ACANTHUS, ACARUS. 135 



By this exercise the student will acquire the habit of 

 accurate investigation, and will become as well acquaint- 

 ed with the science, as if he set down the right name at 

 first. If we know a man by a wrong name for some 

 time ; the memory is not at all embarrassed with the 

 \vrong name, after we are enabled to substitute the right 

 one. Much pleasure arid profit will be derived from a 

 comparison of our own descriptions with those we may 

 afterwards find in systematic works ; and we learn the 

 application of terms by this method better than by any 

 other in use. 



A. 



4 3. A^AX^ite. Spec. i. 



spinus, (barley-bird,) head black, neck and back 

 green, breast and throat greenish-yellow, belly 

 white, tail yellow beneath. Small. Fringilla 

 spinus of Lin. 



See MS. P. 



1 2. ACARUS. Spec, about 100. 



americanus, (tick,) obovate, ruddy, scutella and 



joints of the legs white. A small insect on cat- 



tle and horses. 

 aphidioides, (red mite,) fore legs long ; abdomen 



terminating in two horns ; colour red. Small. 



In decaying wood. 

 ricinus, (dog-tick,) globe-ovate, livid, a round 



brown spot at the base. 

 siro, (cheese- mite, Uvhitish ; head and thighs rust- 



colour ; abdomen bristly. 

 scabwi) (itch-mite,) white ; legs reddish ; 4 hind 



ones with a long bristle. 



