144 ORION. 



NOTE XXIX. 

 ON THE LONGICORN GENUS ORION, GUÉR. 



BY 



C. RITSEMA Cz. 



In the „Genera des Coléoptères" (VIII, p. 300) Laeor- 

 daire, in accordance with Guerin's views, ascribes to the 

 female of Orion patagonus Gruér. a prothorax which is more 

 strongly rugose than in the male and the callosities of 

 which are less numerous and but little conspicuous. 



Now the Leyden Museum possesses two specimens of 

 0. patagonus (one from Magellan: Patagonia, the other 

 from Cordoba: Argentinia) which, no doubt, are male and 

 female , but these two have the thorax quite similarly 

 sculptured. The male , however , is smaller and of a some- 

 what brighter colour; it has the antennae somewhat longer, 

 and the apical half of the elytra subshining in consequence 

 of its being rather vaguely sculptured ; in the female , 

 however, the apical half of the elytra is opaque coriaceous. 



Moreover the Leyden Museum has a third specimen of 

 this genus (from Santa Lucia : Uruguay) which almost ex- 

 actly corresponds with the figure given in the „Atlas" 

 belonging to Lacordaire's „Genera" (pi. 86, fig. 1) under 

 the name of Orion patagonus. In this specimen the thorax 

 is very strongly rugose, its callosities are but little con- 

 spicuous, and its lateral spines very slender, whilst the 

 elytra are more coarsely rugose and have the costae slightly 

 more distinct. I suppose this to be the form considered 

 by Guérin and Lacordaire as the female of patagonus, but 

 as, in my opinion, it is specifically distinct from that 

 species I propose to call our Uruguay insect Orion La- 

 cordairei. 



Orion brunneus Guér. most probably will prove to be 

 founded on a male specimen of patagonus Guér. 



Notes from the Leyden Museum , "Vol. XI. 



