ADDENDA. 



CARABID^. 



Ophonus, Steph. In the Ent. Mo. Mag. for August, September, 

 and October 1912 (pp. 181-185, 207-210, and 229-232), Dr. Sharp 

 discusses the smaller, brown or blackish species of this genus, which 

 have always been a source of great difficulty to collectors, both in 

 Britain and on the Continent. He points out that while the OBdeagus 

 does not present remarkably difterent characters, the lateral lobes being 

 similar in all the species, yet the median lobe or body of the organ 

 presents characters which, though slight, are extremely valuable, so 

 that by their aid he has been enabled to discriminate the species in a 

 satisfactory manner; and he finds that the group includes nine British 

 species, or, if we include the brown variety of 0. az^creus, ten species. 

 This means the addition of four species to our catalogues. They are 

 1, hrevicoUis, Dej. ; 2, mfiharhis, F. ; 3, cordahts, Duft. ; 4, rnjncola, 

 Sturm,; 5, riqncoloides, sp. n. ; G, chavipioni, sp. n. ; 7, ^J«^•rtZ?eZ^(s, 

 Dej. (?) ; S, rectangulus, Thoms ; 9, ^luncticollis, Payk. ; 10, azureus, 

 F. v., si7nilisT)ej. 



In brevicoUis, cordatus, and rufiharhis the sedeagus terminates in a 

 blunt point ; in the other species it terminates by a raised margin, 

 which, when very strongly expressed, projects a little on each side in 

 the form of a sharp angle. Transitions occur, but in addition to this 

 the organ presents important diflerences in length, calibre, curvature, 

 torsion, the thickness of the apical portion, and the extension of the 

 median orifice towards the tip. These characters are very constant, 

 and are found to go with the various external characters by which the 

 species may be discriminated without reference to the a^leagus, 

 although the differences cannot well be tabulated. 



O. brevicoUis, Dej. (Sp. iv., 218). This species may be 

 distinguished by its short broad thorax with sharply marked rect- 

 angular hind angles, by the punctuation of the thorax being very 

 scanty on the disc, and by the fact that the punctuation of the elytra 

 tends to become diminished, and though somewhat coarse is frequently 

 sub-obsolete. The colour is generally fusco-piceous, with the head 

 and thorax often lighter and almost rufescent in some cases. The 

 length is variable (6-8 mm.). The fedeagus has a blunt short tip, 

 the apex being minutely curved, but without an actual raised margin. 



This is apparently our most abundant species, and is widely 



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