Horn.] ddtb [June 20, 



under the arch of the fourth dorsal ; marginal stria arched at hase ; ex- 

 ternal subhumeral confounded with the marginal, humeral fine, internal 

 subhumeral obliterated ; dorsal striae very short indistinct, except at 

 base where all are more or less arched, fourth joining the sutural which 

 extends very indistinctly nearly to apex. Pygidium and propygidium 

 densely and coarsely punctured. Anterior tibiae with two very coarse 

 teeth at apex, above which the tibne are finely serrulate ; hind tibiae stout, 

 densely spinulose. Length .18-20 inch ; 4.5-5 mm. 

 Occurs on the sea-coast of California. 



Teretrius, Erichs. 



Body cylindrical, prosternum emarginate at tip, receiving the meso- 

 sternum, tihiae denticulate. Antennae frontal, antennal fossa at the sides 

 of thorax under the anterior angle. 

 Two species only occur in our fauna. 



Elytra witli a short, very oblique stria at base obliquulus. 



Elytra punctured without stria americanus. 



T. obliquulus, Lee Pacif. R. R. Rep., 1857, p. 3G. 



Oblong robust, piceous shining. Head sparsely punctured. Thorax 

 sparsely punctured, punctures finer and slightly more dense at the sides, 

 marginal stria entire ending abruptly at base. Elytra sparsely punctured, 

 punctures finer toward the sides, subhumeral space smooth, at base a 

 short, very oblique moderately impressed stria. Pygidium moderately 

 coarsely, but not densely punctured. Prosternum broad, broadty eniar- 

 ginate in front, acutely notched behind, mesosternum with entire margi- 

 nal line, coarsely and sparsely punctured. Anterior and middle tibiae 

 6-denticulate, hind tibiae 4-spinose. Length .10 inch ; 2.5 mm. 



Occurs near Sacramento, California. 



T. americanus, Lee. Proc. Acad , 1859, 316 ; picipes \, Lee. Bost. 

 Journ. V., p. 79, pi. 0, fig. 6. 



Oblong, moderately robust, piceous shining. Head sparsely punctured. 

 Thorax sparsely and moderately coarsely punctured, punctures finer at 

 the sides, marginal stria entire, extending slightly along the base very 

 close to the margin. Elytra sparsely and moderately coarsely punctured, 

 punctures coarser at base, subhumeral smooth space small. Pygidium 

 and propygidium moderately coarsely but sparsely punctured. Proster- 

 num subtruncate in front. Anterior tibiae 5-6 denticulate, middle tibiae 

 more coarsely 5-dentate, hind tibiae bispinose at apex. Length .06-. 08 

 inch ; 1.5-2 mm. 



This species is very closely allied to the picipes of Europe, and appears 

 to differ only in the greater distinctness of the lateral margin of thorax, 

 and by the incurved end of the marginal stria being closer to the base 

 so that the slight groove seen in the European form is obliterated. It 

 is probable that with more specimens this slight difference would disap- 

 pear. 



Widely distributed, but appears to be rare. 



