On Aquatic Carnivorous Coleoptera or Dytiscide. 749 
APPENDIX 
OF 
DESCRIPTIONS NOT IDENTIFIED WITH SPECIES KNOWN TO THE AUTHOR. 
In this appendix I have collected together all such descriptions of species of 
Dytiscidee as I have been unable to indentify certainly with any species known to 
me. Some of these descriptions can never be surely recognised except by the aid 
of authenticated specimens. A certain number are moreover probably identical 
with species described by other authors under different names ; where such indentifi- 
cation is probable but not certain I have not felt justified in assigning the names to 
the list of synonyms, and the descriptions are consequently here reprinted. Most 
of the descriptions are given in full, but in some cases only the diagnoses are 
reproduced. Where I could make any guess of importance as to the position and 
characters of a species I have appended a brief suggestion after the description. 
For convenience of reference these descriptions are numbered consecutively, the 
numbers being a continuation of those used in my own preceding species-descrip- 
tions, in order to avoid repetition of numbers and consequent confusion: thus they 
commence with No. 1172. 
1172. Acilius cinctatus, Aubé, spec. p. 151. Mexico. © 
“Ovalis vix ellipticus, convexiusculus, supra niger, infra nigro-piceus ; thorace nigro, ad latera luteo ; 
elytris nigris, vitta longitudinali postice abbreviata ad marginem punctisque minimis ad apicem luteo- 
notatis. Long. 94, larg. 53 mill.” 
[Followed by a description. ] 
“Je n’ai vu qu’un seul individu male de cette espéce ; il appartient 4 M. Gory, qui l’a recu de M. Klug 
comme venant du Mexique. ” 
This is placed by Aubé next to Acilius margineguttatus (No. 1070), to which it is apparently 
similar.—D. 8. 
1173. Acilius levisulcatus, Motch., Bull. Mosc. 1845, I. p. 30. Crimea. 
“ Acilius levisulcatus m. de la Crimée a les sillons sur les élytres lisses comme 1l’Ac. semisulcatus, De}. 
de Sitka, mais il est plus grand.” 
I do not think this can be accepted as a description ; I anticipate moreover that it is probably only 
Dytiscus sulcatus (No. 1052).—D.8. 
1174. Acilius laporti, Aubé, spec. p. 139. Brazil, 
‘‘ Oblongo-ovalis, convexiusculus, supra nigro-cinereus, infra ferrugineo-testaceus ; thorace ad latera et 
5 D2 
