NATURAL SCIENCES OF PHILADELPHIA. 353 



72. Helops B a c h e i, elongatus, nigro-piceus, senescens, capite tlioraceque 

 dense fortiter aciculatim punctatis, hoc parum convexo, latitudine paulo bie- 

 viore, rotundato, ante basin vage arcuatim impresso, elytris striato- punctatis, 

 interstitiis planis disperse subtiliter punctatis postice tuberculis minutis 

 punctigeris uniseriatim ornatis, metasterno brevi. Long. "34 "50. 



Island of Santa Barbara, Mr. C. M. Bacbe. Very distinct from all the other 

 species known to me ; the small tubercles of the elytral intervals in large 

 specimens may be seen almost to the base, in small ones, however, they are 

 sometimes almost entirely wanting, and may be traced only very near the tip. 

 Each little elevation is marked with a point somewhat larger than the scat- 

 tered punctures of the intervals. The antennae are slender, very slightly 

 thickened externally. The under surface of the prothorax is densely acicu- 

 late ; the metasternum is strongly, the abdomen more finely punctured. The 

 male has three joints of the anterior tarsi moderately, and of the middle tarsi 

 very slightly dilated. 



73. Helops pernitens, nigro-seneus nitidissimus, subtus nigrio-piceus, 

 capite confertim punctato, thorace latitudine plus sesqui breviore, antice pos- 

 ticeque truncato, lateribus rotundatis, margine fortius depresso et reflexo 

 postice haud latiore, disperse punctato, elytris oblongo-ovalibus convexis, 

 fortiter marginatis, striis profundis subpunctatis, interstitiis planis vix punc- 

 tulatis, metasterno brevi. Long. - 40. 



Oregon. Related to H. 1 set us Lee, but differs by the thorax being less 

 densely punctured, and by the posterior angles being much more obtuse ; the 

 sides curve equally before and behind the middle, and the depressed margin 

 is not wider at the base. The sides of the prothorax are finely and densely 

 striate beneath ; the metasternum is strongly punctured ; the abdomen is 

 more finely punctured, and is rugous at the sides. Three joints of the ante- 

 rior tarsi are moderately, of the middle tarsi very slightly dilated in the male. 



74. Helops convexulus, nigro-piceus, senescens, capite confertim, tho- 

 race sat dense punctato, hoc convexo latitudine paulo breviore, antice posti- 

 ceque truncato, lateribus rotundatis, angulis obtusis rotundatis, elytris ovali- 

 bus, convexis, striis subtilibus punctatis, interstitiis planis, pedibusrufo-piceis. 

 Long. *24. 



Bitter Root Valley, Rocky Mountains. Lieut. Mullan's Expedition. The 

 sides of the presternum beneath are densely striate ; the rest of the under 

 surface is punctured, and the sides of the abdomen are besides finely rugous. 



75. Cibdelis B a c h e i, niger opacus, thorace latitudine vix breviore, antice 

 magis angustato, lateribus rotundatis postice subsinuatis, angulis posticis 

 rectis, parum convexo, tuberculis parvis scabro, elytris lateribus rotundatis, 

 thorace sesqui latioribus, striis subtilibus punctatis, interstitiis tuberculis 

 parvis dispersis. Long. *65. 



Island of Santa Barbara, California; Mr. C. M. Bache, to whom I take great 

 pleasure in dedicating this fine species, as a slight acknowledgment for the 

 labor bestowed in making collections on the islands near the coast of Cali- 

 fornia. 



Larger and broader than C. Blaschkii, and totally distinct in its sculp- 

 ture. The epistoma is broadly emarginate and nearly conceals the labrum, 

 while in C. B 1 a s c h k i i it is truncate, and the labrum is more prominent ; 

 the mentum is broader in front, and feebly emarginate, and the hind feet are 

 more widely separated. I am not disposed to regard these differences as ge- 

 neric. 



76. Uloma 1 o n g u 1 a, piceo-rufa, elongata, nitida, capite confertim subtili- 

 ter punctato, fronte late et profunde transversim impressa, thorace latitudine 

 breviore, antice paulo angustato, lateribus anguste marginatis, sat dense 

 medio subtilius punctato, elytris striis haud profunde punctatis, interstitiis 

 planis obsolete punctulatis. Long. -37. 



1861.] 



