1873.] OOL [Horn. 



moderately impressed, lateral sulcus moderately deep in front, gradually 

 shallower behind and not attaining the basal margin, marginal space moder- 

 ately convex, sparsely punctured, more densely in front, disc sparsely and 

 finely punctured, unequally divided by transverse sulcus. Elytra fre- 

 quently with two rudimentary dorsal and oblique humeral stria?, surface 

 sparsely and rather finely punctured ; marginal stria fine extending one- 

 third. Pygidium moderately coarsely but not densely punctured. Meta- 

 sternum sparsely punctured. Prosternal sulci broad, deep, transverse 

 sulcus much broader, anterior prosternal division transversely oval, pos- 

 terior small, obtusely cariniform. Length .07-.09 inch ; 2-2.5 mm. 



One of our most distinct species, easily known by its black, shining, 

 sparsely and rather finely punctured surface. 



Occurs in Nevada and Oregon ; in the latter place collected rather 

 abundantly by Lord Walsingham. 



Bacaxius, Lee. 



Frontal suture distinct. Eyes coarsely granulated. First joint of an- 

 tennse gradually thicker to the tip, second joint broader than long, rhom- 

 boidal, third longer than the two following, antennal fossa as in Dendro- 

 philus. Prosternum broader than long, at tip truncate, lobe nearly as 

 long as the prosternum, mesosternum truncate. Anterior tibia; dilated 

 and bidenticulate, middle and hind tibiae dilated, but less than the an- 

 terior. 



The species of this genus are all minute and are thus distinguished : 

 Prosternum and mesosternum smooth sparsely punctured, 

 mesosternal stria visible at the sides, obliterated at mid- 

 dle. Elytral punctures simple. 

 Elytra with subhumeral and first dorsal entire. Epipleural 

 fold smooth, impunctured. Pygidium very minutely 



punctulate misellus. 



Elytra with subhumeral abbreviated at apex, first dorsal 

 short. Epipleural fold sparsely punctured. Pygidium 



punctured , tantillus. 



Prosternum and mesosternum coarsely foveato-punctate, 

 mesosternal stria entirely obliterated. Subhumeral 

 stria wanting, first dorsal entire, broadly arching at 

 base and returning. Epipleural fold coarsely punctured. 

 Pygidium coarsely punctured. Elytral punctures sub- 



strigose punctiformis. 



B. missllus, Lee. Proc. Acad., 1853, p. 292 ; Mars. Mom, 1856, p. 

 573, pi. 14, No. 41, fig. 3. 



Broadly oval, subglobose, brownish-red, moderately shining. Head 

 very sparsely and minutely punctulate. Thorax sparsely and finely 

 punctured. Elytra more coarsely punctured, punctures simple and 

 sparsely placed, subhumeral stria entire, first dorsal entire, more deeply 

 impressed thau the subhumeral. Pygidium shining, very sparsely and 



