The History of A N I M A L 8.

It is common in cheese, in flour, and in many other substances. Authors call it,simply, Acarus. .

The Weep-tttk.

The Acarus of the sheep.

The body is flat, of a roundish figure, but somewhat approaching to oval, and of

a yellowish white colour, and has a single large round spot on the back : the anus isvisible in the lower part of the body; the thorax is scarce conspicuous; the head isvery small and black; the mouth is bifid : the antennæ are of a clavated figure, andof the length of the shout; the legs are short and black. The animal, in the whole,much resembles the common dog-tick ; but it’s snout is longer, and it’s body never be-comes so distended as that of the other with fucking, but always continues flat.

It is common on sheep, and it’s excrements stain the wool green : it will live in the'wool many months after it is shorn from the animal. Charleton, Mousses, andothers call it Reduvius.

Acarus InseSlorum rufus am albicante . , 5T|)e %0Uft Of

Ihe brown Acarus of Infests, with a white anus . I )ZZtlt+

This is an extreamly minute Insect ; it’s body is round, reddish, and covered witha firm and hard skin; the head is very small, the neck scarce visible ; the legs are mo-derately long; the anterior pair longer than the others: it has a whiteness about the

anus.

It is frequent on the bodies of many Infects, which it infests, as the louse does others;it runs very. swiftly : the humble-bee, and many other of the larger Insects, are con-

tinually infested with it; but none so much as the common black beetle, which hasthence been called the lousy beetle. Lister calls it, Pediculus subflavus scarabæis infestus ;Blankard, Pediculus Insectorum volatilium ; in the Acta tJpsaliensia, it is much moreproperly named Acarus Insectorum.

Acarus arboreus ruber distentus ,

Xijt scarlet tree

■j

The red \ distended , tree Acarus, f £01 tC*

This is a small species j the body is roundish, and the back not at at all flatted, asit is in many others; the skin is smooth, shining, and glossy, and the whole animalseems distended, and ready to burst; the colour is a bright red, but a little duskier onthe sides than elsewhere : the head is very small, and the legs short : there is on eachside a small dusky spot near the thorax, and a few hairs grow from different parts ofthe body.

It is very common on trees, particularly on the currant, on ihe fruit of which wefrequently fee it running.

Acarus petrarum ruber ante?mis longiortbus. 50)0

1he red , stone Acarus , with long antennæ. tllttt*

This is very small, and of a bright red colour; the body is round and distended;the head is very small and pointed ; the legs are moderately long, and of a paler redthan the body : the antennæ are much longer than in any other species. In thegreater number of the others, indeed, they are scarce conspicuous; these also, and themouth, are of the same pale red with the legs.

It is frequent about old stone walls and on rocks, and runs very nimbly.

Acarus aquaticus ruber abdomine deprejfo.The red water

The scarlet WaterWire.

This is a small species: the body is of a figure approaching to an oval, and the backappears depressed ; it is of a bright and strong scarlet colour. The head is small; thelegs are moderately long and firm, and are of a paler red than the body.

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