Ischnopelta bechyneorum Rosso & Campos, sp. n. (Figs. 4A, 5B, 14–15)

Etymology. Epithet in honor to Jan Karel Bechyné and Bohumila Springlová Bechyné who worked at the Museu Paraense Emilio Goeldi between 1960 and 1963.Although they were specialists on the beetle family Chrysomelidae, they collected many other insect groups, including specimens of this and five other species included in the present study.

Type locality. BRAZIL, Mato Grosso, Chapada dos Guimarães [-15.4610, -55.75].

Holotype. Male. BRAZIL, Mato Grosso, Chapada dos Guimarães, 2.II.1961, J. & B. Bechyné. Deposited at the Museu Paraense Emilio Goeldi (MPEG), Belém (PA), Brazil.

Paratypes. 3 males and 4 females. BRAZIL, Mato Grosso, Chapada do Guimarães, 2 females, 2. II.1961, J. & B. Bechyné, [-15.4610, -55.75], (MPEG); Mato Grosso do Sul, Três Lagoas, (Água Tirada), 1 male, 15–30. V.1964, Exp. Dpto. Zool., [-20.8, -51.7167], (MZSP); Três Lagoas (Fazenda Dr. José Mendes), 1 male and 1 female, 14–24.X.1964, Exp. Dpto. Zool., [-20.8, -51.7167], (UFRG); Três Lagoas, (left margin of Rio Sucuriu, Fazenda Canaã), 1 male, XI.1966, F. Lane Col., [-20.8, -51.7167], (UFRG); no information about locality, 1 female, VIII.1931, (MCNZ).

Description. The overall somatic morphology is as described for I.scutellata,except for the following features. Head. Maxillary plates and ocular peduncles scarcely punctured. Antennae: segment I and dorsal surface of segments II and III dark yellowish and punctured; ventral surface of segments II to V brown; antennal segments ratio: I>II<II<IV<V.

Thorax. Pronotum slightly longer than the head. Hemelytra: corium as long as scutellum; conspicuous spot at apex of radial vein; in most specimens the radial vein is continued by a reddish line. Pro-, meso- and metasternum moderately punctured. Evaporatorium densely punctured.

Male. Apical margin of hemelytral membrane convex; urosternite VII reaching anteriorly the imaginary line connecting the spiracles of sternite V. Genitalia. Pygophore with dorsal and ventral rim concave (Figs. 14C, dr; 14D, vr). Posterolateral angles 1.3 times longer than the rest of the pygophore, perpendicular to the frontal plane and subparallel to each other (Fig. 14C–E, pla). Setae short and sparse on the posterior half of ventral and lateral surfaces of the pygophore, and on the outer surface of posterolateral angles; setae long on ventral rim and on ventral margin of the posterolateral angles. Segment X as long as wide, dorsally covering the parameres, but not reaching the apex of posterolateral angles; subcircular and emarginated apically; lateral and apical margins sclerotized and covered by long setae; extensive midlongitudinal area membranous and with short and sparse setae (Figs. 14C and E, X; 14L–M). Parameres falciform, flat and oblique to the frontal plane; outer and inner margins sinuous, distal portion of inner margin with minute process followed by concavity; apices truncated and convergent (Fig. 14F–I). Cup-like sclerites externally visible and divergent at apex (Fig. 14D, cls). Phallus: proximal half of vesica laterally sinuous, broader at the base and gradually narrowing, with a subtriangular ventral expansion; distal half sinuous, ventroposteriorlly curved; secondary gonopore posteriorly directed and beveled (Fig. 14J–K).

Legend: tl, total length; mw, maximum width (at the sternite III level); hl, head length; cl, clypeus length; hw, head width; iod, interocellar distance; ied, interocular distance; pl, pronotum length; haw, pronotum width at the level of humeral angles; aaw, pronotum width at the level of anterolateral angles; sl, scutellum length; fll, frenal lobe length; pfl, postfrenal lobe length; bsw, basal scutellum width; fcw; scutellum width at the level of frenal constriction; I, II, III, IV and V, antennal and labium segments length.

Female. Membrane of hemelytra not reaching the posterior margin of mediotergite VIII, posterior margin convex. Genitalia. Valvifers VIII wider than long, posterior margin shaped as an open “V”, sutural angles narrow and subrectilinear, lateral angles wide and concave; sutural angles about 0.3 times the width of the lateral ones; sutural margins subrectilinear; surface convex, dark yellowish; brown punctures and setae on distal half of the sutural margins and sutural angles (Figs. 5B; 15C, vf8). Valvifers IX exposed, lateral margin sinuous; setae on the mid-basal portion of ventral surface (Fig. 15C–D, vf9). Laterotergites IX not reaching the posterior margin of mediotergite VIII; lateral margin convex; setae on median portion of lateral margin and on mid-basal portion of ventral surface (Fig. 15C–D, la9). Thickening of vaginal intima hexagonal, wider than long; distal margin sinuous and more sclerotized; extensive mid-longitudinal area membranous (Fig. 15D, vi). Vesicular area: anterior portion to the collar 1/8 the length of the posterior portion; median duct anterior to the collar with slight proximal widening (Fig. 15D, mdp), median duct posterior to the collar with proximal and distal widening (Fig. 15D, md), inner duct coiled in the proximal widening (Fig. 15D, id). Distal ductus receptaculi 0.7 times the length of the vesicular area posterior to the collar (Fig. 15D, drd, drp). Pars intermedialis broader distally (Fig. 15D, pi); proximal annular crest directed to the ductus receptaculi, the distal one directed to the pars intermedialis and slightly larger than the proximal (Fig. 15D, dac, pac). Capsula seminalis globose, with a long filiform lateral projection and a minute one, both directed to the pars intermedialis (Fig. 15D, cs, pr).

Measurements: Table 4.

Distribution. Brazil (Mato Grosso, Mato Grosso do Sul) (Fig. 6).

Comments. Ischnopelta bechyneorum (Figs, 14A–B; 15A–B)is similar to I. scutellata (Figs, 9A–B; 10A–B). On males, the apex of parameres is truncated and the segment X is subcircular in I. bechyneorum (Figs. 14F–I; 14L–M), while in I. scutellata the apex of parameres is aculeiform and the segment X is subrectangular (Figs. 9F–I; 9L–M). On females, although the posterior margin of valvifers VIII is shaped as an open “V” on both, in I. bechyneorum the sutural angles are convex (Figs. 5B; 15C, vf8), while in I. scutellata they are subrectilinear (Fig. 5A; 10C, vf8).