5.0 Mr. F. Pickar.l-Cambrldge— A Revision 



tJTOPlELLUM, Strand, Arcliiv Mathera. Natur. B. xxiv. NR. 2 

 (1901). 



A single species— ^r?'^one mirah His, Ij. Koch, 18 < 9, is 

 cited on p. 31 as the type of this genus. 



Type, Utopiellum mirahile (L. Koch), 1879. 



Cektromeria, Strand, Archiv Mathem. Natur. B. xxiv. 



NR. 2, p. 33 (1901). 



A single species— AV?e/ie licolor, Blackw.— was referred 



to this genus. t-. i j 



Type, Centromena bicolor (Blacku-.), 18o3.— Lngland. 



PSEUDOGONATIUM, Strand, Archiv Mathem. Katur. B. xxiv. 

 NR. 2, p. 37 (1901). 

 A single species was referred to this genus.^ 

 Type, Pseudogoyiatium fuscomarginatam, Strand, 1901. 



"Norway. 



Note. 



In the cases dealt with above there occur several instances 

 of definite and doubtful substitution of new names for those 

 preoccupied, the settlement of their types being in some cases 

 further complicated by the addition of new species not origi- 

 nally included in the genus for which the new name is 

 definitely or doubtfully substituted. , -, . n j 



It will, perhaps, be useful to explain the methods followed 

 in such cases : — 



A A case of a definite and distinctly stated substitution (e. g., 

 Ctrcidia, Thor., for Cerceis, Menge), or where there is 

 no doubt, since the original name is quoted as a synonym 

 under the new one. Then in cases wnere 

 (a) no species at all are quoted under the new name— then 

 the species which was the type of the original genus 

 is regarded also as the type under the new name sub- 

 stituted; . 

 (I) when one or more of the original species are quoted, 

 then the type is to be looked for amongst these only 

 (e, g., Cercidia, Thorell) ; 

 (c) when new species are quoted, as well as one or more 

 old ones, then these, too, are taken into consideration— 



