. Bulletin. Natural history; Natural history. August, 1944 Ross: Caddis Flies of Illinois 135 138 Apex of eighth segment only minutely serrate; claspers not projecting and upturned, fig. 489 6. Apex ot aedeagus bulbous, with both apical processes smooth, the larger one short and stout; plate formed by claspers narrow, fig. 488 grisea, p. Apex of aedeagus only slightly en- larged, with a long, smooth process and a round, platelike, serrate one; plate formed by claspers much wider, fig. 489 novasota, p. 138 7. Ninth sternite produced to form a long, narrow, ventral internal plate which is four o
. Bulletin. Natural history; Natural history. August, 1944 Ross: Caddis Flies of Illinois 135 138 Apex of eighth segment only minutely serrate; claspers not projecting and upturned, fig. 489 6. Apex ot aedeagus bulbous, with both apical processes smooth, the larger one short and stout; plate formed by claspers narrow, fig. 488 grisea, p. Apex of aedeagus only slightly en- larged, with a long, smooth process and a round, platelike, serrate one; plate formed by claspers much wider, fig. 489 novasota, p. 138 7. Ninth sternite produced to form a long, narrow, ventral internal plate which is four or five times as long as the posterior part of the segment, fig. 490 zeronia, p. 139 Ninth sternite not produced into such a long plate, the interna! narrowed part never more than twice the length of posterior portion of seg- ment, fig. 491 8 .Aedeagus with a long, stout tooth just beyond neck, fig. 491 verna, p. 139 Aedeagus without a tooth; at most with a short, slender thread, fig. 492 9 Aedeagus with a neck, a weak, slender thread and a slender apex tipped with a small plate, fig. 492 forcipata, p. 139. Figs. 491-493.—Oxyethira, male genitalia, aspect; D, aedeagus. OUALIS 4, lateral aspect; 5, ventral aspect; C, dorsal. 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 Illinois. Natural History Survey Division. Urbana, State of Illinois, Dept. of Registration and Education, Natural History Survey Division
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