30 PROCEEDINGS OF THE NATIONAL MUSEUM vol. lu 



examined by Howden. About 20 of the specimens seen apparently 

 were collected in 1920 by H. H. Kimball at Paradise, Ariz.; 41 were 

 collected in wood rat nests at Portal, Ariz., in September 1960 by 

 Howden. The writers found a few specimens and fragments a mile 

 east of Portal in wood rat nests in late June 1956. The Arizona spec- 

 imens are almost identical with Horn's Kansas specimens except 

 that the eyes are narrower and the specimens appear darker, with only 

 occasional traces of greenish lustre on the head of a female. 



Although no recently collected specimens from Kansas have been 

 seen, the Kansas label of the type series (collected by Dr. H. A. 

 Brons) should be accepted because at least two species of wood rats 

 occur in the state. 



The unconnected distribution can at present be explained only 

 by the seemingly restricted habits of 0. brevifrons, the only biological 

 information being that they occur in the soil under the large stick 

 nests of the wood rats (Neotoma species). 



Onthophagus siibtropicus, new species 



Plate 2, Figures 8 and 11 



HoLOTYPE. — Male, length 8 nmi., width 4.5 mm. Head and pro- 

 notum shining, dark blackish green; elytra black, alutaceous, weakly 

 shining. Clypeus arcuate, margin moderately reflexed over anterior 

 half; disc densely, shallowly, moderately punctate, with some anas- 

 tomosing and tendency to rugosity near edges; clypeal carina rather 

 high and distinct over middle third of a raised area between the 

 interior ends of the distinctly carinate sutures between clypeus and 

 genae. Frons closely, moderately punctate, a few coarser punctures 

 laterally near the frontal carina; frontal carina moderately high, 

 strongly sinuate, the middle and ends arcuate posteriorly and not as 

 high at middle as near the ends; somewhat finer punctures behind the 

 frontal suture, separated 1 diameter or less, otherwise minutely alu- 

 taeous. Genae widely rounded, margin joining clypeus without a 

 break, surface closely coarsely punctate. Eyes wider than in brevi- 

 frons, two-fifths as wide as long, about 7 facets wide. 



Pronotum margined anteriorly and laterally, basally very finely 

 so for a short distance at middle; disc very convex, high in front 

 with a broad vertical concavity on each side; upper edges of the 

 concavities sharp, almost carmifonii for a short distance; anterior 

 angles not sharply rounded; surface of disc everywhere with close, 

 mixed, moderately coarse and fine punctures, the coarse punctures 

 separated by a diameter or more, the fine punctures everywhere in 

 between; surface otherwise smooth and shining except for alutaceous 

 sculpture narrowly across the base. Elytra strongly alutaceous, 



