Operclipygus campbelli sp. n. Fig. 58EMap 20

Type locality.

GUATEMALA: Suchitepéquez: Finca San Rafael Olimpo [14°32'N, 91°34'W].

Type material.

Holotype male: "GUAT. Finca San Rafael Olimpo, Cuyotenango Such. I.21.1966, J.M.Campbell, 1700 ’“ / "collected from large detritus cavity of Atta sp ., 6-8' deep"/ "FMNH-INS 0000069340" (FMNH). Paratypes (186): GUATEMALA: Suchitepéquez: 116: Cuyotenango, Finca San Rafael Olimpo, 1700ft, 21.i.1966, large detritus cavity of Atta sp., 6-8' deep, J.M. Campbell (FMNH, MSCC, AKTC, CHND), 70: 26.ii.1966 (FMNH).

Diagnostic description.

This species is extremely similar to the preceding, differing in only a few characters as follows: length: 1.65-1.93 mm, width: 1.34-1.59 mm; body completely lacking microsculpture; marginal pronotal stria not descending to hypomeron, generally complete along upper edge of lateral pronotal margin as well as behind head; anterior submarginal pronotal stria strongly recurved posterad on about anterior one-third of pronotal disk; elytra with outer subhumeral stria complete, interrupted at middle, or with apical half obsolete, 5th stria present in apical half, sutural stria present in apical two-thirds; prosternal keel truncate at base, not emarginate; mesoventral margin weakly projecting at middle, mesoventral marginal stria complete; mesometaventral stria bluntly angulate forward, only reaching middle of mestosternal disk; propygidium with coarser punctures slightly larger and more closely set, separated by slightly less than their diameters; marginal pygidial stria obsolete in basal half or more. Male genitalia indistinguishable from those of Operclipygus geometricus (see Figs 57 A–D, J).

Remarks .

This species is very similar to Operclipygus quinquestriatus . Both have a nearly complete, but interrupted outer subhumeral elytral stria, as well as a complete frontal stria, strongly recurved anterior submarginal pronotal stria, and a lateral submarginal pronotal stria that is complete and close to the margin. Operclipygus campbelli has the 5th dorsal elytral stria short (Fig. 58E), nowhere near complete as in Operclipygus quinquestriatus .

Etymology.

We name this species to honor J. Milton Campbell, recognizing his efforts in collecting an exceptional series of this otherwise uncollected species.