Casey — A Revision of the American Paederini. 171 



ing slightly truncate toward the middle ; fimbriate sides — making an 

 angle of 45° with a transverse line — feebly curved. Length 3.9 mm.; 

 width 0.7 mm . California (Sonoma Co.) laugnidnm Csy. 



14 — Moderately slender, fusco-testaceous, the head and abdomen black, 



the flanks of the elytra nubilously paler, the legs pale; anterior parts 

 rather shining, the punctures small and not dense, fine and dense on the 

 elytra and abdomen; head rather small, distinctly wider than long, the 

 basal angles only moderately broadly rounded, the base broadly trun- 

 cate, the neck a little narrower than usual, the sides behind the eyes 

 straight and parallel, the eyes larger than usual, more than half as long 

 as the distance thence to the base of the head ; prothorax well devel- 

 oped, fully as wide as the head or a little wider, almost as long as wide, 

 broadly rounded at apex, the sides parallel ; elytra quadrate, a fourth 

 wider and nearly one-half longer than the prothorax; gular sutures 

 widely separated anteriorly, straight and gradually convergent thence 

 nearly to the base, becoming very approximate, the space between them 

 anteriorly densely and roughly sculptured, the intersutural area very 

 feebly impressed. Length 3.9 mm.; width 0.8 mm. Arizona. 



apacheauam n. sp. 



15 — Species inhabitating the regions immediately bordering the Pacific 



Ocean 16 



Species inhabiting the high Sierras and eastward 22 



16 — Prothorax more or less distinctly wider than long 17 



Prothorax smaller, oblong, fully as long as wide and apparently longer, 



always narrower than the head ; species frequently very smail in size, 

 the neck narrower than usual 21 



17 — Gular sutures very widely separated, the intervening space at the 



narrowest point wider than the maximum width of the third palpal 



joint 18 



Gular sutures less widely separated, the intervening space slightly narrower 

 than the width of the third palpal joint 19 



18 — Body rather small and slender, feebly shining anteriorly with the head 



more alutaceous, dark testaceous in color, the head somewhat and the 

 abdomen notably, darker, piceous, the elytra clouded with piceous; 

 legs pale; head finely, rather closely punctate, convex, rather wider 

 than long, very slightly wider than the prothorax, straight and parallel 

 at the sides behind the rather small eyes, the basal angles broadly 

 rounded; prothorax only just visibly wider than long, nearly straight 

 and subparallel at the sides, sparsely punctate; elytra rather longer 

 than wide, fully two-fifths wider and one-half longer than the prothorax; 

 gular sutures broadly arcuate, feebly impressed, least separated at, or 

 a little behind, the middle of the post-oral surface, which is rather 

 finely and sparsely punctate. Median process in the apical sinus of the 

 fifth ventral rather narrow, scarcely more than a third as wide as the 

 sinus, broadly sinuato-truncate throughout its width at apex, its lateral 

 angles well marked and rectangular, its sides short, rectilinear and 

 parallel; surface with an arcuate series of long and widely spaced 

 bristles at some distance before the process but otherwise unmodified; 

 fimbriate sides of the segmental sinus distinctly curved, each having 



