NEOCOLLYItlS. 



237 



]. Colour dark brown, pitchy, or rufo- 

 castaneous (occasionally with a 

 slight metallic reflection), with the 

 apex of the elytra often lighter ; 

 middle portion of the elytra more or 

 less roughly plicate. 



A. Elytra densely punctured to apex, 



with the apical punctures elongate. 



a. Size larger ; pronotum longer ; 



sculpture of the apex of the elytra 

 less marked, central portion with 



more plicae fece, W. Horn, p. 264. 



b. Size smaller ; pronotum much 



shorter ; sculpture of the apex of 

 the elytra very strongly marked, 



central portion with fewer plicae . . tripartita, Fleut , p. 264. 



B. Apical third of elytra never densely 



punctured with elongate punc- 

 tures, often almost smooth. 



a. Antennae quite filiform to the end, 



all the joints long, last joints not 



shortened rubens, Baits, p. 269. 



b. Antennae slightly thickened towards 



apex, or, at least, with the last 

 joints a little thickened. 

 a*. Pronotum very long and slender, 

 with a long thin collum. 

 af . Basal third of elytra remotely, 

 and often very sparingly, 



punctured sar awaken sis, Thorns., p. 268. 



&t« Basal third of elytra thickly 

 and coarsely punctured, more or 



less rugose samwakensis var c dohertyi, 



6*. Pronotum variable, sometimes HV. Horn, p. 269. 



much dilated, with a well- 

 marked collum, at other times 

 passing gradually into the 

 collum, but always less elongate, 

 stouter and less sculptured than 

 in the preceding species, 

 at- Form broader, longer (22 



23 mm.) ; pronotum with a 



strong parallel-sided dilatation 



before the base, which is 



abruptly constricted into a 



short and very distinct collum : 



apical third of elytra some- 

 what distinctly, but not closely, 



punctured smithi, Chaud., p. 265. 



b\. Form narrower and more 

 slender, smaller; collum, as a 

 rule, not so abrup'tly separated ; 

 apex variable, but inclined to 

 be smooth. 



