brown and their furface fomewhat lucid. On ex- 

 amination by the microfcope, I found that the fpe- 

 cies was different from any I had before examined. 

 It is perhaps one of the moft curious of the whole 

 genus. In lize it fcarce exceeds the acarus liro or 

 common mite. The body is oval, depreifed, and 

 acuminated forwards. The legs are remarkably 

 flender, and are befet on the firft and fecond joints 

 with ftrong briftles, gradually thickening towards 

 their extremities, and which, when very much mag- 

 nified, appear ferrated throughout their whole length 

 in the manner of the awns of barley, while the re- 

 maining joints are furnifhed with very long fharp- 

 pointed ones ; and the tarfi or ultimate joints, in- 

 ftead of being terminated by hooked claws, as in 

 moft other fpecies, run out into three very long, 

 ftrait, and fharp briftles, as reprefented in the 

 figure. On the body are placed feveral briftles of 

 the fame form with thofe on the upper joints of the 

 legs. The palpi or cheliform parts near the head 

 are very thick and ftrong, each being terminated by 

 a ftiarp, long, incurved claw or procefs, accompa- 

 nied by feveral briftles. The fore legs exceed the 

 others in length. This infed feems admirably caU 

 culated for its peculiar habitat on the wings of lepi- 

 dopterous infedls ; its long and flender legs readily 

 infinuating themfelves amongft the fcales of the 

 wings, and the ferrated briftles undoubtedly contri- 

 buting to its clofer adhefion, and fecuring it from 

 being fhaken off" the wing during the infect's flight. 

 The moth on which this curious acarus was dif- 

 covered is amongft the phalaenee rufticas of Lin- 

 naeus, 



