Metachroma quadrimaculatum Jacoby 1891

Metachroma quadrimaculatum Jacoby

Metachroma quadrimaculata Jacoby, 1891, p. 235.

DESCRIPTION.—Approximately 3.7–4.6 mm in length, oblong oval, shining, pronotum finely and sparsely punctate, elytra with striate punctures not distinct to apex, yellow-brown, pronotum with from two to four spots, often an occipital dark spot, elytra with one or two median spots on each elytron.

Head with interocular space more than half width of head, usually finely and not densely punctate over front and more coarsely and densely punctate on clypeus, no transverse sulcus dividing front and clypeus, clypeus with a very slight emargination over labrum, often a depressed line on front, yellow-brown, usually with a dark occipital spot. Antennae extending below humeri, distal joints tending to be darker. Prothorax broad but not twice as wide as long, with arcuate sides and small tooth at each angle, not very convex, yellow-brown, usually with four piceous spots, the middle ones elongate, often outer spots or even all spots missing, finely and sparsely punctate, although sometimes more coarsely and densely punctate. Scutellum reddish brown. Elytra not three times as long as prothorax, with prominent humeri and slightly costate intervals between striae near base and on sides, a faint transverse depression below basal callosity, striate punctures moderately fine, becoming obsolete on sides and at apex, shining pale yellowish brown with sutural edges tending to be deep reddish brown and usually on each elytron two piceous vittate spots, sometimes reduced to one or entirely missing, or enlarged to form a median vitta. Body beneath and legs pale yellow-brown, femora with minute tooth; claws with tooth nearly half as long as claw. Length, 3.7–4.6 mm; width, 2.0–2.5 mm.

TYPE.—In BMNH.

TYPE-LOCALITY.—Cuernavaca, Mexico (H. H. Smith, collector).

OTHER LOCALITIES.—Mexico: Atlixco, A. Fenyes; Cuernavaca, A. Fenyes. Arizona: Tucson, E. P. Van Duzee, J. N. Knull; Sabino Canyon, D. J. and J. N. Knull; Tex Canyon, Cochise County, Chiricahua Mountains, J. A. Kirsche; Nogales, D. J. and J. N. Knull; St. Xavier Mountain, Tucson, E. P. Van Duzee.