92 GEO. H. HORN, M. D. 



feebly so. In two species the posterior tibiae have but one spur, 

 a fact which seemed at first doubtful but verified by an examination 

 of about a dozen specimens. 



The elytra present two types of sculpture, punctuation and trans- 

 versely strigose and the striae are variable in the former type but 

 quite constantly present in the latter. 



The above characters reduced to tabular form give the following 

 arrangement of our species. 



Elytra punctured. Posterior tibise with two spurs 2. 



Elytra transversely strigose 3. 



2. — Punctuation rather coarse. 



Body feebly convex, not more so than in Cyphon inruiuatus. 



Body ovate convex. 



Elytra substriate especially near the tip OTiforiiiis. 



Elytra without striae except the sutural testaceus* 



Punctuation dense and rather fine, elytra with the sutural stria only. 



punctulatus. 



3. — Posterior tibife with two spurs uiorio. 



Posterior tibise with one long spur. (PL I, fig. 7 a). 



Strigoe of elytra closely approximated, the tip ferruginous. ..termiiialis. 

 Strigse of elytra distant, the surface more shining, the tip not fer- 

 ruginous strigosus. 



The European E. hsemorrhous is closely allied to termhialis, but ia 

 more obtuse in front and has the rufous spot at the tip of the elytra 

 better limited, it has like the last two species in the table a single 

 spur at the tip of the posterior tibia. 



E. infumatus Lee. — Elongate oval, feebly convex, scarcely narrowed 

 behind, piceous, moderately shining, clothed with short brown pubescence. 

 Head and thorax finely sparsely punctate. Elytra moderately densely punc- 

 tate, and with the sutural stria alone, which extends from apex to middle 

 and gradually disappears. Body beneath finely and moderately densely punc- 

 tate. Legs ferruginous. Three basal joints of autennce pale. Length .16 inch ; 

 4 mm. 



In the females the sixth abdominal segment is hardly visible. The 

 posterior tibiae have two terminal spurs. 



This insect has a form not unlike that of certain Hydroporus, 

 €. ff. tenthrosus, etc. 



Occurs near San Francisco, under bark, in February. 



E. oviformis Lee. — Ovate, convex, narrower posteriorly, piceous or nearly 

 black, sparsely clothed with short brownish pubescence. Head and thorax 

 Very sparsely punctulate. Elytra moderately densely punctate and near the 

 apex substriate. Body beneath finely, not densely punctulate. Autenuse and 

 legs paler. Length .16 inch; 4 mm. 



More convex than the preceding with the elytra substriate and 



