NEW AMERICAN" SCOLYTOID BEETLE'S — BLACKMAN 395 



constricted anteriorly, anterior margin very broadly rounded, 

 scarcely impressed posterior to it; surface shining but mostly con- 

 cealed by scales, punctures dense but very shallow, interstices variably 

 granulate in median area ; lateral areas with rather numerous, coarse 

 asperities arranged as a submarginal row in front and extending to 

 base and across anterior disk, smaller behind and in anterior median 

 area; color markings produced by scales of two colors — dark-brown 

 scales in a nearly regular, diamond-shaped median area and an ir- 

 regular area at each side of disk, and at each side two light areas 

 formed by light-yellow cinereous scales, one at extreme sides and one 

 between the median and lateral dark areas. 



Elytra wider than pronotum and 2.07 times as long, 1.35 times as 

 long as wide; bases arcuate, elevated, and serrate; sides subparallel 

 on anterior half, then gradually narrowed to the narrowly rounded 

 apex; dorsal contour oblique, arcuate from middle to apex; surface 

 shining, but almost entirely hidden by scales and hairs of two colors; 

 striae impressed, punctures small and indistinct; interspaces wide, 

 nearly flat on disk, more or less convex behind, granulate-punctate 

 with larger granules or asperities, densely clothed with scales varying 

 from subcircular to slender and with a few hairs, with hairs or 

 slender scales forming the middle row in each interspace on sides and 

 on anterior part of disk, these replaced on posterior half by erect or 

 semierect, broad scales which exaggerate the convexity of the poste- 

 rior part of most interspaces. Declivity sloping, suture decidedly 

 convex, second interspace narrow, fiat, appearing depressed, third 

 interspace broad, convex, the others slightly convex. Color pattern 

 of elytra formed by arrangement of dark-brown scales and hairs and 

 yellow-cinereous scales and hairs as follows: A dark band at base, 

 then a wider, irregular, light band, next an irregular dark band, in- 

 complete at sides, followed by a light, irregular, oblique band, and 

 finally an irregular dark spot involving interspaces 2 and 3 ; posterior 

 border and sides prevailingly light. 



Male. — Similar to female in habitus; frons flattened from eye to 

 eye, reticulate, subshining, finely punctate, with hair as in female; 

 median carina short, blunt, shining, midway between epistomal mar- 

 gin and upper level of eye. 



Type locality. — Sabino Canyon, Ariz. 



Host. — Fraximis sp. 



Type material. — Holotype, allotype, and 19 paratypes, U. S. N. M. 

 No. 56573. 



Holotype, allotype, and 12 paratypes taken from felled ash trap 

 tree, at Sabino Canyon, Ariz., May 20, 1918, by George Hofer, 7 

 paratypes taken from Fraocinus sp. at Meek, N. Mex., by W. F. Fiske. 



