. Bulletin of the British Museum (Natural History). A COLLECTION OF MESOSTIGM ATI D MITES FROM ALASKA 297 The species collected in Alaska appears to be new to science on the basis of the chaetotaxy of the dorsal shields. The nomenclature for the chaetotaxy of the noto- gaster follows that of Sellnick (1944). Zercon fenestralis sp. nov. Female. The dorsum is entirely covered by two shields of approximately equal size. The anterior shield, the notocephale, bears 15 pairs of simple dorsal setae dis- tributed as in Fig. 17. The remainder of the chaetotaxy comprises stout coarsely serrated setae. T
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. Bulletin of the British Museum (Natural History). A COLLECTION OF MESOSTIGM ATI D MITES FROM ALASKA 297 The species collected in Alaska appears to be new to science on the basis of the chaetotaxy of the dorsal shields. The nomenclature for the chaetotaxy of the noto- gaster follows that of Sellnick (1944). Zercon fenestralis sp. nov. Female. The dorsum is entirely covered by two shields of approximately equal size. The anterior shield, the notocephale, bears 15 pairs of simple dorsal setae dis- tributed as in Fig. 17. The remainder of the chaetotaxy comprises stout coarsely serrated setae. These number six pairs, including the verticals. The lateral margins. 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 work.. British Museum (Natural History). London : BM(NH)