36» OBSERVATIOT^S ON SUNDRY PLATES 



The BLUE-BOTTLE FLY, magnified. 



a. Its protuberant pearled eyes, 



B, The foreheadj fcaly and prominent between the eyes, furniflied 

 with ftrong black briflles -, from this grow two oblong parts d dy having 

 joints into the forehead. Thefe in the head of the drone fly were called 

 horns, 



e e. Tufts of bufliy briftlesor feathers growing from dd. 



ff. Four flrong briftles placed in pairs, and bending toward each other 

 jufl above the opening of the mouth. 



g h i. The trunk or probofcis ifluing from the middle of the mouth, 

 apparently hollow, and by its joints projected or withdrawn at plea- 

 fure. From h tot feems divided into two lips, covered with hairs; 

 thefe lips open or fhut cafily, and hold little pieces of folid food ; but 

 •when the fly fucks liquid, fhe fpreads them open, and applies their hol- 

 low part to the body on which fuch liquid is, as on fruit, &c. whereby 

 they become a kind of pump. 



k k. Two little hairy oblong projeftions growing within the mouth, 

 . on each fide the probofcis ; thought by Dr. Hooke to be the organs of 

 fmelling or feeling (as G G, in the foregoing plate). 



The thorax of this fly is cruflaceous, ftrongly made, its brifl:les (land- 

 ing backward like the quills of a porcupine j has flx legs, covered with 

 a hairy ihcll, each having eight joints, at the end of which are its claws, 

 and folcs which are fpungy. 



Of thefe fix legs the fly feldom employs more than four to walk with; 

 the two foremofl: anfwering many of the purpofes of arms and hands. 



The TUFTED GNAT, magnifed, 



a. Its head, fmall in proportion to its body, conflfting chiefly of two 

 clufters of pearled eyes : jufl: over thefe eyes, and fomewhat between 

 them, are two black balls, from whence iflue two long horns, tapering 

 and jointed like the horns of a lobflier : from thefe joints arife fmall ftiff 

 hairs in a regular order. 



h. Is two other jointed horns, or feelers, projefting over the pro- 

 bofcis f, which is a cafe covered with long fcales, and, when not in ufe, 

 concealed under the throat : its fide opens, and emits four darts occa- 

 iionally, one being a flieath to the other three : they are barbed toward 

 the point. This head, with its appurtenances, is united to the thorax by 

 a fhort neck, 



4 The 



