Eschatomoxys andrewsi Aalbu and Thomas, 2007

López-Guerrero, Irma, 2007, Figs. 30 – 33. Attavicinus monstrosus. 30 in Comparison of Mouthpart Morphology of Three Species of Mexican Oniticellini (Coleoptera: Scarabaeidae: Scarabaeinae) in Relation to Their Trophic Habits, The Coleopterists Bulletin 61 (4), pp. 519-540 : 519-540

Eschatomoxys andrewsi Aalbu and Thomas , new species

Form elongate, fiddle-shaped, apterous. Color uniformly castaneous to piceous, shining. Males, body length: 8.2–9.4 mm; width 3.6–4.2 mm. Females, length: 8.8–9.6 mm; width 3.8–4.0 mm.

Head. Prognathous, slightly deflexed, dorso-ventrally compressed; subquadrate in dorsal view, cranium somewhat shorter (1.5–1.9 mm) than width (1.8–2.1 mm), greatest width across epistoma. Lateral epistomal margins rounded and converging toward eyes. Median epistomal lobe produced, arcuate, margin serrulate. Epistomal sutures vague to obsolescent. Supraorbital carina weak and short, beginning at middle of lateral epistomal lobe and fading above middle of eye; cuticle behind eye smooth. Cranial surface set with shallow punctures on dorsum separated from one another by about three to five diameters of a puncture, becoming denser to contiguous on sides of head at base, vague to obsolescent on venter. Eyes, oval, not bulging, anteriorly emarginated to accommodate epistomal canthus; facets in ten horizontal rows, submedian row longest with 8 facets. Posterior margin of eye separated from cervix by distance equal to about one and one-half diameter of eye. Labrum retractile, apex broadly emarginated, edge bristling with golden setae. Mandibles thick, robust, left side dominant (overlapping right), apex bifid; superior margin with stout angular cusp, somewhat larger on right mandible than left. Maxillary palpus approximately equal in length to first two antennomeres, basal segment longest (apical segment more elongate, slender in male, subsecuriform in female). Mentum hexagonal, surface coarsely punctate. Submentum with large ovoid fossa at middle. Gula indistinct; tentorial pits obsolete. Antennae filiform, antennomeres slender except basal segment broadened apically and last segment spindle-shaped, acuminate; third segment longest; fourth to seventh subequal; eighth to tenth successively shorter until penultimate segment, which is about twice as long as wide; last segment about 1 K times length of penultimate; last two and apical half of third to last clothed in short golden pubescence.

Thorax. Pronotum cylindrical, shorter than head, wider (1.9–2.4 mm) than long (1.4–1.7 mm), widest at middle; surface of dorsum with very shallow, widely spaced punctures on anterior and middle of disc, becoming larger and denser posterolaterally; large and scattered ventrally. Distinct, complete lateral carinate bead on side of thorax, ending anteriorly in acute anterolateral angle. Base of pronotum constricted with thick, marginal bead demarcating posterior edge. Elytra inflated, embracing abdominal venter; surface glabrous, with widely spaced punctures tending to run in rows, strongest in humeral area. Epipleura widest basally, about as wide as metepisternum, gradually narrowing to about third abdominal segment, parallel thereafter, apex about half width at base. Femora long, clavate; tibiae and tarsi long, slender.

Abdomen. Ovoid in form, widest at middle (3.6–4.2 mm), length 5.3–6.4 mm; base slightly wider than apposing pronotal base. Surface of abdominal sternites smooth, impunctate. Length of first abdominal sternite from metacoxa to posterior margin slightly shorter or subequal to length of second abdominal sternite; third about two-thirds length of second; fourth about half length of third; fifth about twice length of fourth at midline. Males with elongate, ovoid, pubescent fovea at middle of first abdominal sternite. Genitalia as in E. pholeter .

Holotype. Male , CALIF: Riverside Co. Painted Canyon, IX-13-78/ 1-7-1979, Fred G. Andrews, (b) Ethylene Glycol Pit trap in Desert Wash . Paratypes: 1 male, 2 females, same data as type ; 2 females, CALIF. Riverside Co. Painted Canyon, V-18-78 / IX-14-1978 Antifreeze Pit trap, Fred G. Andrews ; 2 females, CALIF. Riverside Co. Painted Canyon, V-18-78 /! X-13-1979, F. Andrews & K. Cooper (b) Ethylene Glycol Pit Trap ; 1 female, CALIF. Riverside Co. Painted Canyon IV- 15-1979, Fred G. Andrews & M.S. Wasbauer colls .; 1 female, CALIF. Riverside Co. Painted Canyon, el. 500 9 Sand Wash-Larrea-Palo Verde, IX-13-78 to I-7-79, 530 Ethylene glycol can trap, R. Aalbu collr .; 1 female, Painted Canyon , Cal. April 8, 25, Timberlake coll. (b) Eschatomoxys wagneri det. Blaisd. ?; 3 males, 1 female, CALIF. Riverside Co., Box Cyn , 10 mi. E. Mecca, VIII-9/10-86 pit trap, Rolf L. Aalbu Coll .; 1 female, CALIF. Imperial Co. 3.9 mi. N. Walters Camp, IV-27-70 to VII-19-1978, Hardy & Andrews .

Etymology. The specific epithet honors Fred G. Andrews, the collector of the holotype and many of the paratype specimens.

Diagnosis. Similar to E. wagneri but with a complete lateral bead on the side of the pronotum.