats; 1.6–2.0 mm........................ sulcatus (Wood)

7’ (7) Basal crenulations 1–3 slight offset posteriorly with respect to others; scales predominantly dark brown and beige; basal half of pronotum with a continuous row of beige scales; anterior half with predominantly brown; scales on elytra with odd numbered interstriae mainly pale, dark on even numbered interstriae, suggesting rows (Fig. 3 A,E). In Rosaceae, from northern Mexico to Manitoba............................................................................. heterodoxus (Casey)

- Basal crenulations 1–3 in line with others; scales predominantly light brown and white; basal fourth of pronotum with a continuous row of brown scales; anterior ¾ with irregular mix of white and brown; scales on elytra with irregular mix of light and dark scales, not suggesting rows (Fig. 1 A,E). In composite shrubs ( Flourensia) in Chihuahuan Desert.................................................................................................. flourensiae Atkinson