Lasiocolpus rostralis (Poppius, 1909)

(Fig. 267)

Whiteiella rostralis Poppius, 1909:14

Lasiocolpus rostralis: Carpintero 2002: 28

Diagnosis: Characterized by the coloration of pronotum and scutellum, slightly reduced and laterally sinuate hemelytra, shape of cuneus and membrana, segment II of labium not extending beyond the centre of mesosternum, and males with midtibiae similar to foretibiae in having a row of teeth.

Redescription: Measurements, see Table VII. Male. Dorsal view: Body oval. General coloration dark brown, antennae (excepting darker basal half of segment II), collar, extreme base of pronotum and central spot on pronotum, scutellum (excepting blackish spot on mesoscutellum and in some specimens with another preapical spot), basal half of clavus, basal third of corion, round spot on base of cuneus and tip of cuneus pale. Pilosity short, semierect. Head: Eyes small; anteocular region longer than eye length. Proportion of antennal segments (I:II:III:IV) 1: 3.1: 2.6: 2.7. Labial segment II not surpassing hindcoxae. Thorax: Pronotum with lateral margins slightly sinuate; carinate in apical half; collar narrow; calli large but not very protuberant; posterior lobe very narrow, sparsely punctured and wrinkled (Fig. 283). Hemelytra translucent, almost reaching apex of abdomen, sinuate by reason of broadened exocorion near mid length (Fig. 284); cuneus short and broad; membrana from tip of cuneus not longer than length of cuneus. Ventrally pale with median stripe darker on meso- and metapleura of some specimens. Pilosity decumbent, short, abundant. Midtibiae with row of teeth on ventral surface, similar to foretibiae. Abdomen: Hairs on dorsal surface of abdomen short on outer margins; very sparse, short hairs centrally. Genitalia: Right paramere vestigial; left paramere long and slightly sinuate, distally pointed (Fig. 282). Female: Same coloration as male, more robust. Proportion of antennal segments (I:II:III:IV) 1: 3.3: 2.1: 1.8. Genitalia as in Fig. 285.

Distribution: Argentina, Brazil, Paraguay (Fig. 270).

Material examined: ARGENTINA: ♀ Misiones, P. N. Iguazu, Misiones, Argentina, XII-79, Carpintero col. MACN; BRAZIL: ♂, Nova Teutonia, 27O 11S, 52 23¨ W, F. Plaumann, VI-1953, ex litter, Brit.Mus. 1959-604. BMNH ; ♀, Nova Teutonia, Sta Catarina, VI-1953, F. Plaumann, J. C. Lutz collection 1961. USNM ; PARAGUAY: 5 ♀, San Pedro, Carumbé, 28-I/ 10-III-1965, col. R. Golbach. IMLI .

Discussion: Whiteiella was described by Poppius (1909) who considered it to be systematically very distant from Lasiocolpus due to its lack of a hamus. Carayon (1972a) demonstrated the low systematic value of the presence or absence of this structure, thereby confirming that this species belongs to the genus Lasiocolpus . It differs from L. unicolor (which is closely resembles) by having a shorter labium and different coloration, as well as by characters of the male genitalia.