151 



I have made buD little reference to sexual characters in. 

 the descriptions of species of this and the following Groups. 

 The fact is that I have in almost all cases failed to discover 

 any well-marked sexual characters at all, and even the char- 

 acter of the less convexity of the ventral segments in the male 

 (which is, I think, fairly constant) is in many cases not very 

 apparent in specimens that are not fresh and well preserved. 



For the sake of clearness I may, perhaps, say that in 

 descriptions of the basal edging of the pronotum the phrase 

 "ad later a magis elevatus" means that the edging becomes 

 more elevated at the ends of the basal margin than it is in 

 other parts of its length. 



The number of names (including those mentioned below 

 as doubtful, and therefore excluded from the tabulation) of 

 Heteronyces attributable to this Group hitherto published is,. 

 I believe, 37. Of these I have been able to place 32 in my 

 tabulation. I now add 14 new species, bringing the number 

 of identifiable sj)ecies to 47 (one of which, however (H. 

 nigricans, Burm.), is excluded from the tabulation for the- 

 reason mentioned below). 



The following table indicates distinctive characters of the 

 species known to me of this Group, below which will be found 

 notes on some of the previously-described species, and then 

 descriptions of new species : — 



A. Hind cox?e as long as metasternum, or 

 if scarcely so long at least all but 

 covering 1st ventral segment. 

 B. Joint 3 of antennae not or scarcely 

 shorter than joint 2. 

 C. Elytral punctures not very fine 

 and close (about 12 from suture 

 reach to or beyond middle). 

 D. Labrum (viewed from in front) 

 strongly concave longitudinally, 



and not transverse fervidus, Blackb. 



BD. Labrum (viewed from in front) 



an almost equilateral triangle nasutus, Blackb.. 

 DDD. Labrum (viewed from in 

 front) very strongly transverse. 

 E. Labrum (viewed from in 

 front) deeply sulcate longi- 

 tudinally apertus, Blackb. 



EE. Labrum not as E. 



F. Hind angles of prothorax 

 (viewed from above) strongly 



defined comes, Blackb. 



FF. Hind angles of prothorax 

 (viewed from above) quite 

 rounded off. 

 G. Middle lobe divided from 



lateral lobes transversicollis, MacL 



GG. Middle lobe not divided 



from lateral lobes vicinus, Blackb. 



