Cenophengus howdeni Zaragoza-Caballero, 1986

Fig. 11A-H

Cenophengus howdeni Zaragoza-Caballero, 1986: 933.

Type locality.

Durango, Mexico.

Type material examined.

Holotype ♂: "MEXICO: Durango /24 ml. W. La Ciudad/ Dgo. MEX. VII. 11. 64/ H.F, Howden" | CNIN.

Remarks.

Cenophengus howdeni is morphologically similar to C. tupae, but can be distinguished by the length of antennomere 1, the pronotal disc and interocular distance. In C. howdeni, antennomere 1 shorter than next two combined, whereas in C. tupae, it is longer than next two combined. The pronotal disc with groove along mid-line in C. howdeni, in C. tupae, it has disc convex, weakly elevated dorsally forming a small depression in the basal part of each side. The interocular distance is 3 times eye width in C. howdeni, in C. tupae, it is twice as long as eye width.

Diagnosis.

Integument chagreened, antennae long, more than twice the length of pronotum, antennal rami twice as long as the respective antennomere, each elytron 2.6 times as long as wide; aedeagus with three teeth at the inner apex of paramere.

Redescription.

Male. Body length 5.20 mm; maximum body width 0.60 mm (pronotum). Body brown, yellowish mandibles with darker tips (Fig. 11A, B). Head. Wider (0.67 mm) than long (0.36 mm) (Fig. 11C), at eye level, a wider than the pronotum, integument chagreened, punctures as long as eye facets and separated by approximately 1 punctured diameter, each puncture bearing a brown seta; interantennal distance (0.15 mm) wider than the length of antennomere 1 (0.10 mm); eyes 1/2 as long as head in lateral view, longer (0.45 mm) than wide (0.16 mm); interocular distance (0.45 mm) 3 times eye width; antennae long (1.64 mm) more than twice the length of pronotum; antennomere 1 (0.10 mm) shorter than next two combined (0.17 mm), antennomere 3 cup-shaped, 4 (0.12 mm) shorter than following antennomeres, 5 to 11 about equal in length (0.15 mm), 12 (terminal) (0.25 mm), antennal rami lanceolate in lateral view, twice as long as the respective antennomere; terminal maxillary palpomere robust, securiform (0.25 mm), as long as the preceding three combined (0.24 mm); terminal labial palpomere spindle-shaped (0.10 mm), 3 times as long as preceding one (0.03 mm). Thorax. Pronotum as long (0.74 mm) as wide (0.70 mm) (Fig. 11D); integument chagreened, punctures as long as eye facets and separated by approximately 2 punctured diameters, each puncture bearing a brown seta, disc convex, posterior magin curved with middle notch, sides almost straight, anterior angles rounded and posterior angles acute; mesosternal suture complete; scutellum with posterior margin rounded; each elytron 2.6 times as long (2.10 mm) as wide (0.80 mm), convex, without longitudinal costae, elytral apex obtuse; hind wings with posterior radial vein (RP) length 6 times less than the length of MP1+2, radial cell closed, r3 vein absent, r4 vein reduced (not reaching the RP or the radial cell), those of the anterior anal and posterior anal sectors (Fig. 11E). Legs: tarsomeres of the holotype lost. Abdomen. Integument shiny, punctured, with long dense setae, sternite 7 with margin sinuate, sternite 8 with margin notched; aedeagus with three teeth at the inner apex of paramere (Fig. 11F-H).

Female and immatures.

Unknown.

Distribution.

Mexico: Durango (Fig. 3).