NORTH AMERICAN BOSTRICHIDAE 9 



Melalcus confertus (LeConte) 



Polycaon confertus LeConte, 1866, Smithsn. Inst. Misc. Collect. 167: 103; Horn, 



1878, Amer. Phil. Soc. Proc. 17: 552, 554: Riley, 1882, Amer. Nat. 16: 747; 



Lintner, 1896, N. Y. State Mus., Rpt. 49 1 1895), p. 268; Fall, 1901, Calif. Acad. 



Sci, Oceas. Papers 8: 25, 134; Herbert, 1920, Jour. Econ. Ent. 13: 360-361. 

 Ueterarthron confertus Lesne, 1896, Soc. Ent. de France Ann. 65: 114, 116-117, 



125; 1938. in Junk (pub.), Coleopt. Cat., pt. 161, p. 27; Anderson, 1939, Wash. 



Ac-ad. Sci. Jour. 29: 388, figs. 19-20. 

 E vopioides incisa LeConte, 1868, Amer. Ent. Soc. Trans. 2 : 64; Horn, 1878, Amer. 



Phil. Soc. Proc. 17 : 554. 



Mole. — Elongate, cylindrical, uniformly reddish brown, sometimes 

 underside of body darker, and antennae, palpi, and tarsi slightly paler. 



Head in front subequal in width to pronotum at apex, strongly 

 convex, with a narrow, longitudinal, median line on occiput, finely, 

 densely granulose, sparsely clothed with short, inconspicuous, re- 

 cumbent hairs, with a few long, erect, black hairs intermixed ; clypeus 

 flattened or broadly, feebly, transversely concave at middle, broadly, 

 slightly, arcuately emarginate or subtruncate in front ; labrum trans- 

 versely concave, deeply, broadly emarginate in front; eyes separated 

 on the front by at least six times their own diameter. Antenna 10- 

 segmented, with a few long and short, erect hairs intermixed. 



Pronotum quadrate, at most only slightly wider than long, widest 

 near apex, broadly, vaguely, transversely depressed along anterior 

 margin, with a narrow, longitudinal median line on basal two-thirds ; 

 sides rounded near apical angles, obliquely narrowed posteriorly ; sur- 

 face finely, densely granulose, rather densely clothed with short, re- 

 cumbent, yellowish hairs, with a few long, erect, black hairs inter- 

 mixed. 



Elytra at base slightly wider than pronotum at apex, arcuately 

 declivous posteriorly; sutural margins slightly elevated on apical 

 declivity: sides parallel, arcuately emarginate at apices; surface 

 rather coarsely, shallowly punctate or vaguely rugose on disk, densely 

 granulose at sides, sparsely clothed with short, recumbent, yellowish 

 hairs, with a few long, erect, yellowish hairs intermixed. 



Body beneath densely, finely punctate, densely clothed with long, 

 erect and recumbent, yellowish hairs. 



Female. — Differs from the male in having the clypeus usually more 

 convex at middle and more shallowly emarginate in front; the head 

 more densely granulose, and the elytra broadly conjointly rounded at 

 apices and usually very densely, coarsely granulose over the entire sur- 

 face, the granules more or less confluent and elongate. 



Length 7-13 mm., width 1.7-3.7 mm. 



Type locality. — Of confertum, California, no definite locality; type 

 in the Ulke Collection in the Carnegie Museum. Pittsburgh, Pa. Of 

 mcisa, California, no definite locality; type in the LeConte Collection 

 in the Museum of Comparative Zoology. Cambridge. Mass. 



Distribution. — From material examined; 



California: Oakland. May 16. 1032 (E. C. Zimmerman). Placerville i H. E. 

 Burke). Los Gatos, Santa Clara County (R. E. Blackwelder, E. A. Schwarz). 



Blair's Ranch, Redwood Creek, Humboldt County. June 9. 1903 i 11. S. Barber). 

 Napa County ( H. F. Wickham). San Diego (F. H. Chittenden). Walnut 

 Creek, June 3, 1912 (R, L. Nougaret). Santa Cruz Mountains. Fresno, April 15 

 i E. A. Schwarz). Sacramento. Santa Rosa. San Francisco. 

 Oregon : Ashland, April 6, 1915, Phoenix (A. D. Hopkins). Eugene. June 2. 1941. 



