. Economic entomology. Beneficial insects; Insect pests; Thysanura. MARINE MITES. 211 CASS land, York, and Firth of Clyde, and, therefore, probably all round XIII England and Scotland. Halacarus notops {Gosse) (Pachygnathus notops, Gosse; Pachygnathus seahami, Hodge; and Pachygnathus minutus, Hod^e, larval form).— 5. Magnified sketch of ditto, copied from Gosse's figure. The body is flat, lozenge-shaped, hyaline and colourless at the margins, but the interior is almost filled with flesh of a deep blue- black hue, perfectly opaque, and of a defined sinuous outline. In the centre of the back, ju


. Economic entomology. Beneficial insects; Insect pests; Thysanura. MARINE MITES. 211 CASS land, York, and Firth of Clyde, and, therefore, probably all round XIII England and Scotland. Halacarus notops {Gosse) (Pachygnathus notops, Gosse; Pachygnathus seahami, Hodge; and Pachygnathus minutus, Hod^e, larval form).— 5. Magnified sketch of ditto, copied from Gosse's figure. The body is flat, lozenge-shaped, hyaline and colourless at the margins, but the interior is almost filled with flesh of a deep blue- black hue, perfectly opaque, and of a defined sinuous outline. In the centre of the back, just behind the head, is a bright ruby-like round eye placed in front of the opacity and between the first legs. Taken by Mr. Gosse, at Ilfracombe, and by Mr. Norman abun- dantly on weeds in rock pools, Balla Sound, Shetland. The reader may have observed, that in speaking of those eyes on the back of some of the preceding species, near the origin of the second pair of legs, we have called them eyes or supposed eyes; we did so, because we remembered that in the Oribatidae (the next section of mites), there is an organ placed very much in the same position, which for long was supposed to be their eyes, but which, when its true nature was ascertained, turned out to be not eyes, but breathing pores. We do not say that it is so in the Halacarida^, but as it may be so, we thought it as well to qualify the term with a point of Halacarus notops. Copied from Gosse's figurcc Family ORIBATID.^, or BEETLE MITES. The Oribatid?e are mites which have a hard chitonous integu- ment like that, of a beetle, and they are generally brown or black. , and shining. In their young state, some of them (Hoplo-. 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 Murray, Andrew, 1812-1878. [London] Chapman and Hall


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