259 



H. Intermediate tarsi 

 nearly twice as long 

 as thoir tibire ... 



HH. Intermediate tarsi 

 very little longer 

 than their tibiae ... 

 GG. Dorsal snrface some- 

 what brilliantly iri- 

 descent 

 FF. Prothorax much less 

 transverse 

 EE. Pronotum very finely and 

 sparsely pnnctnlate ... 

 DD. Prothorax at its widest be- 

 hind middle. 

 E. Hind angles of prothorax 

 from all points of view 

 rounded or very obtuse. 

 F. Lateral parts of pronotum 

 very closely (almost con- 

 fiuently) punctulate 

 FF. Lateral parts of pronotum 

 much less closely punctu- 

 late. 

 G. Body entirely atro-cya- 

 neous (strongly irides- 

 cent) 

 GG. Body ferruginous or 

 testaceous. 

 H. Hind angles of pro- 

 thorax quite distinct, 

 though strongly obtuse 

 HH. Hind angles of pro- 

 thorax quite rounded 



off 



EE. Hind angles of prothorax 



rectangular (viewed from 



above), scarcely blunted 



CC. Hind corners of prothorax quite 



strongly explanate. Head pilose 



BB. Joint 2 of antennae quite slender 



(as the 3rd joint) 



AA. Antennae consisting of nine joints ... 



planiceps, Blachb. 



parvipes, Blackb. 



gravicollis, Blackb. 

 tetricus, Blackb. 

 consanguineus, Blackb . 



creber, Blackb. 



micans, Blackb. 



chalceus, Blackb. 



indignus, Blackb. 



rectangulus, Blackb. 



nigrolineata, Boisd. 



antennalis, Blackb. 

 hirticeps, Blackb. 



A. Harti, Slip. This species must be extraordinarily close 

 to my A. (Sericesthis) planiceps, which was described almost 

 simultaneously with it. Nevertheless as Dr. Sharp states that 

 the pygidium of Harti is "smooth towards the apex," and I 

 find no trace of such a character in any of the numerous speci- 

 mens before me of planiceps, I am obliged to treat them as 

 distinct species. And here I may remark that, in spite of the 

 apparent likelihood of the female differing from the male as 

 indicated by Dr. Sharp, I am by no means satisfied that the 

 specimens which he regarded as females of Harti are not really 

 examples of another species. I have specimens of A. planiceps 

 presenting no definite tarsal differences inter se, which seem to 

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