Ct'rri/oi/.'] nYDRciriiii.iiij:. 255 



a*. Elyti'a dark witli a wcll-ilcfined apical 

 yellowish patch extending upwards along 

 margins to base C. AQUATicrs, Mills. 



h*. Elytra yellowish -testacrous with a well- 

 defined large common dark spot aljout middle C. UNIPUNCTatds, L. 



c*. Elytra lighter or darker reddish brown 

 with margins of thorax broadly and obscurely 



reddish C. lateralis, Mamh. 



C. Length 1-2 mm. 



a. ]>:iteral margins of thorax nari-owly con- 

 tinued along base, for at all events some little 

 distance; elytra yellow-testaceous. 



a*. Size larger, striaj deeper C. QriSQriLiua, L. 



b*. Size smaller, stri-d? feebler C. kigiuckps. Marsh. 



b. Posterior margin of thorax not bordered. 



a*. Size smaller; elytra not acuminate at 

 apex, 

 af. Inner stria; of elytra confused and 



feeble towards b;ise; form shorter . . C. ptgm.?;u5, ///, 

 bf. Inner stria; of elytra very plain at 



base; form longer ' C. terminati.s, ilfarsZs. 



b*. Size larger ; elytra acuminate at a;ex . C. anali:;, Payk. 

 2. Punctuation of interstices of elytra indistinct or 

 absent. 



A. Stria; of elytra continued to apex. 



a. Elytia duller than thorax; second joint of 



m:ixillary palpi not or only slightly dilated . C. moUBUlS, Taylc. 



b. Elytra as shining as thorax ; second joint of 



maxillary palpi considerably dilated . . . . C. GRANaeius, Er. 



B. Striae of elytra not continued to apex . . . . C. mixuxl's, J/m/s. 



C. littoralis, Gyll. Oval, depre.ssed, black, sliiny, thickly punc- 

 tim;il ; clypeus emarginate at apex; thorax transverse with the sides 

 rounded ; elytra with punctured striae which are deeper towards apex, 

 interstices thickly punctured ; apex broadly testaceous ; legs pitchy or 

 reddish ; anterior tibiae excised externally before apex ; the colour is 

 somewhat variable, the thorax and elytra btjing sometimes margined with 

 nnl ; occasionally the whole insect is reddish, or the elytra are pale red 

 and the thorax darker ; the colour, however, depends iu great measure 

 on the maturity of the insect. L. 2-3^ mm. 



A maritime species ; found on the coast, often below high-water mark under decay- 

 ing sea-weed, rubbish, &c. ; common and widely distributed iu England and Scotland ; 

 Inland, near Belfast and lialdoyle, and probably eoninioii. 



C. depressus, Sleph. {(lorso-striafum, Thorns.). A'ery like the pre- 

 ceding, but (li.stingiiislied by having the anterior til)iiT entire, tlie clypeus 

 subtruncate or rounded at apex, and by the fact that the elytral striae 

 are evanescent towards apex ; the colour is somewhat more variable as a 

 rule, and the punctuation of the interstices of the elytra is rather more 

 obsolete, but these latter cliaracters are not to be depended upon ; the 

 average size is rather smaller. L. 2- ."') mm. 



Found under the same circumstances as the preceding, but much less common ; 

 Devonshire; Weymouth; Hayling Island; I.-le of Wight (Ityde, Ventnor, Ac); 



