562 Coleopterological Notices, V. 



Group IV. 

 External subhumeral stria contiguous to the marginal ; elytral punctures 

 abruptly coarse posteriorly, not distinct near the base (type pectoralis). 

 Larger, black, without aeneous lustre ; mesosternum coarsely, densely punc- 

 tate ohsidianiis 



Smaller, more narrowly oval ; lustre evidently aeneous ; mesostHnunn finely 



and sparsely punctate Sll1)aeratus 



External subhumeral distinct and diverging from the marginal ; elytral punc- 

 tures not abruptly coarse posteriorly and visible over the entire disk 

 (type ohscurus). 

 Dorsal striae long, almost extending to apical fourth ; body oblong-oval, 



larger laraiiiiensis 



Dorsal striae shorter, extending but slightly behind the middle ; body 

 shorter, oval audax 



Group V. 

 Form, coloration and sculpture very nearly similar to pennaijhamcun ; pygidiutn 

 tumid and carinate toward apex, broadly impressed toward the sides except 

 near the base profusU8 



Group Vr. 



Elytra without distinct punctuation except in about apical half SOCillS 



Elytra punctate throughout, but generally feebly and finely so toward base, 



the punctures sometimes ratber abruptly coarser and denser behind. 



Pronotum evidently more coarsely and densely punctate near the sides. 



leiitus 

 Pronotum not more strongly and generally scarcely more densely punctate 

 toward the sides, distinctly and evenly punctate throughout the disk. 

 Sutural stria entire ; lustre dull ; punctures strong and dense tbroughout. 



opacellus 

 Sutural stria abbreviated at basal fourth ; punctures stroiiji and dense 



throughout, more or less confluent posteriorly Cl'ibruni 



Sutural stria abbreviated or obsolescent in basal third ; pnnctuies sparse 

 throughout ; lustre polished. 

 Larger, broadly oval ; sutural stria wholly obsolete toward apex. 



(letractiis 

 Small, narrowly oval ; sutural stria attaining the apex... contractus 



Group VII. 

 Prothorax fimbriate at the sides ; body black, opaque, punctured throughout, 



iutritus 



Group VIII. 

 Elytra with a distinct sutural stria which is abbreviated or inteii npted behind. 



Elytra without trace of punctuation at any part illipiliictelllis 



Elytra punctured nearly as \\\ fraternus ; pronotal sculptuie nanowly effaced 

 along the lateral margins laxatus 



