Jensen-Haarup, New species of Coleoptera from West Argentina. 545 



2. Base of thorax in the middle almost angulately rounded 



backwards, extending over part of the scutellum. 



B. tunuyanense n. sp. 

 Basal margin of thorax straight or only feebly rounded. 3. 



3. Striae of elytra continued to or very near to apex . 5. 

 Elytra glabrous and shining ; dorsal striae rudimentary or 



wanting; only the sutural stria more or less distinct. 4. 



4. Elytra shiny , metallic black , with bright pale yellow drop- 



shaped marking behind middle near side margin. 



B. pallidiguttula n. sp. 

 Elytra brownish yellow, with dark markings nearly as in the 

 palearctic B. artimlatum .... B. Lonae n. sp. 



5. Dorsal striae of elytra continue almost equally strong to apex. 



Sides of thorax very strongly rounded 6. 



Dorsal striae disappearing at greater or less distance from 

 apex. Sides of thorax less strongly rounded . .7. 



6. Thorax almost circular , broadest across the middle , con- 



siderably broader than head with eyes. 



B. Engelharti n. sp. 

 Thorax cordiform , much constricted at base , broadest in 

 front of the middle, only slightly broader than head with 

 eyes B. Peterseni n. sp. 



7. Head and thorax darker or paler brownish red, without 



metallic shine B. mendocinum n. sp. 



Head and thorax pitchy brown , with greenish or bluish 



metallic shine B. proportionale n. sp. 



Head greenish or bluish black , with metallic shine ; thorax 



brickred . B. M-signatum n. sp. 



8. Elytra entirely metallic black 9. 



Elytra black (with slight metallic shine), speckled or spotted 



with yellow nearly as in the palearctic B. varium and 



B. adustum lö- 



Elytra pale yellow, with dark shadows. (Legs and antennae 

 Short, robust) B. cillenoides n. sp. 



9. Smaller species (S^/o mm). Anterior angles of thorax rounded, 



not prominent; posterior angles considerably more than 90 , 

 less Sharp. Sides of thorax rather rounded. 



B. duhium cf n. sp. 

 Larger (4^2 mm). Anterior angles of thorax rather pro- 

 minent; posterior angles about 90^ terminating in a 

 little Sharp tooth. Sides of thorax less rounded. 



B. ll'jei $ n. sp 



Sl). 



Deutsche Entomol. Zeitschrift 1910. Heft V. 3Ö 



