. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology. 260 Figure 255. Ventral view of abdominal segments VIII through X of first instar B. balli. Scale bar = 200 ^m. Figure 256. Ventral view of abdominal segment IX of first instar B. cannula. Same scale as Figure 255. Figures 257. Urogomphi of first instar B. balli, dorsal view. Same scale as Figure 255. Figures 258-260. Urogomphi of second instar Bracteon, dorsal view. Figures 258-260 at same scale; scale bar = 200 ^m. 258. B. balli. 259. B. lapponicum. 260. B. Please note that these images are extracted from


. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology. 260 Figure 255. Ventral view of abdominal segments VIII through X of first instar B. balli. Scale bar = 200 ^m. Figure 256. Ventral view of abdominal segment IX of first instar B. cannula. Same scale as Figure 255. Figures 257. Urogomphi of first instar B. balli, dorsal view. Same scale as Figure 255. Figures 258-260. Urogomphi of second instar Bracteon, dorsal view. Figures 258-260 at same scale; scale bar = 200 ^m. 258. B. balli. 259. B. lapponicum. 260. B. 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 Harvard University. Museum of Comparative Zoology. Cambridge, Mass. : The Museum


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Keywords: ., bookauthorharvarduniversity, bookcentury1900, booksubjectzoology