36 Journal New York Entomological Society. [Voi. xvii. 



12. 0. californicus Horn, Proc. Cal. Acad. Sci., V, 1895, p. 224. 



This rare little species may be recognized instantly by its color, 

 which is unique in the genus. The nientum is wider than long, sides 

 parallel, apex a little eniarginate, the lateral angles rounded, surface 

 rather broadly and moderately deeply impressed in front, becoming 

 nearly flat toward the base. The frontal lobe is distinctly margined, 

 the vertex with a short obtuse carina, which is slightly impressed at 

 middle. The type of the species was sent by the writer to Dr. Horn 

 who states that it is a female, the head without ridges and the clypeal 

 margin not reflexed. The three examples before me are perhaps all 

 males, though there is no armature of the legs or other indications of 

 sex. The size varies but little, the length ranging from 4 to 4.5 mm. 

 All examples known to me have been taken either by Dr. Fenyes or 

 the writer, and all occurred flying low over country roads by day, and 

 their behavior and in fact the facies of the beetle strongly suggest 

 Onthophagus. The other species of the genus so far as I am aware 

 fly only at night and are often attracted to lights. Californicus has 

 been taken in April and May at Pomona and Pasadena in southern 

 California, and it, with the anomalous estriatus constitute the only 

 representatives of the genus in the Pacific fauna. 



13. 0. praesidii Bates, Biol. Cent. Am. Coleop., II, pt. 2, p. 106. 



This species is best recognized by the form of the hind tibiae in 

 the male, as indicated in the table. One other species — repandus — 

 possesses this character in a still greater degree, but this latter has a 

 well developed frontal tubercle. In pmsidii the so called upper mar- 

 gin of the frontal lobe is rather widely separated from the true margin, 

 and might be described as a transverse frontal carina which is elevated 

 a little at the middle and at each extremity. There is in some speci- 

 mens a very feeble and obtuse vertical carina which is entirely lacking 

 in others. The mentum is as long as wide, impressed only in front. 

 The hind femora of the male have a strong unciform apical tooth. 

 The females differ according to Schaeffer in having the hind femora 

 and tibiae less broad, and the femoral apical tooth smaller. Occurs 

 in the Huachuca Mts. of Arizona ; I have also a male from New 

 Mexico. 



14. 0. repandus, new species. 



Robust, rufo- or fulvolestaceous, clothed as usual with short erect fulvous hairs. 

 Labrum very feebly emarginate. Mandibles feebly sinuate externally. Mentum as 

 long as wide, narrowed in front, impressed only for a short distance at the apical 



