Isoforma biguttula OPITZ nov. sp.

(Figs 24-26, 69, 123, 124, 154, 175)

Holotype: ♂. Teffe ( Ega), Amazonas (Brazil), M. De Mathan, 1 st Trimester, 1879 (MNHN).

Diagnosis: The holotype has the black elytral macula extended to the anterior third of the elytral disc. No other available specimens of this genus have this characteristic. Also, only in the available specimen of this species is the cranium entirely testaceous.

Description: Size: Length 9.0 mm; width 4.0 mm. Form: As in Fig. 154. Color: Cranium flavotestaceous; pronotum flavotestaceous; elytral disc mostly black, basal third flavotestaceous. Head: Antennal capitulum very long (Fig. 69), each capitular antennomere longer than funicle; antennal carina very prominent; EW/FW 15/30. Thorax: Pronotal anterior margin linear, not projected at middle; side margins of disc rounded at middle; PW/PL 70/50; elytra conspicuously flared, discal carinae faintly developed; EL/EW 245/125. Abdomen: Male pygidium not incised at distal margin; aedeagus (Figs. 123, 124) short; tegminal lobes uncinate; phallobasic rod long and broad.

Distribution (Fig. 175): Known only from the type locality.

Etymology: The trivial name biguttula is a Latin adjective derived from the prefix bi- (= two) and gutta (= spot). I refer to the two black spots on the elytral disc.