326 I December 



viewed from above it appears to have the thorax deeply foveate on 

 either side behind (much as in La Ferte's fourth division of the genus 

 Antliicus), and the transverse groove interrupted in the centre. T. 

 clavipes is no doubt congeneric with T. seydmcBnoides : in the latter 

 the mesosternal process is more broadly and more distinctly raised be- 

 tween the middle coxae than it is in T. clavipes, but this is not of much 

 importance. In some of the American species, and in T. clavipes and 

 T. scydmcenoides also, the intercoxal process of the abdomen is very 

 broad and almost or quite truncate in front. The ovate shape of the 

 elytra and absence of humeri is no doubt characteristic of the apterou^^ 

 condition of the body, but this cannot alone be regarded as of generic 

 importance, Formiconius containing both apterous and winged species. 



11, Caldervale Road, Clapham : 

 October, 1890. 



Note on. the genus Dischidiis, Kolbe. — In the Entomologisclie Nachrichten, xii, 

 p. 297 (1886), Kolbe has proposed the genus Dischidus for Tenehrio sinuatus, Yabr., 

 and its allies, he probably being unaware of the fact that C. O. Waterhouse had 

 ten years before, Ann. and Mag. Nat. Hist., ser. 4, xvii, pp. 288 and 289 (1876), 

 characterized the species in question under the generic name Taraxides ! — Id. : 

 November 8th, 1890. 



Bidessus unistriatus, Sturm, Sfc, in East Norfolk. — While staying at Waxham 

 on the Norfolk coast, about midway between Yarmouth and Cromer, in the latter 

 part of June and the beginning of July last, I devoted a good deal of time to the 

 investigation of the Coleopterous fauna of the vicinity. The sea coast itself, with 

 its monotonous shifting sandhills, from Winterton on the one side to Hazeboro' on 

 the other, proved to be almost barren as regards Coleoptera. But the "broads" 

 and " meres " inland, including those of Horsey, Somerton, and Hickling, were fairly 

 productive, especially in Dyticidce and GyrinidtB ; and as little else of interest was 

 to be met with, I chiefly confined mjself to the use of the water net. The publica- 

 tion of Mr. Edwards' useful paper on the British GyHnidce (Entom., xxiii, pp. 105 

 — 109), and two afternoons' collecting in company with that gentleman, induced me 

 to pay a good deal of attention to these somewhat neglected insects. Amongst the 

 DyticidcB, the most noteworthy species observed was Bidessus unistriatus, Sturm : 

 this insect occurred in abundance in various localities in the district, in the shallow 

 reaches of the broads, and sparingly in the ditches, always where the water was 

 partially stagnant. It seems strange that it should have remained a rarity for so 

 many years in this country, though the allied and extremely local B. minutixsinius, 

 Germ., was known to have a somewhat similar habit. Amongst the Oyrinidce, no 

 less tlian seven out of the ten British species of Oyrinus occurred more or less freely ; 

 and the " Broad " district of East Norfolk would appear to be by far the richest 

 locality for these insects in Britain. The only locality known to me at all approaching 



