FIGURE 4. Larval head structures and pupal gills. A–D. Simulium quimbayium n in Two New Species of Black Flies (Diptera: Simuliidae) from the High Andes of Colombia

FIGURE 4. Larval head structures and pupal gills. A–D. Simulium quimbayium n. sp. A. Cephalic apotome (dorsal). B. Hypostoma (ventral). C. Head capsule showing postgenal cleft (ventral). D. Right gill (lateral). E–H. Simulium machetorum n. sp. E. Cepahlic apotome (dorsal). F. Hypostoma (ventral). G. Head capsule showing postgenal cleft (ventral). H. Right gill (lateral).