3-4 



Mr. Clark' J Obfervatlons on the Genus Ocjlrus. 



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

 /jtis," which muft be the Equi; and a fpecies under the name of 

 Equi is defcribed " alts imntacidatis." Ttie fynonyma are alfo mixed 

 in a very extraordinary manner j torn. i. p. 268. In a lubfcquent 

 volume he has propofed to reconcile thefe veiy various defcriptions 

 by referring them to a fexual difference. 



In the Entowologia of Villers, the Linnnsan account and refe- 

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

 perly dated the perplexity attending the contradidtory defcriptions 

 of thefe infers. 



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

 idea of the infect intended, I have omitted. 



Modeer, in the Swcdilli language, Aci. Stockholm. 1786, p. 125, 

 lias given Equi for hamorrhoidalis, and hamorrhoidalis for Bovis. 



GeofFroy, WJloire des InfeSies, in the three fpecies defcribed by 

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



P- 445- 



Fabricius, in his laft work, the Syjlema Entomologica Emendatci, has 



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

 He has given an Oeflrus Brjis, with a defcri[)tion nearly correfpond- 

 ing to the true one, " a/is immaculatis" &c- but immediately refers 

 to the Linncean Bovis " alis maculatis^' and continues the Linnaean 

 references. Under the title of Equi Is defcribed the CE. veierintis^ 

 under which the hamorrhoidalis is introduced as a variety /2 ! So that 

 a defcription of the true OE. Equi, the mofl frequent and ftrongly 

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

 at the fcime time the variety of it /3 of my account and of the Lin- 

 nsean Fauna is prefented as a diftindl fpecies, under the extraordinary 

 title of <^. Vituli; and beneath it is a reference to the true Equi in 

 GeofFroy. The CE. Pecorum of this author is mofl probably a dark-co- 

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



The 



