Svronia.] CLAVICORNIA. 237 



rupted at the suture, a space near the suture remaining testaceous ; in 

 S. rjrisea these markings are just the same, but the hinder dark band is 

 not interrupted, and, as a rule, covers the whole sutural space ; in the 

 latter species the anterior tibiae are quite simple in both sexes ; in S. 

 punctatissima they are slightly curved in the male. L. 3-4 mm. 



Widely distributed and rather common throughout the London, Southern, and 

 Midland districts ; rarer further north ; not so often associated with Cossus as the 

 preceding; Netting Hill, in willows not infested by Cossus (Power); Stretford, 

 Manchester, under bark of old apple trees (Reston) ; common in and near Cossus 

 burrows in the above-mentioned districts ; .1 have beaten it from hawthorn blossom 

 near the banks of the Trent at Repton, and in Bretby Wood near the same place ; 

 Scotland, scarce, Solway, Forth, and Moray districts ; Ireland, near Dublin, and 

 probably widely distributed. 



AIMPUOTIS, Erichson. 



About half-a-dozen species are comprised in this genus, three of 

 which occur in Europe, and the others are found respectively in Syria, 

 North America, and Cayenne ; the genus may be at once distinguished, 

 apart from differences in the mouth organs, by the very broad and 

 smooth margins of the thorax and elytra, and the very greatly enlarged 

 first joint of the antennas, which, when viewed from above, gives the 

 forehead the appearance of being strongly lobed ; the second joint is 

 inserted beneath the lobe formed by the first, which slightly overlaps 

 it, and not at the end of the first joint, as is the case with Omosita and 

 other genera, which have the first joint thickened. 



A. margrinata, Er. Convex, with very broad and distinct margins 

 to thorax and elytra ; head and thorax ferruginous ; elytra dark, with 

 some lighter markings, and with five distinct raised longitudinal lines 

 on each ; margins of thorax and elytra of a uniform red colour ; punc- 

 tuation of thorax fine and close, of elytra stronger and more diffuse ; 

 legs rather stout, red. L. 4-5 mm. 



In chinks and crevices of beech and other trees near the runs of Formica fuli- 

 ginosa; rare; Birch Wood, Chobham, Reigate, Cootnbe Wood, Tilgate Forest, 

 Micklehani, Horsell, Maidstone ; apparently not found except in or near the London 

 district. 



OMOSITA, Erichson. 



This genus contains about half-a-dozen species from Europe, North 

 America, and Abyssinia ; all the three European species occur in Britain, 

 and may be distinguished as follows : 



I. Length 4i\ mm. ; thorax ferruginous ; elytra strongly mar- 

 gined 0. DEPEESSA, L. 



II. Length 2-3 mm. ; thorax dark, with margins somewhat 



lighter ; elytra very slightly margined, 

 i. Thorax strongly rounded and contracted in front ; elytra 



dark with scattered reddish-yellow markings O. COLON, L. 



