210 Mr. T. V. Wollaston on certain Coleoptera 



3, HeteronychriS arator, Fab. 



Scarabcsus arator, Fab., Ent. Syst. i. 33 (1792). 

 Geotrupes arator, id., Syst. Eleu. i. 21 (1801). 

 Heteronychus arator, Burm., Handb. der Entom. v. 94. 



A single specimen of this Heteronychxis, taken by Mr. Bewicke at 

 St. Helena, agrees precisely (so far as I can detect) with numerous 

 examples of the same species which he captured at the Cape of Good 

 Hope, from which locality it was originally described by Fabricius 

 in 1792. It may possibly be identical with the H. Sanctce-Helenm 

 of Hombron and Jacquinot, characterized in the Zoological portion 

 of Dumont d'XJrville's ' Voyage au Pole Sud sur les Corvettes I'Astro- 

 labe et la Zelee ' (p. 105. pi. 7. f. 6) ; but if such should be the case, 

 the latter cannot be more than a variety (if indeed that) of the South 

 African arator ; and I may add, that my friend Dr. Schaum of Berlin, 

 to whom I lately transmitted the St. Helena specimen for comparison, 

 and who has paid great attention to this department of the LameUi- 

 corns, at once identified it with the Fabrician species. 



Fam. Curculionidae. 



Genus Microxylobius. 



Chevrolat, Trans. Ent. Soc. Lond. (1st series) i. 98 (1836). 



Having given a full diagnosis of this curious genus in my late 

 enumeration of " the Atlantic Cossonirhs," published in the * Trans- 

 actions of the Entomological Society of London,' accompanied with 

 lengthened observations on its structure and affinities, I will not 

 repeat any of them in the present paper. The five exponents re- 

 corded below (and which were there characterized) appear to be 

 congeneric with the minute Curculio, from St. Helena, described by 

 M. Chevrolat under the title of Micro.vylohius Westwoodii ; and, from 

 the great diversity of their outward contour, it would seem far from 

 improbable that many allied forms yet remain to be detected, and 

 that, like the Caulotrupides in Madeira, they will be found to be 

 an extensive insular assemblage. For all critical and diagnostic 

 remarks I must refer to the above-mentioned memoir. 



4. Microxylohius lacertos^ts, WoU. 

 Mtcrorylobius lacertosus, WoU., Trans. Ent. Soc. Lond. (1861). 



5. Microxylohius hmfugus, Woll. 

 Microxylohius lucifugiis, Woll., Trans. Eut. Soc. Lond. (1861). 



