60 MEMOIRS ON THE COLEOPTERA. 



rather coarse; head nearly as long as wide, the eyes well developed, rather 

 convex, only a little shorter and just visibly less prominent than the tempora; 

 antennae fuscous, moderately incrassate, rather short, the outer joints mu- 

 tually similar, transverse, the last obtusely ogival, barely as long as the two 

 preceding, the second longer than the third; prothorax nearly as in ala- 

 medana in form and relationship with the head and elytra, but with the basal 

 angles less evident, the impression obsolete; elytra rather large, shorter than 

 wide, much longer than the prothorax, the apices not sinuate; abdomen 

 rather wide though evidently narrower than the elytra, short, parallel, with 

 feebly arcuate sides, the tergites equal; sterna nearly as in alamedana, ex- 

 cept that the metasternum is much shorter and broader, broadly parabolic; 

 basal joint of the hind tarsi longer, thicker and darker in color than two to 

 four, which are equal. Length 1.6 mm.; width 0.42 mm. California (San 

 Mateo), Baker. 



The general form and coloration of this species is not unlike 

 alamedana, but the tarsi are of peculiar structure and the metaster- 

 nal projection quite different. 



Atheta (Microdota) properans n. sp. Dark and uniform piceous-brown, 

 the abdomen more blackish, alutaceous in lustre, finely and densely punctu- 

 late, the abdomen with the coarse reticulation almost obsolete, its surface 

 polished and with numerous asperulate punctules; pubescence abundant, 

 short, dark ashy; head well developed, rather transverse, broadening basally, 

 the eyes rather convex and less prominent though barely as long as the tem- 

 pora, the carins fine, far from entire; antennae short but rather slender, 

 dark brown, only very feebly incrassate, the outer joints but slightly trans- 

 verse, the last rather obtuse, the second longer than the third, though much 

 shorter than the next two combined; prothorax moderately transverse, 

 much wider than the head and correspondingly much narrower than the 

 elytra, the parallel sides somewhat strongly, evenly arcuate, the basal angles 

 obtuse and blunt but rather evident; basal impression small, rounded, feeble 

 though clearly defined ; elytra moderately transverse, much longer than the 

 prothorax, the apices distinctly sinuate externally; abdomen much narrower 

 than the elytra, feebly narrowing and with nearly straight sides throughout; 

 hind tarsi and sterna nearly as in alamedana but with the basal joint of the 

 former sensibly shorter than the second. Length 1.85 mm.; width 0.42 mm. 

 California (Hydesville, Valley of Eel River, Humboldt Co.). 



Distinct from any of the preceding in lustre, sculpture and 

 sinuation of the elytral apices. 



Atheta (Microdota) repens n. sp. Rather more elongate than any of the 

 preceding, slightly shining, the reticulation fine but distinct, feeble and 

 somewhat transversely disposed on the still more shining abdomen, the 

 punctures very fine, not dense, slightly close and feebly asperulate on the 

 elytra, very sparse and feeble on the abdomen; color blackish-piceous, the 

 head and abdomen black, the elytra a little paler though rather dark piceous, 

 the legs blackish-piceous; head wider than long, parallel, the eyes moderately 

 convex, as long and about as prominent as the tempora, the carinae extending 



