Isoforma subgilva OPITZ nov. sp.

(Figs 74, 159, 175)

Holotype: ♀. St. Paulo d’ Olivenca (Brazil), M. de Mathan, Juin-Juiliet 1883 (MNHN).

Diagnosis: Within Isoforma only in the members of this species is the mostly flavotestaceous pronotum adorned with two very proximate vertical, centrally located, black lines.

Description: Size: Length 12.0 mm; width 6.0 mm. Form: As in Fig. 159. Color: Cranium dark testaceous; pronotum mostly flavotestaceous, with two slightly separated paralateral dark brown lines; elytral bicolorous, basal half testaceous, distal half black. Head: Antennal capitulum very long (Fig. 74), each capitular antennomere longer than funicle; antennal carina very prominent; frons slightly wider than eyes; EW/FW 23/26. Thorax: Pronotal anterior margin linear, not projected at middle; side margins of disc rounded at middle; PW/PL 82/68; elytra moderately flared; discal carinae slightly developed; EL/EW 290/95. Abdomen: Female pygidium not incised at distal margin.

Natural history: The holotype was collected within a June-July time frame.

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

Etymology: The trivial name subgilva is a Latin adjective derived from prefix - sub (= less than) and gilvus (= yellow). I refer to the elytral color.