76 PROCEEDINGS OF THE NATIONAL MUSEUM vol. ii4 



Between that date and July 9, seventy specimens were collected under rabbit 

 droppings in the same place; twenty-seven being taken on July 4. In 1927, 

 fifty were collected in the same locality, all within an area one-eighth mile in 

 diameter. The best days were July 20 and 21, on each of which twelve of the 

 beetles were collected. All specimens were taken at rabbit pellets. Thus two 

 seasons' collecting resulted in 120 specimens. The beetles were most active 

 on warm sunny daj'S after showers, and practically all were found between 9 

 A.M. and noon. None was ever observed on the wing in the afternoon or on 

 a cloudy morning. As in all species of Onthophagus whose habits are known 

 to me, cribricollis buries its food where found and sinks it vertically to a depth 

 of a few inches, where the subsequent grub lives in a double walled plaster cell 

 of its own manufacture. The entire metamorphosis was found to require about 

 one month. As in other species, this beetle probably overwinters as a hibernating 

 adult buried singly at a depth of several inches. 



It seems odd that the name suhaeneus (PaKsot de Beauvois) could 

 ever have been used for the species at times called 0. protensus 

 ]Melsheimer and here recognized as 0. concinnus Laporte. The 

 original description of suhaeneus (Palisot de Beauvois) details several 

 major differences, and the illustration is completely at variance with 

 concinnus Laporte. The latter is a larger, brightly shining, bicolored 

 green and yellow, strongly tuberctilate species having in the male a 

 flat, somewhat bifurcate pronotal projection and median upturned 

 clypeal process, whereas suhaeneus (Palisot de Beauvois) is punctate, 

 unicolorous, moderately shining, black with cupreous or greenish 

 cast, and has in the male a short conical pronotal protuberance and 

 bidentate clypeus. The illustration accompanying the original de- 

 scription of suhaeneus shows a figiure with bidentate clypeus and 

 no evidence of bicolored elytra. The size of the species is indicated 

 and measures 4 mm. 



Onthophagus knausi Brown 



Plate 6, Figures 56 and 57 



Onthophagus knausi Brown, 1927, p. 130. — Boucomont, 1932, jd. 312. — Leng 



and Mutchler, 1933, p. 38. 

 Onthophagus anthracinus Dawson, p. 73 (not Harold, 1873, p. 911). 



Male majors. — Length 4.3 to 4.9 mm., width 2.4 to 2.6 mm. 

 Black, moderately shining, sometimes with cupreous reflections on 

 head and pronotum; elytra opaque to weakly shining; ventral surfaces 

 piceous, legs usually slightly lighter in color. Head with clypeus 

 sharply reflexed anteriorly, poorly so laterally, reflexed portion dis- 

 tinctly emarginate, angulate laterally, giving clypeus a bidentate 

 appearance; disc of clypeus flat with scattered coarse setigerous 

 punctures, clypeal carina absent, posterior portion of clypeus and 

 anterior of frons slightly tumid, frons finely alutaceous and coarsely, 

 moderately punctate; vertex lacking carina, alutaceous with scattered 



