146 



Sp. I. Natator. — The type of the Linnean Gyri- 

 nus. For the anatomy of these singular insects, 

 the reader should consult Dufour's Memoire in the 

 Annales Scien. Natur. 1824. A reference also to 

 Mr. Westwood's new publication, the Modern 

 Classification of Insects, part 2. p. 105, will afford 

 a list of authors who have written on this group, 

 and to them may be added the Fauna Boreali 

 Americana, by Mr. Kirby, wherein some new spe- 

 cies will be found described. 



Sp. 2. Bicolor. — The species named by Fabricius 

 is certainly not the same as G. Bicolor Olivier, as 

 the latter is a variety of Gyr. Minutus, while 

 Elongatus of Marsham is a synonym of the former. 



Sp. 6. Premorsus. — Probably a Dineutus of Mac- 

 Leay. The locality given in the Eleutheratorum is 

 Sierra Leone. Is it not singular, that under the 

 above name, Gyrinus Indus, should be found quoted 

 as a synonym ? (Vid. Ent. Syst. Supp. 65. 5.) 

 There is evidently some mistake respecting the 

 country. The species of this genus belong to sou- 

 thern and tropical countries, never being found in 

 northern climes as far as is known at present. 



Sp. 10. Minutus. — Still a Gyrinus. Mr. Kirby, 

 in his Fauna Boreali Americana, tells us that a 

 single specimen was taken in the northern expedi- 



