NORTH AMERICAN BOSTRICHIDAE 105 



Genus XYLOPERTHELLA, New Name 



1. Sutural elevation on apical declivity of elytra armed with distinct, erect 



teeth ' 2 



Sutural elevation on apical declivity of elytra unarmed, without erect 

 teeth " 7 



2. Teeth on sutural margins of apical declivity of elytra at middle of de- 



clivity suturalis (Horn), p. 105. 



Teeth on or near sutural margins on apical declivity of elytra above 

 middle of declivity 3 



3. Teeth near sutural margins on apical declivity of elytra large, and dis- 



tinctly separated at bases 4 



Teeth on sutural margins on apical declivity of elytra small, and con- 

 tiguous at bases 6 



4. Tips of elytra obtusely angulated, perpendicularly elevated and angularly 



separated at sutural margins: apical declivity with a distinct tubercle 

 at lateral margins, and the surface rather densely clothed with loner, 



recumbent hairs lesnei, new* species, p. 106. 



Tips of elytra conjointly rounded, not perpendicularly elevated at sutural 

 margins; apical declivity with or without a distinct tubercle at lateral 

 margins, and the surface sparsely clothed with short, recumbent hairs^_ 5 



5. Apical declivity of elytra coarsely punctate, except along sutural margins: 



sutural stria on each elytron narrowly, deeply depressed and punctate 



on anterior part of declivity bidentata (Horn\ p. 107. 



Apical declivity of elytra smooth and vaguely punctate over entire surface: 

 sutural stria on each elytron broad and smooth on anterior part of 

 declivity monticola, new species, p. 108. 



6. Concave surface on apical declivity of elytra sparsely punctate; sutural 



stria on each elytron shallow and not distinctly punctate near apical 



declivity of elytra arizonica Lesne, p. 109. 



Concave surface on apical declivity of elvtra not punctate: sutural stria 

 on each elytron deeply depressed and coarsely punctate near apical 

 declivity of elytra declivis (LeConte), p. 110. 



7. Apical declivity of elytra obliquely deflexed, margined at sides; tips of 



elytra not thickened or elevated at sutural margins 



chevrieri (Villa), p. 112. 

 Apical declivity of elytra arcuately deflexed, not margined at sides: tips of 

 elytra thickened and elevated at sutural margins 



barbata (Wollaston), p. 113» 



Scobicia suturalis (Horn) 



Sinoxylon suturale Horn, 1878, Amer. Phil. Soe. Proc. 17:542, 544: Coquillett, 



1892, Insect Life 4 : 261. 

 XyJopertha suturalis Casey, 1898. N. Y. Ent. Soc. Jour. 6: 67. 

 Scobicia suturalis Lesne. 1901. Soc. Ent. de France Ann. (19a)) 69: 586-587, 596- 



597, figs. 437^38 ; 1938, in Junk (pub.), Coleopt. Cat., pt 161, p. 58. 



Male. — Dark brown, with basal half of pronotum and elytra, anten- 

 nae, palpi, femora, and tarsi reddish or yellowish. 



Head rather flat, sparsely, finely punctate on front and clypeus. 

 with long, longitudinal, parallel costae on occiput, densely clothed 

 with very long, erect, brownish-yellow hairs, which are shorter ami 

 inconspicuous at middle behind clypeus; clypeus flat, slightly de- 

 pressed at middle along posterior margin; clypeal suture arcuate, and 

 rather distinct at middle, obsolete at sides. 



Pronotum slightly wider than long, widest at middle: sides broadly 

 rounded, more strongly converging anteriorly, with a small, broad 

 tooth at apical angles; posterior angles broadly rounded: surface 

 sparsely clothed at sides with long, erect brownish hairs, and on apical 

 half with short, inconspicuous, erect hairs, very finely, sparsely punc- 

 tate on basal half, more distinctly punctate along sides on apical half 

 and at middle behind anterior margin, densely, irregularly dentate on 

 apical half of disk, the teeth broad, semierect. variable in size, and 

 rasplike. 



