AMERICAN COLEOPTERA. 137 



California. Rather common from San Francisco south, the 

 localities represented in the material studied being "San Mateo 

 County," Los Gatos, " Los Angeles County," Pomona, Riverside, 

 Pasadena, Kaweah. There is much variation in size, in the promi- 

 nence of the hind angles of the prothorax, and in the development 

 of the mandibular horns of the male. These latter are sometimes 

 not longer than their distance apart, but when fully developed 

 attain the level of the prothorax (the front being vertical) curving 

 outward then inward and approaching one another at tip. The 

 joints of the antennal club are usually a little more elongate in the 

 male, and the last ventral of the female is minutely sparsely granu- 

 late. In view of the great variability observed in cornvtus, I can- 

 not believe that miselhis Lee. is anything more than a very small 

 specimen of this species in which the hind angles of the prothorax 

 are less prominent than usual. It was described from a unique 

 female from San Diego. 



2. O. <l iihius u. sp. — Very closely allied to cormdns, but evidently less stout. 

 a little less shining, slightly more finely punctate and with the pubescence more 

 obvious. These differences are small, but taken together seem sufficient for spe- 

 cific separation. In the types the color is brown, but some smaller examples from 

 the same locality provisionally placed with the types are piceous in color. Length 

 2.4-2.7 mm. 



Williams, Arizona (Barber and Schwarz). One specimen from 



Ouray, Colorado (Wickham) is probably not different. 



3. O. floridamis Lee. — Black, shining; antennje, legs and frequently the 

 head and prothorax rufous ; punctuation fine and sparse, closer on the prothorax ; 

 pubescence very fine, sparse and inconspicuous. Mandibles in the male without 

 horns. Prothorax more strongly transverse than in cornutus, nearly or quite as 

 wide as the elytra, the sides strongly rounded, margin minutely crenulate. hind 

 angles small, obtuse. Beneath densely punctate anteriorly, ventral segments 

 more sparsely so. Length 1.3-2. mm. 



Occurs in the South Atlantic Coast Region. New Jersey (An- 

 glesea), Virginia (Ft. Monroe), Florida (Crescent City and Tampa). 

 With these I have placed a series taken by Mr. Schwarz at Goliad, 

 Texas, which does not differ materially. 



X4RIFA new genus. 

 Labrum very short, arcuate in front, mentum subtrapezoidal ; 

 palpi short, terminal joint largest, ovate, pointed ; antenna; 11-jointed, 

 last three joints enlarged and together nearly or quite as long :i> 



TRANS. AM. ENT. SOC. XXXI. (18) APRIL, 1905. 



