NORTH AMERICAN COLEOPTERA. i 



8. — Black, elytra with an elongate pale yellow spot from the middle of the base of 

 each hooked to the side margin at the middle, and a transverse spot at the 

 hindmost fourth from the side nearly to the suture; 5-6 mm. Northern 



Canada; Vancouver 9. Stiginosus. 



Varies with the spots very small. 



Black, elytra with a large ba.sal spot often extending beyond the middle, and 



a posterior one orange ; 5.5 mm. California.. ..10. c|uadriniacula.tus. 



Black, elytra orange, scutellar spot and two transverse bands connected along 



the suture black; 8 mm. Californi.a 11. Rogersii. 



9. — Very black, pubescence black ; prothorax sparsely, finely punctured, disc and 

 Hanks bright red ; antennae strongly serrate, 3d joint as large as 4th. 



12. lepidus. 



B. — Hind angles of prothorax bicarinate. 



Elongate, sub-cuneiform, pubescence brown ; prothorax longer than wide deeply 

 punctured, narrowed near the front, hind angles acutely bicarinate; elytral 

 striae fine, interspaces slightly convex, finely punctured ; antennae as long 

 as the prothorax, slender, 2d and 3d joints united as long as the 4th ; 1 (I mm. 

 Missouri 13. angularly. 



Bibliography. 



3 . M. tartareus Lee. Proc. Ac. Nat. Sc. Phila. 1859, 85 ; this species and aier- 

 rimus bear a remarkable resemblance to Elater Sturmii, but the last has the pros- 

 ternal sutures distinctly excavated in front. 



2. M. tiirbiileiitiis Lee. Trans. Am. Phil. Soc. X, 463 ; Cand. Mon. El. II, 50S 



3. M. aterriiiiiis Horn, Trans. Am. Ent. Soc. IT^Tl, 309. 



4. M. grauulosii»« Mels. Proc. Ac. Nat. Sc. Phila. II, 159 (Ectinu.^) ; Cand. 

 Mon. El. II, 497 ; Sturmii Lee. loc. eit. X, 463. 



5. M. limbalis Herbst, Kafer, X, 53, pi. 162, fig. 10; Say, Trans. Am. Phil. 

 Soc. VI, 167 ; ed. Lee. II, 601 ; Germ. Zeitschr. V, 164; Lee. loe. cit. X, 463 ; Cand. 

 Mon. El. IV, 312 (Ludius). 



<). HI. nigrivt<^ntris n. sp. — Slender, sub-cuneiform, black with fine, short 

 vellow pubescence, legs and prothorax bright red, the latter longer than wide, 

 hroadlj' on the sides, hind angles not divergent nor strongly carinate; prosternum 

 black. Elytra deeply .rugosely punctured. Antennae long slender, black, in the 

 male with stiff" erect hair, 2d and 3d joints" small united shorter than the 4th ; 

 8 mill. 



Calilurnia and Washiiiyton Territory. 



7. M. riifllabri!^ Germ. Ins. Nov. 47: Zeitschr. V. 169: Lee. loc. cit. X, 472 ; 

 Cand. Mon. El. II, 498. 



8. M. elegailS Horn, Trans. Am. Ent. Soc. 1871, 310, pi. IV. fig. 12. 



9. 1?I. stigniosus Lee. loc. cit. X, 472; Cand. Mon. El. II, 509 ; caprella Lee. 

 Pacific Expl. and Surv. XI, 47 ; Cand. Mon. El. II, 510. 



10. M. quadriiiiaciilatiis Horn, Trans. Am. Ent. Soc. 1871, p. 313. 



11. M. ISogersii Horn, Trans. Am. Ent. Soc. 1871, 310, pi. IV, fig. 9. 



12. M, lepidiis n. sp. — Very black, with a bluish tinge, pubescence black, form 

 sub-cuneiform, less elongate than in the other species ; prothorax finely sparsely 

 punctured, disc and flanks bright red, narrowed from the base, longer than wide 



