. Bulletin of the British Museum (Natural History) Entom Supp. . 288 290 Figs. 283-290. Larval characters of African Simulium. 283, dorsal view of head in sub- genus Lewisellum showing shape of cephalic apotome and negative pattern. 284, body shape in profile in subgenus Lewisellum. 285, apex of abdomen in subgenus Phoretomyia showing ventral orientation of posterior circlet. 286, dorsal view of head in copleyi- group of subgenus Phoretomyia showing straight ' cut-off ' cephalic fans. 287, profile of unusual body shape in albivirgulatum-group of Metomphalus. 288, antenna of forms with short th
. Bulletin of the British Museum (Natural History) Entom Supp. . 288 290 Figs. 283-290. Larval characters of African Simulium. 283, dorsal view of head in sub- genus Lewisellum showing shape of cephalic apotome and negative pattern. 284, body shape in profile in subgenus Lewisellum. 285, apex of abdomen in subgenus Phoretomyia showing ventral orientation of posterior circlet. 286, dorsal view of head in copleyi- group of subgenus Phoretomyia showing straight ' cut-off ' cephalic fans. 287, profile of unusual body shape in albivirgulatum-group of Metomphalus. 288, antenna of forms with short third segment. 289, antenna of forms with long slender third segment. 290, antenna in subgenus Xenosimulium, showing secondary Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original British Museum (Natural History). London : BM(NH)
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