AMERICAN COLEOPTERA. 175 



2.— Head semicircularly rounded behind the eyes, very sparsely punctured...?:. 

 Head longer, more oval, less semicircularly rounded beiiind, more thickly 



punctured; color black, antennae brown, legs ferruginous 4. 



Head truncate behind, with rounded angles '"•• 



3. — -^ sixth ventral deeply and acutely incised; 6 — 7 mm.; Xortheru and 



Western States, Kansas 2. punctiilatuiii. 



% sixth ventral much less deeply incised; 6 mm.; Southern States. 



Z. angulare. 

 % sixth ventral deeply incised; smaller, entirely black : b.'-i mm.: Mass.; 



Lake Superior 4. uigriini. 



% sixth ventral deeply incised, fifth strongly impressed; still smaller, 

 black, antennae, legs and elytra ferruginous, the last more strongly |)un(;- 



tured: 4.5 mm.; Detroit, Mich,; (one specimen) 5. bicoloi' n. sp. 



% sixth ventral with a small acute incision, fifth with a rounded apical 

 impression; head rather longer, color black, shining, antennse brown, 

 first joint testaceous, legs yellow, elytra less densely punctured ; 4.5 mm.: 



Michigan; Florida «. nitidulum n. sp. 



4. — Head and elytra more coarsely punctured 5. 



Head and elytra finely punctured; black; legs black, rarely ferruginous : 



5.8 mm.; Vancouver; B.Columbia 7. finitiiuuin n. sp. 



5.— Head more densely punctured; '^ sixth ventral acutely earinate behind, 

 and triangularly emargiuate; black, antennte and legs brown; 8 mm.: 



California, (San Mateo, Gilroy) S. piiiicticeps n. sp. 



Head less densely punctured, especially in front: % sixth ventral broadly 

 and feebly emarginate; black, antennse, legs and elytra brown, not punc- 

 tured in rows; €.5 — 8 mm.: California, (S. Mateo, S. Diego). 



9. jacobinnin. 

 Head less densely punctured; elytra punctured almost in rows; % sixth 

 ventral broadly and feebly emarginate, fifth with a small impression; 

 black, antennae and legs brown; 6.5 mm.; Vancouver; California. 



10. subseriatuin n. sp. 



6. — Cylindrical convex, head sparsely punctured 7. 



Less convex, almost depressed 10- 



7. — Elytra as long as the prothorax 8. 



Elytra much shorter than the prothorax, coarsely and distantly punctured, 



color uniform brown; %"! 7.8 mm.; Illinois U. brevipeiiuo. 



S. — "J, sixth ventral emarginate 5'- 



% sixth ventral subearinate at tip, not emarginate: black, antennte and 

 legs brown, the former stouter than usual, with rounded joints; 8.2 mm.: 



Western States 12. ariiiatuni. 



<».— '^ sixth ventral squarely emarginate, with a medial smooth space limited 

 by short longitudinal impressions; fifth ventral feebly impressed ; black, 

 antennae stout with rounded joints, legs piceous or ferruginous: 5.4 mm.; 



Oregon; Mass 13. otliioides n. sp. 



% sixth ventral broadly and deeply emarginate, and deeply longitudinally 

 impressed; fifth longitudinally but feebly impressed; black, antennae and 



legs brown; 7.5 mm.; Mass.; N. Y 14. simile. 



% sixth ventral broadly semicircularly emarginate. and longitudinally im- 

 pressed ; fifth broadly impressed; black, antennae and legs In-own: 5.5— 

 6.5 mm.; Lake Superior; Illinois 15. COUC-olor. 



