174 Memoirs on the Coleoptera 



to darker bluish; prothorax more elongate, about a fifth longer than 

 wide, otherwise nearly similar, except that the angulate sides are even 

 less prominent and the basal angles not quite so broadly rounded; 

 elytra nearly similarly sculptured; anterior male tarsi with the first 

 joint not wider than the second, with the pubescent sole extending to 

 basal fourth. Length (cf 9) 20.5-23.5 mm.; width 8.7-10.4 mm. 



Irichroa mutabilis ssp. modulata nov. — Smaller than mutahilis and less 

 convex, black, with feeble violaceous lustre on the anterior parts, the 

 elytra bronzed; prothorax small, not distinctly longer than wide, less 

 narrowed at base, the latter three-fifths the maximum width and not 

 barely more than half as it is in mutahilis; elytra similar but notably 

 less convex; anterior male tarsi with the first joint not distinctly wider 

 than the second, the spongiose sole extending to between basal third 

 and fourth. Length (cf ) 19.2 mm.; width 7.9 mm. 



The following may be regarded as a subspecies of violacea Lee, 

 which apparently is a species distinct from andrewsi and not 

 properly a variety: 



Irichroa violacea ssp. amplicollis nov. — Convex, moderately ventricose, 

 shining, violaceous-black, the elytra brighter cupreo-violaceous; head 

 not quite one-half as wide as the prothorax, the latter a fourth wider 

 than long, the sides abruptly and strongly reflexed, subprominent but 

 rounded just before the middle, thence moderately converging and 

 strongly arcuate to the broadly rounded and subprominent apical angles 

 and more converging and broadly sinuate to the broadly rounded basal 

 angles; base somewhat more than half the maximum width; impressions 

 deep; punctures few and very feeble; elytra oblong-oval, one-half longer 

 than wide, distinctly less than twice as wide as the prothorax, the deep 

 coarse sculpture and the rounded humeri almost as in andrewsi; anterior 

 male tarsi rufo-piceous, the first joint with the dense spongiose sole 

 extending virtually to the base, more nearly so than in andrewsi. Length 

 (c?) 19.7 mm.; width 8.3 mm. North Carolina (Black Mts.), — Beuten- 

 miiller. 



The almost completely spongiose sole of the first anterior tarsal 

 joint of the male, will distinguish this form from violacea quite 

 readily; the prothorax is very much broader than in andrewsi, 

 having a width of 4.7 mm. in the type. 



The genus Irichroa consists of those forms allied to guyoti, 

 andrewsi and others, having a comparatively small prothorax, not 

 elevated at the hind angles. Other species which have been asso- 

 ciated with those mentioned but presenting a very different habitus, 

 being very stout, with larger prothorax elevated at the hind angles, 

 such as vidua Dej., irregularis Beut., and leonardi Harr., do not 

 pertain properly to Irichroa but constitute a distinct genus between 



