01 fi 



FAMILY IV. 



nn. Declivity retuse, with 1 to 3 coarse denticles on third inter- 



space. 

 o. Pronotum convex. 



p. Declivity with interspace 1 distinctly elevated and inter- 



space 2 impressed. 995. IMPRESSUS. 



pp. Declivity with interspaces 1 and 2 flat, strial and inter- 



spacial punctures subequal, subconfused. 99G. XYSS.E. 



ppp. Declivity with interspace 1 slightly elevated, 2 flat; punc- 



tures of striae coarse, impressed. 997. FUSCATUS. 



oo. Pronotum flat. 998. VIDUUS. 



mm. Declivity subopaque, apex obtusely rounded. 999. CELSVS. 



981 (- -). XYLKISORUS QUERCUS Hopkins, 1915-a, G3. 



Oblong-elliptical. Dark brown. Pronotum with sides slightly nar- 

 rowed toward base, anterior rugosities fine, closely placed, confused; 

 median and posterior dorsal areas glabrous and shining, lateral area sub- 

 opaque, faintly and closely punctured. Front broad, convex, opaque, with 

 faint median line. Elytral strife obscure; declivity opaque, faintly broadly 

 impressed; interspace 1 flat, unarmed, 3 not elevated, armed with two or 

 three small granules toward the vertex and one slightly larger toward the 

 apex, posterior lateral margin serrate. Length, female, 1.9 mm. 



Baxterville, Mississippi, in 



x sp. 



982 (- -). XYLEBORUS SAXESEXI Ratz., 1837, 167. 



"Female elongate, blackish or brownish-piceous, almost shining, thinly 

 clothed with pale pubescence. Thorax oblong, smooth behind. Elytra 

 feebly punctate-striate, intervals uniseriately punctulate, tuberculate be- 

 hind; apex declivous almost rounded, pruinose; suture and intervals 3 

 and 4 uniseriately cribrately tuberculate, second subsulcate, smooth. Length 

 2 2.5 mm. Male shorter, brownish-testaceous, with longer pubescence, 

 convex, subdepressed. Length 1.5 mm." (Eichhoff.) "Elytral inter- 

 spaces faintly rugose and subopaque, declivity with interspace 2 not 

 strongly impressed, and interspace 1 not strongly elevated, punctures of 

 striae 1 and 2 obscure." (Hopkins.) 



An introduced European species taken in Mississippi in June 



with which JT. xylographus Say 

 has been in part confused by 

 Hnbbard and other authors. 

 Hubbard (1897, 2425) states 

 that the young are assembled in 

 a brood chamber at the end of 

 a gallery penetrating into the 

 heartwood, standing vertically 

 on edge, parallel with the grain, 

 wl th little more space between 

 its walls than the thickness of 

 the beetle's body. The entire 

 surface of the Avails of this chamber is plastered with ambrosia 



Fig. 146. Ambrosia of 

 graphus Say. Greatly enlarged. 

 Hubbard.) 



xylo- 

 (After 



