Note k — BOOK IV. (continued 2)

Many, if not most Flies, especially those of the Flesh-Fly-kind, have a Faculty of extending their Uropygia, and thereby are enabled to thrust their Eggs into convenient Holes, and Receptacles for their Young, in Flesh, and whatever else they Fly-blow. But none more remarkable than the Horse-Fly, called by Pennius, in Mouffet, (p. 62.) Σκολιοῦρος, i.e. Curvicauda, and the Whame or Burrel-Fly, which is vexatious to Horses in Summer, not by stinging them, but only by their bombylious Noise, or tickling them in sticking their Nits, or Eggs on the Hair; which they do in a very dexterous Manner, by thrusting out their Uropygia, bending them up, and by gentle, slight Touches, sticking the Eggs to the Hair of the Legs, Shoulders, and Necks, commonly of Horses; so that Horses which go abroad, and are seldom dressed, are somewhat discoloured by the numerous Nits adhering to their Hair.

Having mentioned so much of the Generation of this Insect, although it be a little out of the Way, I hope I shall be excused for taking Notice of the long-tailed Maggot, which is the Product of these Nits or Eggs, called by Dr. Plot, Eruca glabra, [or rather Eula Scabra, it should be] caudata aquatico-arborea, it being found by him in the Water of an hollow Tree, but I have found it in Ditches, Saw-Pits, Holes of Water in the High-way, and such-like Places where the Waters are most still and foul. This Maggot I mention, as being a singular and remarkable Work of God, not so much for its being so utterly unlike as it is to its Parent Bee-like-Fly, as for the wise Provision made for it by its long Tail; which is so joynted at certain Distances from the Body, as that it can be withdrawn, or sheathed, one Part within another, to what Length the Maggot pleaseth, so as to enable it to reach the Bottom of very shallow, or deeper Waters, as it hath Occasion, for the gathering of Food. At the end of this tapering is a Ramification of Fibrillæ, or small Hairs representing, when spread, a Star; with the help of which, spread out on the top of the Waters, it is enabled to hang making by that means a small Depression or Concavity on the Surface of the Water. In the midst of this Star, I imagine the Maggot takes in Air, there being a Perforation, which with a Microscope I could perceive to be open, and by the Star to be guarded against the Incursion of the Water.