82 
The Natural Hiftory of the Book IIL. 
The beft Method of deftroying them is to grind to Powder the Back- 
bone of a Gar-fifh, and then mix it with fomething that they like beft to 
feed upon: If they eat of this Mixture, they generally die. 
It is faid, that the 4édomen, boiled in Oil, and poured into the Ear, 
cures the Patient of any aching or throbbing Pain. 
The FirE-Fxiy, or Jack LANTERN. 
a fies ESE Flies, which are of the Glow-worm Kind, are in great 
Numter in MVorth-America wpon the Continent ; but in the 
warmer Climates fo very rare, that I have never feen any in this Ifland; 
tho’ I am credibly informed, that they are fometimes to be found here. 
The KNocKER. 
Bc HIS Fly is fomewhat larger and blacker than a Cock-Roch ; and 
derives its Name from the tinkling Noife it makes. 
The Head and Back are hard and fhining ; the former divided from 
the latter by a broad clofe Joint. ; 
As it bends its Head backward, the upper Joint falls as a regular 
Spring into the Socket of the lower; and, when it bows its Head for- 
ward, it opens with a fharp tinkling Note, as the Spring of the out- 
ward Cafe of a Watch, when preffed. 
The Harp-Back. 
GC Po IS Fly is about half an Inch long, having a very {mall Head, 
provided with Two {mall Feelers. 
Its Eyes are round, black, and fhining ; the Neck thick, and {peckled 
with White and Black: Its membranaceous Wings are defended with 
Sheaths, or Shell-wings. 
Without fuch a Covering, the exquifitely fine Texture of the Wings 
would continually be liable to be torn by the leaft Touch of an harder 
Subftance, fuch as the Blades of Canes, Corn, or the Branches of Trees. 
Its Body is fupported by Six Legs: Each of thefe, near the Extremity, 
is divided into Three clofe Joints, white, and flat underneath : Thefe are 
very finely crofs-indented, like the Surface of a File. 
~ Befides, each Foot ends in a fharp, fomewhat crooked Point ; by which 
means it f{trongly grafps its Prey. 
FIDDLERS. 
og Ro Fly, in Shape, Colour, and Number of Legs, much refem- 
bles a Cock-Roch, except that it is {maller, and longer, in propor- 
tion to its Bulk. 
