Xestocoris collinus (Distant)

O’Donnell, Jane E., 2007, A new species of Xestocoris Van Duzee, with comments on the genus (Hemiptera: Heteroptera: Rhyparochromidae: Rhyparochrominae), Zootaxa 1606, pp. 51-57 : 52-53

Xestocoris collinus (Distant)

Rhaptus collinus Distant 1893 , p. 410;

Xestocoris collinus Bergroth 1916 , p. 221;

Type: The lectotype designated by Scudder (1967) is in the Natural History Museum, London.

It is a male, the left of two pinned specimens on the same card, with the following labels: a) Type (round label outlined in red); b) Rhaptus collina Dist. (handwritten); c) Quiché Mts., 7–9,000 ft., Champion [these mountains are in Guatemala]; d) B.C.A., Hem.1 Rhaptus collina; e) Type (round label outlined in violet); f) Rhaptus collina Distant 1893, G.G.E. Scudder 1965, Lectotype (rectangular pink label).

Redescription: Small (3.0 mm); brachypterous; dorsal surface highly polished, with long pubescence mostly rubbed off. General coloration chestnut, becoming darker on head and amber at tip of tylus, on humeri, on clavus, laterally on corium, and at apex of scutellum. Antennae with first two segments amber, last two segments slightly darker. Venter nearly uniformly dark chestnut, lighter at pleural edges; labium amber; femora chestnut, fading gradually to amber on tarsi.

Head: moderately declivent; tylus broader than first antennal segment; eyes protuberant. Length head 0.50; preocular length 0.35; width head 0.68; interocular 0.45. Antennae with segments I and II terete, III and IV fusiform; length antennal segment I 0.40; II 0.50; III 0.40; IV 0.50; venter of head swollen and punctate on either side of midline; labium with segments II – IV obscured, length labial segment I 0.48.

Thorax: Pronotum with anterior margin slightly concave, posterior margin nearly straight; collar area weakly indented, with a few shallow punctures; lateral margins carinate, only slightly sinuate at level of shallow transverse impression, narrowing gradually anteriorly, trichobothrium present; calli convex, impunctate; posterior lobe with scattered shallow indistinct punctures. Length pronotum: 0.68; anterior width 0.43; posterior width 0.95. Scutellum flat, with punctures along lateral edges and a few mesally; length scutellum 0.53; width scutellum 0.53. Hemelytron: clavus with 3 rows of widely spaced punctures; corium with vein R+M prominent on anterior half; venation otherwise reduced; punctation sparse, with one regular row along claval suture; membrane reduced to a small triangular flap, no veins apparent; length claval commissure 0.35; length apex clavus- apex corium 0.50; length corium 1.45. Legs: fore femora more swollen than mid or hind femora, spines not visible; tibiae sparsely spinose. Metathoracic scent gland with auricle strongly raised, truncate; evaporative area covering half of metapleuron, not extending dorsally at anterior margin; evaporative area on mesopleuron not extending dorsally along meso-metapleural suture.

Abdomen: venter covered sparsely with long hairs and more densely with very short hairs. Genitalia not found upon dissection of the abdomen. NOTE: The female on the same card as the lectotype is 3.3 mm long, lighter in color, and is also brachypterous.

Distribution: Known from Guatemala and Panama ( Slater 1964).

Material examined: The only authoritatively determined material I have seen is the lectotype redescribed above and the associated female mounted on the same card.