. Bulletin. Natural history; Natural history. 52 Illinois Natural History Survey Bulletin Vol. 23, Art. 1 Neureclipsis, Plectrocnemia, Polycentropus, Holocentropus, Nyctiophylax and Cyrnellus. An interesting link between the two groups, Cernotina, was recently described. KEY TO GENERA Larvae 1. Anal hooks with a row of 4 or 5 long teeth along inner ventral margin, fig. 189; tenth segment short, with scarcely any ventral margin, fig. 191; mentum forming a pair of distinct, sclerotized plates, fig. 194 Psychomyia, p. 75 Anal hooks with at most very short, inner teeth, fig. 190; tenth segment lon
. Bulletin. Natural history; Natural history. 52 Illinois Natural History Survey Bulletin Vol. 23, Art. 1 Neureclipsis, Plectrocnemia, Polycentropus, Holocentropus, Nyctiophylax and Cyrnellus. An interesting link between the two groups, Cernotina, was recently described. KEY TO GENERA Larvae 1. Anal hooks with a row of 4 or 5 long teeth along inner ventral margin, fig. 189; tenth segment short, with scarcely any ventral margin, fig. 191; mentum forming a pair of distinct, sclerotized plates, fig. 194 Psychomyia, p. 75 Anal hooks with at most very short, inner teeth, fig. 190; tenth segment longer and tubular, figs. 192, 193; mentum not divided into two scle- rotized plates, fig. 195 2 2. Mandibles short and triangular, each. 194 195. 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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