1 88 MEMOIRS ON THE COLEOPTERA 



shining, the elytra densely opaque; head with the minute sparse 

 punctulation almost obsolete, the vertex medially rugose, the foveae, 

 rather large, linear, flexed abruptly and strongly inwaid in the type; 

 antennae extending almost to the thoracic base though unusually 

 stout, blackish, gradually paler apically, the basal joint partially 

 testaceous; prothorax rather strongly rounded at the sides, the latter 

 converging and broadly, feebly sinuate posteriorly, the hind angles 

 barely perceptibly more than right and with their tips very finely 

 blunt; surface rather more convex than in the preceding and more 

 deeply declivous at the sides to the similar narrow and deep gutter, 

 which remains unmodified almost to the base, the large elongate- 

 oblong, feeble and densely punctate foveae separated from the sides 

 by a strongly convex prolongation of the general surface, this, as 

 well as the entire surface except the foveae, extremely finely, sparsely 

 and inconspicuously punctulate; stria very fine; elytra not quite 

 one-half longer than wide, parallel, very obtuse at apex, fully a fifth 

 wider than the prothorax, the striae very fine and shallow, the scutel- 

 lar long, the intervals perfectly flat; dorsal puncture at three-fifths 

 distinct; seventh interval with only one puncture, which is at the 

 apex. Length (9) 11.2 mm.; width 4.3 mm. California (San 



Francisco) obsolescens n. sp. 



Apical sinus moderately deep and always very distinct 18 



1 8 Antennae slender 19 



Antennae notably stout in both sexes 20 



19 Body small in size and unusually slender; head almost completely 

 impunctate and with but few feeble rugulae, the foveae linear and 

 evenly arcuate, turning outward fiom the base; antennae extending 

 far behind the thoracic base, blackish throughout, the testaceous 

 basal joint with a black macula; eyes only moderately prominent; 

 prothorax moderately convex, steeply descending to the unusually 

 fine refiexed edge anteriorly, the gutter gradually increasing some- 

 what in width posteriorly, extending to the basal angles, which are 

 tight and sharply defined but not at all prominent; sides rounded, 

 converging and straight posteriorly; apex only feebly sinuate, nar- 

 rower than the base, which is very feebly sinuate from side to side; 

 surface finely, sparsely punctate and with transverse wavy lines, 

 closely punctate throughout basally and especially in the long, ( broadly 

 impressed and unusually deep foveae, which are separated from the 

 sides by a rathei narrow convexity; median stria rather strong and 

 entire; elytra fully one-half longer than wide and only about a sixth 

 wider than the prothorax, parallel, obtuse and strongly sinuate at 

 apex; striae not very fine, deep, the scutellar long and coarse, the 

 intervals flat laterally, slightly convex suturally, all sericeo-opaculate 

 though somewhat shining and with excessively minute suffused and 

 scarcely discoverable punctulation, the puncture at three-fifths 

 distinct; hind tarsi unusually slender, the basal joint barely longer 

 than the fifth. Length (c?) 10.0 mm.; width 3.4 mm. California 



(San Diego), Dunn angustus n. sp. 



Body larger and not quite so slender, though more slender than in cali- 

 fornicus, strongly shining throughout (of), the elytra (9) rather 



