130 [J«ii«' 



however, convinced that all the specimens I refer to it are really 

 one species. The ap»penda!^e at the extremity of the aedeagus is of 

 very delicate form, and shrivels somewhat in drying. A variety — 

 quite mature — with pale elytra occurs. The type is of the large, dark, 

 veiy flat form. 



2. — Gabkius pennatus, sjj. n. 



Angustus, niger, antonnarum basi, 2Mlpis x>eclihusque testaceis ; capitc angusto ; 

 thorace angusto antrorsiim suhangiistato ; clytris thorace paulo longioribus, sat 

 fortiter punctatis. Long., 4| mm. 



Mas. : ahdomine segmento ultimo ventrali excisione parva, sed profunda, a 

 memhrana pcllucido, fere omnino impleta ; xdeago ad apicem apjpendicula rohusta, 

 abrupta, acuminata, quasi p)entagonali. 



Hah. : Anglia et Scotia ; hand vulgaris. 



This is much narrower than G. nigritul'us, and is thoroughly well 

 characterised by the aedeagus, which does not resemble that of any 

 other species. 



8. — Gabrius velox, sp. n. 



AngUjStus, niger, antennarum basi palpisque testaceis ; capite angusto ; 

 tJiorace angusto antrorsum subangustato ; etytris thorace paulo longioribus, 

 fortiter punctatis. Long., 4^ mm. 



Mas. : abdomine segmento ultimo ventrali excisione angusta, profunda, a 

 mcmbra^ia pellucida fere omnino impleta; xdeago sat elongato, o.pice obtuso, 

 appcndicula apicali reflexa, male delimitata, in partem anteriorem corporis 

 mdeagi quasi perdita. 



Hah.: Anglia ; ad flumen Lymington dictimi cujus in ripas 

 velocissime currit. 



Extremely similar externally to G. pennaius, but with a totally 

 different sedeagus. This organ in the present species naturally pro- 

 jects between the two terminal styles, so that the form of its apex can 

 be seen without dissection. G. nigrihdus is twice as broad as G. velox ; 

 the sedeagus in these two species approximates considerably ; but there 

 are well marked distinctions and the structure exhibited by that of 

 G. nigritulus explains that of G. velox, which taken alone would be 

 obscure. 



4. — Gabrius keysianus, sp. n. 



Sat angustus, niger, pjcdibus piiceis, iarsis rufescentibus ; capite oblongo ; 

 prothoracc antrorsum parum angustato ; clytris prothorace longioribus, sat 

 profunde punctatis. Long., 5^ mm. 



Mas. : abdomine segmento ultimo ventrali excisione lata, a, membrana pellu- 

 cida parte majore impleta ; sedeago apice pellucido ct elongato, apice summo 

 suibaciwiinato sed vcre minutissime bidcntato. 



