genera and species of Languriida. 321 



antennis nigris, clava baud distincta 5-articulata ; linese coxales 

 elongatae, fortissimEe. L. 8 mm. 



Head and prothorax black, tbe former obsoletely puuctm-ed, tbe 

 latter convex, witb sides moderately rounded and sligbtly sinuate 

 before base, plainly but diffusely punctured ; margins strong, 

 somewhat reflexed, base depressed, and with a short stria on each 

 side ; elytra cyaneous or slightly violaceous, with shoulders well 

 marked, gradually narrowed to apex; apices truncate; rows of 

 punctures moderately strong ; under side and legs black or dark 

 cyaneous ; antennae with rather indistinct five-jointed club ; coxal 

 lines very strong ; male with prothorax rather wider in fi:ont than 

 female. 



From L. Giloloce, Crotch, L. ruflpes, Crotch, and L. 

 atrocyanea, Har., this species appears to be well dis- 

 tinguished by its punctured prothorax and five-jointed 

 club of antennge. It seems, however, most probable 

 that the three species here mentioned are all varieties of 

 one species which is variable in size. Crotch [l. c, 

 p. 386) speaks of L. rufipes as very near to, and probably 

 a variety of, L. Giloloce, and Von Harold seems some- 

 what doubtful regarding L. atrocyanea. L. nigrocyanea, 

 Crotch, belongs to the same group, and differs very 

 slightly from the species belonging to it. 



L. Lewisii, Crotch, appears to be another variable 

 species as regards size, colour of legs, &c. I believe 

 that L. geniculata, Har., and very probably L. nara, 

 Lewis, are merely varieties of this species, and that 

 some of the allied unicolorous aeneous species stand in 

 need of further revision. 



In studying the Langurics it is impossible to help 

 being struck by the fact that certain of the groups of 

 species are extremely variable in points that in more 

 highly organised Coleoptera are always constant, so 

 much so that it is in many cases almost impossible to 

 draw the line between species and species ; this is more 

 particularly the case with regard to sculpture. The 

 sexual differences, which in ^ome genera (e. g., Donble- 

 daya) are very remarkable, also give rise to considerable 

 confusion, and in describing new species must be care- 

 fully taken into account. 



Mr. Lewis, as quoted at the beginning of this paper, 

 regards the Languriidce as a, comparatively speaking, 



