Genus Janidera Hudepohl

Janidera Hudepohl, 1988, Entomofauna, 9 (21) : 409 (type-species : Dejanira quadripunctata Th, 1864).

Diagnostic characters : head vertical, strongly constricted behind eyes; the latter large, oblong vertical, feebly notched; base of maxillary palpi acutely ridged; gena short; antennae slender, basal segments fringed ventrally; antennal support approximate; prothorax distinctively narrower than elytra, side acutely spined; the latter as wide as elytra; pronotum with a big median protuberance behind middle precede by 2 sharp tubercle side of median; elytra parallel, subtransversely truncate, disc flat, deflexed only near base, impubis and punctate; fore coxae strongly exserted; femora and tibiae linear, hind pairs 2 X as long as anterior pair; tibiae compressed anterior-posteriorly; prosternum. acutely incline to subvertical; episternum of metathorax wide; abdomen of parallel, last segment transverse, not reaching elytral apex; abdomen of tapering, last segment exposed.

Key to species of Janidera in Sarawak

1.     Prothorax entirely castaneous; elytral apex rounded with only sutural spine; fore coxal process tuberculate; hind femora with 2 spines at apex; hind tibiae straight; meso- and metasternum fusco-ochraceous; abdominal segments entirely brownish with black posterior margin. - quadripunctata (THOMSON), 1864
Prothorax castaneous at median, lateral and latero-ventral shinny black to pitchy; elytral apex subtransversely truncate with sutural and angular spine; fore intercoxal process not tuberculate; hind femora without apical spine; hind tibiae incurved at apex; side of mesothorax and entire metasternum black; basal and apical abdomen brownish testaceous, intermediate segments blackish fuscous. - biapiculata (PASCOE), 1866

Janidera quadripunctata (THOMSON)

Body entirely reddish-ochraceous; this include head, antennae, prothorax, elytra, undersurfaces and legs; head and pronotum with auratus pubescence giving a golden tinge; periphery of scutellum black; undersurfaces evenly clothed with yellowish-tawny pubescence; meso- and metasternum fusco­ochraceous; posterior margin of each abdominal margin with a narrow transverse black band.

Head strongly constricted behind eye; labrum and clypeus transverse, distinctive, same plane as frons; the latter with a triangular depression below antennal support, side boarder somewhat ridged all the way to base of mandible; gena obsolete; eye very large, oval, extending from base of mandible to vertex, finely facetted; antennifer closely approximate, area between raised and convex, side tuberculate; vertex flat; gula and ventral of neck smooth. Antenna slender; scape very long, cylindrical; 3 as long as scape; basal segments fringed ventrally with several long bristles aggregrated at apex of 1-3; 4 - 8 (9 - 11 missing) with a small ectoapical spine; 4 shorter than 3 or 5; 5 as long as 3; remaining segments decrease in length. Prothorax impunctate; narrower than apex; slightly longer than broad; apex narrower than base; side with an acute and sharp tubercle a little behind middle; in front with a blunt protuberance; pronotum elevated with 2 pointed tubercle side of median; behind the latter a rounded protuberance with depressed posterior margin; prosternum aculately incline; fore intercoxal process tuberculate and vertical at posterior. Scutellum lengthen triangular; glabrous. Elytron 5 X as long as broad; elevated near suctellum to the level of humeral; parallel; rounded at apex and dehiscent at 1/4 from apex; shortly deflexed near basal half, apical half fastigate; disc almost impubis except a longitudinal marginal stripes of pubescence; coarsely punctate near base, apical half punctulate. Legs : femora cylindrical, slender, punctate and subpubescent; hind femora 2 X as long as the first two pairs with 2 apical spines; tibiae compressed antero-posteriorly; front pairs linear; hind tibiae gradually widen towards apex, straight; fore coxal cavity angulate externally; fore coxae transverse.

Measurement : Length 22.0 - 24.0 mm (); breadth 7.0 - 8.0 mm ()

Distribution : Sarawak; Java; Peninsular Malaysia (Malacca)

Note : only this tribe has the tibiae compressed anterior-posteriorly instead of the usual lateral compression; body at side view deepest at anterior of metathorax and ventral margin gradually incline towards apex while the elytra stay horizontal.

Material examined : 2 Kuching, Kuching Div., III.1900 (SM Coll.); Santubong (2000 ft), Kuching Div., II. 1900 (SM Coll.).

Janidera biapiculata (PASCOE)

Dejanira biapiculata Pascoe, 1866, Proc. Zool. Soc. Lond., : 507 (loc. cit.). - Aurivillius, 1912, Coleopt. Cat., 39 : 253.

Dejanira fossulata Villiers, 1966, Anns. Soc. Ent. Fr. (N. S.), 11 (2) : 355 - 359 (loc. cit.)

Janidera biapiculata : Hudepohl, 1988, Entomofauna, 9 (21): 409.

Entire head, antennae and elytra reddish-ochraceous; neck with a lateral blackish strip; auratus pubescence on head and dorsal of prothorax giving an golden tinge; pronotum with a wide median longitudinal reddish-ochraceous stripe that envelope the dorsal tubercle; side of prothorax and latero-ventral black to pitchy; prosternum reddish-ochraceous; side of meso- and entire metasternum black except mid intercoxal process that is ochraceous; base and apex of abdominal segments testaceous; intermediate segments fuscous to blackish.

Head vertical; labrum narrow, transverse; clypeus wide, trapezoid; frons oblique to clypeus, raised between antennal support, planate, side not tuberculate; gula transversely striate; eye large; gena short. Antenna longer than body in with segment 8 reaching elytral apex, as long as body in with segment 8 reaching only 2/3 of elytra; basal segment of both sexes fringed ventrally with aggregrated bristles at apex of segment 1 - 3; antennal segments of slender, filiform, shorter and wider or feebly complanate; 3 as long as scape; 5 longer than 3; 6 - 10 subequal to 5. Prothorax longer than broad; apex as wide as base; side with 2 sharp tubercles, as wide as elytra; pronotum with 2 pointed tubercles side of median and a wide but shallow median pit near base; latero-dorsal of blackish stripe coarsely punctate; remaining area impunctate; fore intercoxal process not tuberculate, vertical at posterior. Elytron 6 X as long as broad; humeral angle same level as scutellum; parallel; apex obliquely truncate with sutural and angular cusp; sutural half of disc flat, declivently deflexed after a longitudinal costate in the middle; punctate, coarser near base and becoming finer to punctulate towards apex. Legs : fore coxal cavity angulate; femora feebly compressed laterally, sublinear, punctate; hind femora 2 X as long as anterior pairs, without apical spine; tibiae compressed anterior­posteriorly especially hind pair; the latter incurved at apex.

Measurement : Length 19.0 mm (); 23 mm ()
Breadth 4.5 mm (); 6.0 mm ()

Distribution : Sarawak; Peninsular Malaysia (Penang)

Material examined : 1 Kuching, Kuching Div., I.1907 (SM Coll.); 1 Kuching, Kuching Div., 25.IV.1903 (SM Coll.).