i?6 R D £ R V. Tenth -recto; 



Scopoli, who has only defcrjbed a fmall 

 number of Tenthredines, has divided them 

 into two families ; the firft containing thofe 

 with elavated, the other, thofe having fili- 

 form antenna, with kven or eight articula- 

 tions : thefe lad, he obferves, turn afide, or bend 

 downwards their antennas, when under appre- 

 henfions of danger. The different fexes in this 

 genus are in general differently coloured, which 

 circumftance renders the knowledge of the 

 fpecies very difficult. 



The larva of the Tenthredo differs entirely 

 from that of all the other Hymenopterous infects* 

 and refembles that of the Butterfly and Moth fo 

 much as eafily to be miftaken for one of them : 

 this refemblance has induced fome Entomolo- 

 gifts, who had attributed the term caterpillar 

 to the larvse of lepidopterous infects alone, to 

 call thofe of the Tenthredo falfe caterpillars ; 

 there is neverthelefs one certain rule to diftin- 

 guifli them by, that is, by examining the num- 

 ber of their feet ; thefe, in the true caterpillar* 

 never exceed fixteen, and are feldom fo many ; 

 thofe of the falfe one, on the contrary, always 

 exceed that number, being generally from eigh- 

 teen to twenty -two : the fix firft, or pectoral 

 ones,are hard, or fcaly, and terminate each in a 

 point, as thofe of the true caterpillar % the re- 

 maining 



