1912.] 209 



Small specimens of 0. rupicoloides are very similar to 0. parallelns, 

 but I have never seen that species with the coloration of this. 0. 

 paraUelus, moreover, also has the thorax more evenly punctured through- 

 out. The sedeagus of 0. rupicoloides is most lite that of 0. rupicola, 

 but the apical portion is much more slender, and the raised margin at 

 the tip less definite. 



0. rupicoloides is probably not a great rarity in Southern 

 England. Commander Walker possesses a nice series from the Med- 

 way district (Chatham and the Isle of Sheppey), and he has also met 

 with it at Portland. Mr. Pool has found it at Bembridge in the Isle 

 of Wight. Mr. Champion has an example from Gruildford, and I 

 have one irom Mickleham. Most of my own specimens were procui-ed 

 from Brewer many years ago and probably came from Chatham. The 

 Crotch collection at Cambridge possessed a small series without 

 locality, and spoiled by Mr. Crotch having taken them off their cards 

 and pinned them with black pins. The same collection also has a 

 specimen from T. V. Wollaston marked " puncticollis" and " Withing- 

 ton," and which may be from either Herefordshire or Wiltshire. 



The Bembridge specimens seem to be a slender race resembling 

 rectauguhis a good deal, though not really difficult to distinguish. 



6. — O. CHAMPIONI, sp. 11. Ferritglneus, cainte thoraceque piceo-femi- 

 gineis, elytris nigricantihus ; thorace transversa, basin versus angustato, 

 lateribus vix sinuatis, angulis posterioribus obtusis, basi tantum prope 

 angulos marginata, puree punctato ; elytrrs profunde striatis, crebre sat 

 fortiter punctatis. Long. 6 mm. 



This species is known to me only by four specimens, all males. 

 On account of the small size etc. 0. championi resembles 0. paraUelus, 

 but it is closely allied to rupicoloides from which it differs by having 

 the thorax slightly diiferent in shape, more scantily punctured, rather 

 less sinuate at the sides, and the hind-angles slightly more sharply 

 marked, though really more obtuse. The elytra are a little more 

 deeply striated. The sedeagus is shorter and thicker, with a shorter 

 and stouter apical portion. In addition to these characters I find that 

 the wing is shorter, more blunt at the tip, with the nervures on the 

 apical portion more obsolete than in any other species (except 

 0. az'uretis, in which the wings are rudimentary). Though very closely 

 allied to rupicoloides I believe this will prove to be a distinct species. 



I found three specimens near Guildford on May 3rd, 1895, when 

 collecting with Mr. Champion ; and there is an example in his collec- 

 tion, also from Guildford, and perhaps found at the same time. He 



