. Fresh-water aquaria: their construction, arrangement, and management, with full information as to the best water-plants and live stock to be kept, how and where to obtain them, and how to keep them in health. Aquariums. LABV^ OF WATEE-PLIES. 243. Fig. 152. Phryganea grandis. species, nor is it necessary, for reference to a few of them will be quite sufficient to remind those who do know, or to show those who do not know, how very interesting the lai-vse of the Caddis-flies are. The worm of Phryganea grandis makes a cylindrical case (a. Fig. 151) of almost equal diameter throughout, and forms
. Fresh-water aquaria: their construction, arrangement, and management, with full information as to the best water-plants and live stock to be kept, how and where to obtain them, and how to keep them in health. Aquariums. LABV^ OF WATEE-PLIES. 243. Fig. 152. Phryganea grandis. species, nor is it necessary, for reference to a few of them will be quite sufficient to remind those who do know, or to show those who do not know, how very interesting the lai-vse of the Caddis-flies are. The worm of Phryganea grandis makes a cylindrical case (a. Fig. 151) of almost equal diameter throughout, and forms it of portions of leaves ajid other vegetable matter arranged spii-ally. This larva and its case are generally found in ponds or very slow-running streams. The insect, in common with many others, has the habit of turning itself while within its tube, so that it can protrude its head at either end. Phryganea grandis (Kg. 152), about the largest British species, is a little more than Jin. long, and its wings, when expanded, are at least 2in. from tip to tip. It is one of the com- monest and handsomest of the Caddis-flies. It may be known by its ash-coloui-ed anterior wings, brown posterior wings, and yellow-ringed antennsB. Like aU its relatives, it folds its wings alongside of its body when at rest. The larvae of P. obsoleta, P. striata, and all of the family, make the same kiad of cases as that of P. grandis. P. minor is the smallest member of the Phryganeidse. It is rather a handsome insect. Its anterior wings are spotted. The larvae of the large and well- known family of the Limnophilidie make cases very varied in their con- struction. They may be found either ^'"earva ^LiMNOPHilus i^ stagnant or quick-running water. RHOMBiccs. The case of the lAmnophilus rhombicus (Fig. 153) is rather common and cum- bersome. It is made of pieces of vegetable fibre, pieces of stick or twigs of various thickness, bits of grass, and portions of moss. These are all cut about the same leng
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectaquariu, bookyear1890
