20S FAMILI^. (Jpis. **. e. i.) 



recent insect from one that has been long disclosed : 

 this may often be done by inspecting the state of 

 its wings, for in the latter, especially in males, they 

 are usually lacerate at the apex, the body too has 

 frequently a good deal of its hair rubbed off. It 

 will not be without use to know into what the 

 predominant colours fade : yellow will usually first 

 turn pale, and then cinereous ; red will turn 

 through tawny to yellow, and sometimes to cine- 

 reous ; white will turn to pale, and sometimes to 

 tawny, and black will now and then turn white. 

 But this is not all the difficulty with which the 

 describer of the Bomhinatrices has to struggle : 

 the males in general resemble the females suffici- 

 ently to be known as such, but there are several so 

 unlike them, as to be easily mistaken for different 

 species ; and I am by no means certain that I have 

 not, in more instances than one, described the sex- 

 es under different names : till all can be traced to 

 their nidi this is not easy to be avoided. In my 

 arrangement of the species of this section, I have 

 observed the following rules, which, for the most 

 part, were suggested by the evident affinities of 

 these insects. I begin with those whose general 

 hirsuties is pale yellow, while that of the thorax is 

 orange; after these follow such as have the same 

 coloured hair, but whose thorax has a black band(c?); 

 next I place such as are distinguished by the colour 



(rf) A. sylvarum, Lin. has a red anus, but its general habit 

 gives it a strong affinity with tliose that precede it. 



of 



