. Aquatic insects in New York state ; a study conducted at the entomologic field station, Ithaca, N. Y. under the direction of Ephraim Porter Felt. Insects; Aquatic insects; Dragonflies; Fishes. 268 NEW YORK STATE MUSEUM Nymph. Leng-th 34mni, abdomen 24-25mni, hiad femur - width of head , of abdomen 8mm. Head broad, concave between the eyes, and with a prominent rounded frontal shelf, whose border is fringed with stiff hairs; eyes capping the anterolateral angles of the head; sides of the head bulging behind the eyes, and regularly rounded to the slightly concave middle hind margin,
. Aquatic insects in New York state ; a study conducted at the entomologic field station, Ithaca, N. Y. under the direction of Ephraim Porter Felt. Insects; Aquatic insects; Dragonflies; Fishes. 268 NEW YORK STATE MUSEUM Nymph. Leng-th 34mni, abdomen 24-25mni, hiad femur - width of head , of abdomen 8mm. Head broad, concave between the eyes, and with a prominent rounded frontal shelf, whose border is fringed with stiff hairs; eyes capping the anterolateral angles of the head; sides of the head bulging behind the eyes, and regularly rounded to the slightly concave middle hind margin, scurfy hairy; thorax and bases of the legs very hairy; disk of the prothoracic dorsum pro- duced laterally at its ends into thin, shelflike, bristle-fringed lobes. Face blackish; sides of the mesothorax and metathorax brown, divided by a broad, vertical paler stripe (an indication of the. Fig. 16 Labium of the nymph of Cordulegaster sayi (supposition) adult color pattern, that is apt to be absent in younger nymphs); wing cases with darker pigmentation on the nodus and at the stigma; abdomen with a pale, middorsal line, bordered at either side with a row of large, brown spots>, a pair on each segment, best defined on segments 7 and 8 and largest on segment 8. Between these rows and the lateral margins on each side are two additional equidistant rows of ill defined spots, and the apical angles of each segment are washed with brown. Abdo- men little hairy beyond the middle, much less so than in d i a s- t a t o p s ; stout, straight, conspicuous lateral spines on seg- ments ,8 and 9; appendages yellow, black tipped and with a copious fringe of black hairs on their internal margins. Labium [] of the usual large size and spoon-shaped form, with five lateral setae and 11 mentals each side, the six outer-. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustratio
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectfishes, booksubjectin
