CANAKTAN COLEOPTERA. 19 



29. Tarus discoideus. 



Cyniindis discoidea, Dej., Icoti. i. 78. t. 8. f. 5 (1829). 



, Id., Spec. Gen. des Col. v. 307 (1831). 



discordea, Bridle, in Wchh et Berth. (Col.) 55 (1838). 



, Hart., Geolog. Verhdltn. Lanz. und Fuert. 140 et 141. 



Habitat in Lanzarota ct Fuerteventura, sub lapidibus, prsesertim 

 in arenosis, tempore hiberno et vernali vulgaris. 



I refer without hesitation the present superb Tarus to Dejean's 

 discoideus (described from a single specimen, of uncertain hahitat, 

 which he obtained from the collection of LatreUle), because it is the 

 opinion of my friend Dr. Schaum that such should certainly be the 

 case, and because Dejean's diagnosis seems to tally sufficiently well 

 with the long array of examples now before me. Almost the only 

 particular, indeed, in which it does not quite accord with the Cana- 

 rian insect is, that it speaks of the black patch at the base of the 

 elytra as "presque triangulaire " ; whereas it is invariably (in 48 

 specimens which I have just examined) transverse-quadrate. 



The T. discoideus abounds, beneath stones, during the winter and 

 spring, in Lanzarote and Fuerteventura, — where it was taken by Mr. 

 Gray and myself in January 1858 ; and subsequently, by myself, 

 during February, March and April of the following year : it has been 

 likewise recorded in both of those islands by M. Hartung. Hitherto I 

 have not observed it in any other portion of the Group ; nevertheless 

 a pail' has lately been communicated by the Barao do Castello de Paiva, 

 professedly captured in Teneriffe ; but as I feel that there may be 

 some mistake about the habitat, I have thought it safer not to enter 

 it as a Teneriffan species. It is far from unlikely, however, that it 

 will be found to occur in the sandy region between Las Palm as and 

 the Isleta, of Grand Canary. 



30. Tarus suturalis. 



Cymindis suturalis, Dej., Spec. Gen. des Col. i. 206 (1825). 

 Tarus suttu-alis, Woll., Ins. Mad. 3 (1854). 



, Id., Cat. Mad. Col. 2 (1857). 



Cymindis suturalis, Hart., Geolog. Verhdltn. Lanz. uml Fuert. 140. 



Hahitat in Lanzarota, Fuerteventura et Canaria, sub lapidibus in 

 arenosis una cum specie prsecedente degens. 



The T. suturalis (which occurs in three out of the five Madeiran 

 islands, and which has lately been communicated by the Barao do 

 CasteUo de Paiva even from the rocks of the Salvages) occurs, beneath 

 stones (particularly in low sandy spots), in company with the last 

 species, throughout Lanzarote and Fuerteventura ; and I have like- 



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