170 SHUCKARD ON THE 



knees and tarsi piceous : the occiput, the centre of the meso- 

 thorax, the base of the second segment, and the entire third 

 segment of the abdomen, of a beautiful blue, the latter serrated at 

 its extremity, having thirteen teeth, the three central ones most 

 distant from each other, the others smaller and closer together: 

 head and thorax deeply punctured, the abdomen less so ; the 

 second segment having an elevated, central, longitudinal, smooth 

 line: the wings slightly clouded. (Length, 4 lines.) 



I know no locality fov this beautiful and apparently very 

 rare insect ; the only British specimen I have seen is in the 

 British Museum; it is said to have been captured by Dr. 

 Leach. I have been obliged to reject every synonyme of the 

 Chr. sexdentata of Fabricius and Panzer, as all mention six 

 terminal teeth to the abdomen, Latreille only noticing its 

 serration ; but, as he calls it by a name evidently belonging to 

 another insect, and not at all appropriate, I cannot do better 

 than retain Leach's MS. name, under which it stands in the 

 collection of the Museum. 1 quote Fabricius's synonyme with 

 doubt, on account of the locality he gives, and yet I think it 

 deserves retaining, as the species may be widely distributed, 

 for I possess specimens from the Cape of Good Hope which 

 perfectly correspond, differing only a litde in size ; but, if this 

 doubt can be overruled, Fabricius's name must take the place 

 of Leach's. 



Genus IV. — Hedychrum, hair. 



Head transverse : thorax oblong, quadrate, truncated at both extre- 

 mities, the metathorax having a minute tooth on each side : 

 abdomen consisting of three segments ; in the first section, semi- 

 circular, convex above ; in the second section, more elongate, 

 gibbous above, and marginate at its extremity : superior wings in 

 the first section with a marginal cell nearly complete, the radial 

 nervure which encloses it gradually terminating upon the super- 

 fices, before reaching the extremity ; a first recurrent nervure, 

 and incipient cubital, and the discoidal nervures, very slightly 

 traced, but distinctly existing ; the commencement of the subdis- 

 coidal more strongly marked, but leaving the first apical cell in- 

 complete ; in the second section the radial nervure terminates very 

 abruptly shortly after its commencement, and in some specimens 

 a line of colour merely indicates its course, which also obsoletely 



