NORTH AMERICAN BOSTRICHIDAE 43 



All the species are widely distributed throughout the northern parts 

 of Europe, Asia, and North America, except quadrkoVis Marseul, 

 which is restricted to the Mediterranean region. Only 9 of the species 

 occur in North America. 



KEY TO THE SPECIES OF STEPHANOPACHYS 



1. Pronotum with strongly elevated granules on basal half 2 



Pronotum with flattened granules on basal half 7 



2. Elytra with longitudinal rows of elevated granules on intervals on basal 



half of disk, each granule with a short, erect hair arising from the apex_ 3 

 Elytra without distinct rows of elevated granules on intervals on basal 

 half of disk, the intervals smooth, or with irregular shaped granules, 

 each with a short hair arising from the side 4 



3. Granules on basal half of disk of elytra beadlike, each with a round de- 



pression at apex; apical declivity of elytra with strongly elevated 



granules -- .rugosus (Olivier) , p. 43 



Granules on basal half of disk of elytra conical, without a round depression 

 at apices; apical declivity of elytra with moderately elevated gran- 

 ules amplus (Casey), p. 44. 



4. Apical declivity of elytra granulose; lateral margins of pronotum strongly 



t uberculate 5 



Apical declivity of elytra punctate; lateral margins of pronotum slightly 

 serrulate 6 



5. Hairs on basal half of disk of elytra short and recumbent 



substriatus (Paykull), p. 45. 

 Hairs on basal half of disk of elytra short and erect-asperulus (Casey), p. 47. 



6. Pronotum slightly gibbose in front of scutellum; hairs on basal half of disk 



of elytra long, not uniform in length, the long ones at least twice as long 

 as diameter of punctures; mentum subtruncate in front 



sobrinus (Casey), p. 47. 

 Pronotum not gibbose in front of scutellum; hairs on basal half of disk 

 of elytra short, uniform in length, about as long as diameter of punc- 

 tures; mentum feebly lobed conicola, new species, p. 48. 



7. Apical declivity of elytra punctate; labrum irregularly, indistinctly punc- 



tate cribratus (LeConte), p. 49. 



Apical declivity of elytra granulose; labrum coarsely, uniformly punctate. _ 8 



8. Elytra smooth, with circular punctures; pronotum not gibbose in front of 



scutellum, the flattened granules contiguous in front of scutellum, and 

 the teeth along anterior margin short, broadly rounded, not separated at 



bases (vide Casey) densus (LeConte), p. 50. 



Elytra granulose or scabrous; pronotum slightly gibbose in front of scutel- 

 lum, flattened granules separated from one another, and the teeth along 

 anterior margin long, acute, and separated at bases 



hispidulus (Casey), p. 50. 



Stephanopachys rugosus (Olivier) 



Bostrichus rugosus Olivier, 1795, Entomologie, v. 4, Gen. 77, p. 18, pi. 3, figs. 24a-b. 

 Stephanopachys rugosus Lesne, 1896, Soc. Ent. de France Bui., p. 334; 1898, Soc. 



Ent. de France Ann. (1897) 66: 335, 341-342: Leonard, 1928, N. Y. (Cornell) 



Agr. Expt. Sta. Mem. 101: 415; Brimley, 1938, Insects of North Carolina, 



p. 198 ; Lesne, 1938, in Junk (pub.), Coleopt. Cat., pt. 161, p. 21 ; Anderson, 1939, 



Wash. Acad. Sci. Jour. 29 : 388, fig. 2 (larva). 

 Dinoderus porcatus LeConte, 1S66, Smithsn. Inst. Misc. Collect. 167: 101-102; 



Horn, 1878, Amer. Phil. Soc. Proc. 17 : 548, 549 ; Casey, 1898, N. Y. Ent. Soc. 



Jour. 6: 75; Blatchley, 1910, Coleoptera of Indiana, p. 890; Lesne. 1938. in 



Junk (pub.), Coleopt. Cat, pt. 161, p. 21. 

 Dinoderus opacus Casey, 1898, N. Y~. Ent. Soc. Jour. 6: 75 (new synonymy). 

 Stephanopachys opacus Lesne, 1938, in Junk (pub.), Coleopt. Cat., pt. 161, p. 21. 



Pale reddish brown to brownish black, the palpi and antennae 

 sometimes slightly paler. 



Head with front and clypeus sparsely, coarsely granulose, sparsely 

 clothed with rather long, arcuate, semiei'ect, yellowish hairs; mentum 

 subtruncate in front. 



