CHAPTER OF VARIETIES. 



he rejects the term Cephalotes on account of there being a genus of 

 Mammalia of that name ; Cheetophora, because of its also being a genus 

 of Fungi ; Dascillus, Phycis, and Zygaena, because of their having 

 been bestowed by the ancients upon certain species of fish ; Nanodes, 

 Gryphus, and Lagopus, on account of their being the names of orni- 

 thological genera ; Liparis, because of its being a genus in Ichthyology ; 

 Cerastis, because of its being a genus in Erpetology ; Lissa, because of 

 its being a genus in Crustacea ; and lastly, Scoparia, because of its 

 being a genus in Botany. Proceeding upon equally justifiable grounds 

 for the alteration, as those presented by the compiler of the above work, 

 Professor Burnett, in his excellent " Outlines of Botany," has intro- 

 duced " Term-affines" as a preferable botanical name, to Term-ites, on 

 account of that word being already bestowed upon a genus of tropical 

 insects, erroneously called white ants. In conclusion, I hope that this 

 paper may not be unproductive of the object of its writer, as above 

 stated. SOUTARIUS. 



London, August, 1833. 



ON THE MAY-FLY LARVA BEING THE CADIS-WORM. Your corre- 

 spondent " D. M." of Devizes, states that it is a popular notion that 

 the cadis is the larva of the may-fly (Ephemera). I have never heard 

 any person speak of the may-fly otherwise than as being the grub of the 

 cadis-fly ; and in books upon angling, besides those upon natural 

 history, it is spoken of as such. Had " D. M." (who I infer belongs 

 to the angling fraternity), read Sir Humphry Davy's " Salmonia," he 

 would have been gratified by an account of the proceedings and trans- 

 formation of the cadis to a fly. He is decidedly incorrect in stating 

 that a cadis- worm is never found " in a greater state of forwardness 

 than another, excepting as far as regards its size." Now it so happens 

 that the larva within its moveable case is by and by transformed to a 

 pupa *, in which state it bears a greater resemblance than it did pre- 

 viously to its perfect state as a fly. The cadis-fly (Phryganea) may 

 be found during the spring months, resting upon palings near water, 

 and to a common observer has somewhat of a resemblance to a moth. 

 It is by no means a new piece of information to entomologists to be 

 told that the may-fly, instead of coming from a cadis- worm, comes 

 from a grub answering to the description your correspondent has given 

 of it. SOLITARIUS. 



London, August, 1833. 



* Figured in " Insect Transformations," p. 321. 



