1913.] 155 



and punctiu-ed ; elytra quadrate, about one-third longer than thorax ; hind body- 

 diffusely punctured, 4tli and 5th free segments almost inipunctate ; <? with 

 ventral plate of 5th segment projecting some distance beyond the dorsal plate. 

 L. 2.2-2.5 mm. 



In colour, punctuation and general appeai'ance, A. britteni much 

 resembles A. debilis, Er., but is considerably smaller. The chief 

 external difference lies in the shape of the thorax, which is not nearly 

 so much contracted behind and has the sides very slightly and evenly 

 rounded, instead of being almost sinuate in the middle as in A. dehilis ; 

 the hind angles also are much less marked and more rounded. The 

 aedeagus is of the same peculiar general form in the two species, the 

 apical portion of < he central lobe being acutely bent back on itself ; the 

 differences in this organ in the two species can be seen in the figures 

 below. The same remarks with regard to the thorax apply to 

 A. magniceps, Sahib., but in this species the antennae have the penulti- 

 mate joints distinctly less transverse, and the sedeagus is entirely 

 different. 



A. hritteni also somewhat closely resembles A. deforniis, Kr., but 

 the antennae are much less thickened towards the apex, the colour is 

 darker, the form is slightly narrower, the thorax is less strongly con- 

 tracted behind, and the punctuation of the hind body slightly finer and 

 more diffuse. From A. scoti^'a, Elliman, to which it is also allied, it is 

 distinguished by its much darker colour, more slender antennse and 

 longer elytra. 



Mr. Britten sent me four specimens (including two dissected males) 

 of this species which he had taken in flood rubbish at Langwathly, Cum- 

 berland, on May 5th, 1911, stating that they had been named A. dehilis 

 by two authorities, but that he doubted this identification. From the 

 above description it will be seen that he was certainly right in his 

 surmise, and as there does not appear to be any other species in the 

 European catalogue which it can possibly be, I have much pleasure in 

 naming it after its discoverer. 



Trogophlceus hemebintjs, sp. nov. 



Somewhat dull, black, elytra pitchy, legs brown, knees and tarsi lighter ; 

 head scarcely narrower than elytra, eyes small, occupying slightly less than half 

 the side of head, temples not swollen behind eyes j antennse rather short, dis- 

 tinctly thickened towards apex, 3rd joint much shorter than 2nd, 4th to 10th 

 strongly transverse ; thorax scarcely narrower tlian elytra, slightlj' transverse, 

 very finely and closely pvmctured and extremely finely pubescent, strongly 

 narrowed behind, with a more or less distinct depression on disc ; elytra about 



