324 Mr* Clark's Obfervations on the Genus Ocftrus. 



In the Fauna Etrufca of Rofs, the Bovis is defcribed " alls macu- 

 lathy' which muft be the Equi\ and a fpecies under the name of 

 Equi is defcribed " alts immaadatis," The fynonyma are alfo mixed 

 in a very extraordinary manner ; torn, i, p. 268. In a fubfequent 

 volume he has propofed to reconcile thefe very various defcriptions 

 by referring them to a fexnal difference. 



In the Entomologia of Villers, the Linnsean account and refe- 

 rences are copied, torn. iii. p. 345 ; and at the conclufion is very pro- 

 perly dated the perplexity attending the contradictory defcriptions 

 of thefe infects. 



The references to Sultzer and Frifch, as their figures afford no 

 idea of the infect intended, I have omitted. 



Modeer, in the Swedifli language, Act. Stockholm. 1786, p. 125, 

 ha£ given Equl for hvcmorrhoidalis^ and hamorrhoidalis for Bovis. 



Geoffroy, Hijloire des Inject es, in the three fpecies defcribed by 

 him, has nearly followed the arrangement given by Linnaeus, torn. ii. 



P- 445- 



Fabricius, in his laft work, the Syjlema Eniomologica Emendata, has 



obfeured this genus in a way that it will not be eafy to unravel. 

 He has given an Oejlrus Bruis, with a defcription nearly correfpond- 

 ing to the true one, " alls immaculatis" Sec. but immediately refers 

 to the Linmean Bovis " alis macula t is ^ and continues the Linnxan 

 references. Under the title of Equi is defcribed the CE, veterinus*, 

 under which the h amor r hoi dalis is introduced as a variety /2 ! So that 

 a defcription of the true CE. Equi, the mofl frequent and ifrongly 

 marked of this genus, is altogether omitted, as a diftincl fpecies ; 

 at the fame time the variety of it $ of my account and of the Lin- 

 nsean Fauna is prefented as a diftincT; fpecies, under the extraordinary 

 title of CE. Fituli-, and beneath it is a reference to the true Equi in 

 Geoffroy. The CE. Pecorum of this author is moil probably a dark-co- 

 loured variety of the CE. veferinus, or it may be altogether a new fpecies. 



The 



