. Marvels of insect life [microform] : a popular account of structure and habit. Insects; Insectes. 24 Marvels of Insect Life. mration of the blood, for the creature is without the spiracles or breathing holes of land Insects. When this aquatic larva is fully g'^wn, it leaves the water and searches for a suitable spot in which it can form a cell. Here it changes to a chrysalis, which shows the wings and other rhararters of the perfect Insect. In this stage it is quite inactive, but after an interval it again casts its skin and emerges fully developed as an alder-fly.' It is evervwhere common i
. Marvels of insect life [microform] : a popular account of structure and habit. Insects; Insectes. 24 Marvels of Insect Life. mration of the blood, for the creature is without the spiracles or breathing holes of land Insects. When this aquatic larva is fully g'^wn, it leaves the water and searches for a suitable spot in which it can form a cell. Here it changes to a chrysalis, which shows the wings and other rhararters of the perfect Insect. In this stage it is quite inactive, but after an interval it again casts its skin and emerges fully developed as an alder-fly.' It is evervwhere common in the neighbourhood of water. There is a second species^ nf darker hue, which appears to be less common, though from their general similarity it is probable that the two are frequently confused. Though these flies measure only an inch across the expanded wings, there are near relations (in another genus') in America and India which are much larger, and, from the enormous development of jaws, of formidable appearance. These jaws are equal in length to the united measurement of the fore-body and hind-body. In their earlier stages their forms and habits are much like those of the alder-fly; and the same may be said for the ultimate stage, except that the extraordinary jaws so well shown in our photograph on page 21 have no counterpart in the alder-fly, and their purpose has not yet been made plain. Giant Water-Bugs. Whoever has interested himself in the Insect life of an average pond has certainly become acquainted with a number of interesting aquatic representatives of the bug family.* The boatman, the water-scorpion, the water-measurer, and the water-crickets are the species that are most likely to have attracted attc on. > Sialis lutaria. ' S. fuhginosa. â Corydalis. * Hemiptera. Head of Cian. Water-Bi'g- nil shoutdrn of Ihi' KJaiit bilg ai [I-:, sup, ^own. piilantvd four or Wkinn bpak. but thr bfak |f licsalonK thv uiid<r .Ido when not in me. Tlie â Irdiwly
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectinsects, bookyear1915
