COLEOPTERA OF SOUTHERN CALIFORNIA. 223 



21. Orus parallelus Casey. 



The species is described from the female and is un- 

 known to the writer. The thorax is described as being 

 nearly as long as the elytra and rather densely punctate; 

 characters which separate it from the following new 

 forms, all of which agree nearly with 0. punctatus in 

 these particulars. 



22. Orus punctatus Casey. 



Male : Posterior margin of fifth ventral with a median lobe which 

 varies somewhat in development, the lobe and posterior half of the seg- 

 ment distinctly longitudinally impressed; sixth segment broadly, deeply 

 emarginate, the sides of the emargination concave, the apex rather nar- 

 rowly rounded; base of segment in front of the emargination rather feebly 

 impressed, the impression more or less covered by the lobe of the fifth 

 segment. 



23. Orus fraternus, sp. nov. 



Male .-Fifth ventral truncate or very broadly, feebly emarginate, feebly 

 impressed; sixth ventral broadly, deeply emarginate, nearly as in 0. punc- 

 tatus, the segment feebly impressed before the emargination. As indi- 

 cated by the series studied, the color is here never so black as in 0. punc- 

 tatus, being rather piceous or brownish piceous; but this difference is not 

 so marked as to enable the positive separation of the females. 



Seven examples from Pomona and San Bernardino. 



24. Orus montanus, sp. nov. 



Male : Fifth ventral broadly, feebly emarginate and very slightly im- 

 pressed; sixth, triangularly emarginate, the emargination much less deep 

 than in 0. punctatus, the sides not at all concave, the apical angle a little 

 less than right, and but slightly rounded. The size is a little larger and 

 the form quite distinctly more robust than in any of the other species 

 here mentioned, the thorax being scarcely at all narrower than the head, 

 as is usual. The color is nearly black. 



Two examples, a male and a female, were taken some 

 years ago in the San Bernardino Mountains, at an ele- 

 vation of 5,000 feet. 



