. The Cambridge natural history. Zoology. XX HEMEROBIIDES 467. The genus Sisyra forms for some Neuropterists the type of a separate group called Sisyrina, though by others it is placed, as we have said, with the Osmylina, though it is destitute of ocelli. The larvae of at least one species of this genus are aquatic, and have been found in abundance living in Sjpongilla (^Ephydatia) fiuviatilis, a fresh-water sponge; when discovered their nature was not at first recognised, as they possess on each ventral segment a pair of articulated appendages, look- ing like legs, but which are considered to
. The Cambridge natural history. Zoology. XX HEMEROBIIDES 467. The genus Sisyra forms for some Neuropterists the type of a separate group called Sisyrina, though by others it is placed, as we have said, with the Osmylina, though it is destitute of ocelli. The larvae of at least one species of this genus are aquatic, and have been found in abundance living in Sjpongilla (^Ephydatia) fiuviatilis, a fresh-water sponge; when discovered their nature was not at first recognised, as they possess on each ventral segment a pair of articulated appendages, look- ing like legs, but which are considered to be more of the nature of gills. The sucking-spears of this Insect are so long and slender as to look like hairs; whether the little animal draws its nutriment from the sponge, or merely uses this latter as a place of shelter, is not ascertained. 4. Hemerobiina : a somewhat num- erous group of small or more rarely moderate-sized Insects, with moniliform antennae, no ocelli, a complex and comparatively regular system of wing-nervures; the veinlets are especially numerous at the margins, owing to the mode of forking Fig. 311. — Larva of Hemerohius sp. from Kent. A, The larva bare ; B, the same, partially concealed by the remains of its victims, etc. ; a portion of tlie cover- ing has been removed in order to show tlie head. A B of the nervures there (Fig. 298, Drepanepteryx phalaenoides). The larvae of most of the species of which the habits are known Fig. 310.—A, Larva of Sisyra fuscata, ventral aspect; B, an abdominal appendage. (After Westwood.). 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 Harmer, S. F. (Sidney Frederic), Sir, 1862- ed; Shipley, A. E. (Arthur Everett), Sir, 1861-1927. ed. [London, Macmillan and Co. , Limited; New York, The Macmillan Company
Size: 1170px × 2136px
Photo credit: © The Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdecade1890, booksubjectzoology, bookyear1895
