246 Mr. G. Lewis on 



recognized by tlie cliaractovistic formation of the terminal 

 portion of the pleon ; it differs from C. d<tmno7iiensis, Stebbnig, 

 in liaving a flat expansion to the bases of the third pereiopod 

 and in having the apex of the inner plates of the maxilhpcds 

 truncate; in the lattor point and in some others it agrees 

 with the new genus Faracyproidea, Stebbing, but it appears 

 to difler from this genus in the form and size of the telson. 



EXPLANATION OF PLATE V. 



Fiq. 1 . Ci/pioifJia nfnknish. X 24. 



Fi(/. 1 (I. ><. SuiHM-ior antenna. 



Fig. 1 «• i- Inferior antenna. 



Fi</. \ l/n- L Fir5it gnathopod. 



Fiij. 1 '/"• 2. Second gnathopod. 



/•'»/. 1 prp. 1-5. First to fiftli pereiopods. 



Fuh 1 ur. 3 Jv: T. I'hird uropod and telson, side view. 



(All the details liiglily magnified.) 



XXXIII. — On neio Species of Histeridpe and Notices of 

 others. By G. LEWIS, F.L.S. 



[Concluded from p. 234.] 



Hister Iccvimargo, sp. n. 



Ovalip. parura convexus, niger, nitidus ; fronte stria Integra, supra 

 ociiios angulata; thorace stria interna basi vix abbreviata; elytris 

 striis 1-4 integris, 5 et suturali apicalibiis, suturali longiore ; 

 propvgidio postice dense punctate, basi margiiieque lateral! late 

 la?vibus ; prosterno bistriato ; mesosterno leviter cmarginato, 

 stria marginali Integra ; tibiis anticis 3-dcntatis. 



L. 4i mill. 



Oval, rather convex, black and shining ; the liead, frontal 

 stria well-marked, sinuous behind tlie mandibles, angulate 

 above the eyes; the thorax, marginal stria very fine, con- 

 spicuous at the anterior angles only, ceasing behind the eyes, 

 lateral stria almost complete, but a little sliortened before the 

 base, feebly bisinuous behind the neck ; the elytra, striaj 1-4 

 complete, 5 apical, sutural dimidiate and apically turning 

 slightly away from the suture, the humeral striae are absent 

 excei)t a very fine oblique stria joined to the first dorsal stria 

 at its base ; the projjygidium is densely punctured trans- 

 versely behind, the punctures leave a broad smooth margin 

 at the base and sides, the sides being clearly elevated ; the 



