. The Cambridge natural history. Zoology. ADEPHAGA HALIPLIDAE 209 there is a file on the inside of the wing-cases, and the Insect turns up the tip of the abdomen and scrapes the file therewith. The Insects are called squeakers in the Covent Garden market, where they are sold. Fam. 8. Haliplidae.—Antennae hare, ten-jointed; meta- stermim marked ly a transverse line; posterior coxae prolonged as plates, covering a large part of the lower surface of the abdomen; the slender, hut cluhhed, hind femora move between these plates and the abdomen. The Haliplidae are aquatic, and are all small, not exce
. The Cambridge natural history. Zoology. ADEPHAGA HALIPLIDAE 209 there is a file on the inside of the wing-cases, and the Insect turns up the tip of the abdomen and scrapes the file therewith. The Insects are called squeakers in the Covent Garden market, where they are sold. Fam. 8. Haliplidae.—Antennae hare, ten-jointed; meta- stermim marked ly a transverse line; posterior coxae prolonged as plates, covering a large part of the lower surface of the abdomen; the slender, hut cluhhed, hind femora move between these plates and the abdomen. The Haliplidae are aquatic, and are all small, not exceeding four or five millimetres in length. The ventral plates are peculiar to the Insects of this family, but their func- tion is not known. The larvae are remarkable on account of the fleshy pro- cesses disposed on their bodies; but they exhibit considerable variety in this respect; their man- dibles are grooved so that they suck their prey. In the larva of Haliplus, according to Schiodte, there are eight pairs of abdominal spiracles, but in Cnemidotiis (Fig. 95, B), there are no spiracles, and air is obtained by means of a trachea traversing each of the long filaments. The Insects of these two genera are so similar in the imaginal instar that it is well worthy of note that their larvae should be distin- guished by such important characters. Haliplidae is a small family consisting of three genera, having about 100 species; VOL. VI p. Fig. 95.—Cnemidohts caesus. England. A, Imago ; B, larva, highly magnified. {After Schiodte.). 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
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectzoology, bookyear1895
