THE CANADIAN ENTOMOLOGIST. 305 



Tegrodera LeConte, 185 1, type species erosa LeConte, 1851. 



Tetraotiyx Latreille, 1833, type species ^r/^v/a^rz/Z^/z/'j' Latreille, 1833. 



Tmesidera Westwood, 1841, type s\^ec\Q?, rufipefifiis West wood, 1841. 



Triiodoiis E. Duges, 1889, ^yP^ species cordillercB Chevrolat, 1843 

 { — Icevis Leach, 1815), 1829. 



Zonitoides Fairmaire, 1883, type species megalops Fairmaire, 1883. 



This name is a homonym of Z^/z/Z^/rt^ffi Lehm., 1862, a valid genus 

 of MoUusca, and therefore must be changed. I propose the following in 

 its stead: 



Zonitopsis Wellm., 18 10, nom. nov. 



The only Linnsean genus may be fixed according to the Linnsean 

 maxim (Rule 8a supra), as follows : 



Mehe Linne, 1758, type species majalis Linne, 1758. This is 

 fortunate, as the only other Linnaean species of true Melo'e was subse- 

 quently used by Leach as the type of his genus Froscarabcp.us. The 

 winged insects listed by Linne' under the 1758 description of the genus 

 Meloe have also, with one exotic exception ( Mylabris) cichoni, since been 

 used as types of the genera Lytta, Alosinnis, Lydiis, Cerocoma and 

 Mylabris. Consequently, according to Stiles and Hassall's interpretation 

 of the Liternational code (page 58/ cf., also Rules 8a and 8b suprd),\\vtxQ 

 is happily no doubt whatever regarding the type species of the genus 

 Meloc Linne, 1758. 



The remaining genera may have their types chosen or tentatively 

 indicated mostly under rules 8b, 8c and 8d (supra). Where I prefix a 

 mark of interrogation the citation should be interpreted as only meaning 

 that the species named is, according to my present knowledge, probably 

 the one which should be taken as type. Thus, such genera remain for 

 any author to select their types subsequently. I quote in this connection 

 from Stiles and Hassall,^ who say under similar circumstances : " The 

 action on these cases in the present paper is not to be interpreted as 

 designation of type, but simply as an indication of the species which, other 

 things being equal, it seems best (so far as data are accessible at the 

 present moment) to select." The few genera not discussed in this paper 

 will be made the subject of a subsequent note. 



4. " Any species of a genus which has been selected to serve as type for a 

 later g-enus is excluded from consideration in selecting the type of the earlier 

 genus." 



5. Op. cit., p. II. 



