. Goldfish breeds and other aquarium fishes, their care and propagation; a guide to freshwater and marine aquaria, their fauna, flora and management. Aquariums; Goldfish. AQUATIC INSECTS OF FRESHWATER Stones in the streams and feed on the larvae and nymphae of May-flies, Stone-flies and other aquatic insects. The larval stage lasts three months and longer, but the pupal stage is quickly passed, and in less than a month after the larva leaves the water to malce a cell for itself nearby, in which to undergo the metamorphosis, the adult insect or imago appears. Some of the common species of Siali
. Goldfish breeds and other aquarium fishes, their care and propagation; a guide to freshwater and marine aquaria, their fauna, flora and management. Aquariums; Goldfish. AQUATIC INSECTS OF FRESHWATER Stones in the streams and feed on the larvae and nymphae of May-flies, Stone-flies and other aquatic insects. The larval stage lasts three months and longer, but the pupal stage is quickly passed, and in less than a month after the larva leaves the water to malce a cell for itself nearby, in which to undergo the metamorphosis, the adult insect or imago appears. Some of the common species of Sialiadae, of smaller size, the Alder-flies, or Chauliodes, are , hav- ing greyish wings and featherlike antennas, and C. serricornis of a brownish - black color with white- spotted wings. Four other species are not quite so generally distrib- uted. All the Dobson larvae are carnivorous and destructive to small fishes and snails. May-Flies or Shad-Flies be- long to family of Ephemeridae, sig- nifyinglasting but a day. They have delicate m e m- branous wings, with a fine net- work of veins, the fore wings larger than the second pair, which latter. FIG. 213. J. May-fly, Heptagtnia pulchella, of the family Ephemeridae. 2 and 3. " 5««s/>y^ff!<ra, lateral and dorsal views. 4. Stone-fly, Leuctra tenella, of the family Plecoptera. 5. Caddice-fly, Phryganea intertufta, of the family Hydropsychidae. Enlarged x 6. 6. " Phryganea interrupta, Imagos at rest. Natural size. 7. ** larva. Enlarged x 5. 8. " pupal case. Enlarged x 4. 9. Black-fly, Roederiodes juncta, of the family Empididae. Enlarged x 10. 10. " larva. Enlarged x 5. 11. " pupa. " X 5. 12. " " in case. Enlarged x 5. 13. Buffalo-fly, Simulium venustus, of the family Simuliidse. Enlarged x 5. Group of pupae. 14. " larva. Enlarged x 6. H. ** Natural size. 259. Please note that these images are extracted from scanned page images that may have been digitally enhanced for re
Size: 1361px × 1837px
Photo credit: © The Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1900, booksubjectaquariu, bookyear1908
