. 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. AQUATIC INSECTS IN NEW YORK STATE 453 â aa Tracheal gills on ventral side of the first seven abdominal segments; last pair of spiracles not raised on respiratory tubes nor on conical folds 6 Antenna* vfith five segments Neuromus 66 Antennae with six segments Oorydalis Egg masses^ a Mass not covered Chauliodes «a Mass normally covered with a whitish coat of albuminous matter Oorydalis Eggs a Micropylar
. 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. AQUATIC INSECTS IN NEW YORK STATE 453 â aa Tracheal gills on ventral side of the first seven abdominal segments; last pair of spiracles not raised on respiratory tubes nor on conical folds 6 Antenna* vfith five segments Neuromus 66 Antennae with six segments Oorydalis Egg masses^ a Mass not covered Chauliodes «a Mass normally covered with a whitish coat of albuminous matter Oorydalis Eggs a Micropylar projection distinctly at one side of apex; necis less than half the width of micropylar surface [] ...Chauliodes â¢00 Micropylar projection near the apex; necli nearly as broad as micropylax surface []" Oorydalis CHATinoDEs Latreille Adult. Smaller than Oorydalis; body 20 to 40 mm long, the male often being smaller than the female. Prothorax quadran-. ⢠strfA '"A Fig. 24 Fore wing of ChauUodes x3 gnlar, narrower than the head, and shorter than the mesothorax andmetathorax combined; no toothed angle on sides of the head; three large approximate ocelli facing at about 120° from each other; antennae moniliform serrate, pectinate, or flabellate; mandibles not prominent, concealed by the labrum when closed; wings numerously veined, the accessory veins of the radial sector extend backward from Bj in both pairs of wings; radial sector with four to six branches, and medius always with only two branches [flg. 24]; cross veins between all the branches of radius varying in different species, from seven to about 20; hind wings broiad at base and folded in the anal area when at rest; alar ex- panse 50 to 90 mm; tarsi cylindric, five jointed; caudal append- ages conical, stout, inferior pair often simple in both sexes, supe- rior pair simple in female and slightly prehensile in male. lEggs of Neuromus have never been Please note that these images
Size: 2285px × 1093px
Photo credit: © The Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1900, booksubjectfishes, booksubjectin
