EXTERNAL MORPHOLOGY OF TRIATOMA-RYCKMANI ZELEDON-AND-PONCE, 1972 BY SCANNING ELECTRON-MICROSCOPY

A male of Triatoma ryckmani Zeledon & Pence, 1972, was studied by scan ning electron microscopy. Only few specimens of this species are known . In this paper, some structures from the head, thorax, abdomen and di stal region of the second leg are shown. Some of them could have taxon omic importance, as the oculo-ocellar region, the buccula, the anterol ateral angle of the collar, the scutellum with the process longer than the main body, the stridulatory sulcus with an unusual backward vermi form area, and the tibia-tarsal articulation, with a spongy fossula. T he last structure was absent in specimens previously studied (Lent & W ygodzinsky 1979). Differences between this specimen and others previou sly described by several authors are dicussed.