HOEISTONOTUS. 429 



b". Elytra more parallel in front, narrowing from about the middle ; the 



interstices convex throughout rujiventris. 



b'. Alternate elytral interstices not costate before the apex hcemorrhoidalis. 



b. Claws bicuspid, the inner tooth very short and fine; prothorax with a single 



short deep sulcus on either side at the base, the punctuation mixed ; 

 antennae very elongate, the joints from the third dilated; frontal carina 

 defiexed in the middle ; scutellum concave 4 dilaticornis . 



c. Claws sharply or rectangularly dilated from the middle to the base ; frontal 



carina prominent ; antennae slender. 



c'. Prothorax without notches or sulci at the base, the punctuation mixed ; 



scutellum convex or feebly convex ; prothorax and elytra subparallel 



towards the base. 



c". Prothorax with the base sinuous on either side, the larger intermixed 



punctures becoming much coarser on the anterior half, fine at the 



base obliteratus. 



d". Prothorax with the base subtruncate on either side, the larger inter- 

 mixed punctures becoming coarser towards the sides and base, those 

 in the transverse basal depressions very coarse and conspicuous . . truncatus. 

 d'. Prothorax with a long sulcus on either side at the base, the punctuation 

 mixed ; scutellum concave ; elytra narrowing almost from the base, the 



apical interstices costate, the apices obtuse sulcifer. 



e'. Prothorax with a shorter sulcus on either side at the base, the punctuation 

 mixed ; scutellum flattened ; elytra narrowing from about the middle, 

 the apical interstices not costate, the apices somewhat pointed .... spernendus. 

 f. Prothorax bi-incised on either side at the base ; scutellum concave or 

 flattened. 

 e". The prothoracic punctuation mixed ; the elytra moderately rounded at 

 the sides, or subparallel towards the base. 

 c"'. Elytra deeply punctate-striate, the interstices more or less convex. 

 a*. Antennae ferruginous or testaceous. 

 a 5 . Upper surface opaque, thickly pubescent; prothorax densely 



punctured duplicatus. 



b'\ Upper surface more or less shining, more sparsely pubescent ; 

 prothorax less densely punctured. 



a 6 . Prothorax subparallel behind flavipes. 



b*. Prothorax more or less narrowed behind. 

 a 1 . Elytra unicolorous. 



a*. Prothorax feebly convex, moderately rounded at the sides, 



the larger intermixed punctures coarse mixtus. 



b 8 . Prothorax convex, strongly rounded at the sides, the 



larger intermixed punctures finer rotundicollis. 



b"' ' . Elytra with the base to a greater or less extent and a median 

 fascia rut'o-testaceous, the markings sometimes reduced to 

 a small basal patch ; the intermixed larger punctures on 

 the prothorax distinct only at the apex bicinctus. 



