Madates quadricarinata, RIDER, 2006

Madates quadricarinata nov.sp. ( Figs 4, 14-17)

Description. Ovoid, black with pale yellow markings ( Fig. 4).

Head subtriangular, tapering to rounded apex, lateral margins relatively straight, slightly reflexed; jugal apices converging over apex of tylus, but not contiguous; tylus slightly longer than juga. Eyes substylate, basal area of each stalk slightly depressed. Ocelli relatively small and placed rather distantly from adjacent compound eye. Dorsal surface of head nearly impunctate, with at most a few sparse punctures on vertex, and a few oblique transverse wrinkles on juga; vertex slightly convex. Dorsal surface of head black with longitudinal yellow band running down middle of each juga, stopping just short of base of head; a short oblique, transverse yellow band on each side running from jugal yellow band to lateral margin just in front of each compound eye, thus leaving small black triangle near lateral margin on each side, apex of which does not extend beyond apex of adjacent antennifer. Antennae entirely black, segment I reaching to near apex of head.

Anterior margin of pronotum concave, obtusely carinate, separated from disk of pronotum by row of deep punctures. Anterolateral pronotal margins nearly straight, reflexed, separated from disk by row of punctures; anterior pronotal angle, each with minute, laterally projected tooth. Dorsal pronotal surface black except: all margins narrowly pale yellow, a transverse pale yellow band behind pronotal calli, and a medial, longitudinal yellow band which may be slightly orangish, thus forming four black quadrate spots, posterior pair larger than anterior pair ( Fig. 4); lateral margins of spots not quite reaching submarginal row of punctures. Anterior disk of pronotum impunctate, except posterior disk with a few shallow, coarse punctures.

Scutellum triangular, basal third slightly tumescent, nearly impunctate, remainder coarsely punctate, some punctures forming transverse rugose lines, apex narrowly rounded. Scutellum black with apex, sublateral margins (extreme lateral margins very thinly black), and a narrow longitudinal line pale yellow ( Fig. 4). Surface of hemelytra more uniformly punctate except small area near apex of r + m vein impunctate. Surface of corium black except for the following pale yellow areas: embolar region from base to about middle of corium, this continuing along r + m vein and then bifurcating near apex of r + m vein, a thin streak continuing to apex of corium, and a broader band curving mesad and continuing to inner basal angle near apex of scutellum; a thin streak along claval suture, and another thin, more lateral streak parallel to claval suture; a band along apical margin of corium; and sometimes a short, thin streak from transverse band to apical margin near inner basal angle ( Fig. 4). Hemelytral membranes fumose, hyaline distally. Connexiva entirely pale yellow, completely covered by hemelytra at rest.

Ventral surface of head impunctate, pale yellow with black markings around each compound eye, on and around each antennifer, and a band along base of bucculae. Rostrum reaching between or slightly beyond hind coxae, segment I reaching beyond apices of bucculae; segments II-IV fuscous to black, segment I black on dorsal two-thirds, yellow on ventral one-third (when viewed in resting position). Prosternum slightly depressed medially with low, vague, obtuse carina on each side, forming v-shape, anterior ends continuing as distinct, obtuse carina along each anterior propleural margin; mesosternum medially carinate, somewhat tumescent on each side of carina, glabrous; metasternum flat medially, medial areas of prosternum, mesosternum, and metasternum covered with short appressed hairs. Thoracic pleura yellow with large black spots laterally, those on propleura and mesopleura usually intruded medially by long yellow streak or band, also some black spots near base of coxae. Ostiolar opening reduced, unattended by ruga; evaporative areas reduced to small finger-like area caudad of opening, and an elongate, narrow band along anterior margin of metapleura. Coxae brown with pale areas apically, remaining leg segments black with more or less obscured yellow, longitudinal streaks. Abdominal venter unarmed medially, impunctate, yellow with two series of large black spots on each side, medial pair on segment VII fused into single medial black spot. Posterolateral abdominal angles rounded, not produced.

Posteroventral surface of pygophore divided into two halves by shallow, transverse depressed area, dorsal half yellow, ventral half black, except yellowish near middle, depressed area not interrupted medially by tumescence, nor laterally by oblique ridges ( Fig. 14). Posterior margin of pygophore in caudal view obtusely sinuous, with medial, U-shaped depressed area, this depression also having a smaller U-shaped emargination ( Fig. 14). Posterior lobe of each paramere robust, short, with four longitudinal ridges; apex obtusely rounded ( Figs 15-17). Anterior lobe slightly elongate, black teeth along rim of bowl, apical tooth slightly larger than others. Proctigeral surface distinctly concave, anterior margin with small Ushaped emargination medially; anterior half of proctiger expanded laterally, distinctly wider than posterior half of proctiger ( Fig. 14). Superior ridge of pygophore narrowly convex over anterior margin of proctiger. Basal plates large, somewhat tumescent, inflated area black, lateral angles yellow; posterior margins transverse, slightly sinuous, mesial margins nearly contiguous except basally separated; surface near mesial margins with numerous long hairs. Ninth paratergites relatively broad, curving inwards, apices broadly rounded, protruding slightly beyond apex of abdomen; eighth paratergites lacking spiracles; posterolateral angles rounded, not produced.

Measurements (mm). Total length 11.51- 13.37 (12.00); width across humeri 6.93-7.71 (6.93); width across abdomen 7.81-8.34 (7.81); medial length of pronotum 2.39-2.76 (2.39). Medial length of scutellum 4.99-5.72 (4.99); basal width 3.96-4.51 (4.21); width at distal end of frena 1.08-1.37 (1.08). Length of head 2.15-2.34 (2.15); width 3.05-3.34 (3.05); interocular width 2.01-2.25 (2.01); interocellar width 0.89-1.01 (0.89); ocellar diameter 0.12 (0.12); distance from ocellus to adjacent eye 0.53-0.65 (0.53). Length of segments I-V of antennae 0.96-1.13 (0.96), 1.70-1.82 (1.76), 2.22-2.53 (2.38), 2.72-3.03 (na), and 2.66-2.79 (na) respectively. Length of segments I-IV of rostrum 1.15-1.38 (1.23), 1.96-2.07 (2.02), 0.94-1.09 (0.94), and 1.22- 1.41 (1.27) respectively.

Distribution: northeastern India, Myanmar.

Holotype: ♂, labeled a) “Upper Burma: Nam Tamal Valley, 22.IX.1938, R. Kaulback. B.M. 1938-741.“; b) “Alt. 3,000 ft. Lat. N. 27°42’. Long. E. 97°4’ ( BMNH) . Paratypes (2♂♂, 2♀♀): India: Assam (1♀, ZMHB) . Myanmar: (2♂♂, ZMAS) . Bengalia, Altona L. (1♀, USNM) .

Etymology. The specific name, quadricarinata, refers to the four longitudinal ridges on the posterior lobe of each paramere.

Comments. This species is somewhat isolated in the genus; its size and coloration resembles M. limbata and M. heissi nov.sp., but the shape of the paramere is similar to M. parva nov.sp.. It differs from M. parva nov.sp. by lacking the medial tumescence on the posteroventral surface of the pygophore, and from M. heissi nov.sp. by the lack of the lateral, narrow ridges on the same surface. The posterior lobe of the paramere is much shorter in this species than in M. limbata , and it has four longitudinal ridges along the shaft; all other species have three ridges or fewer.