522 PROCEEDINGS OF THE NATIONAL MXTSEUM vol. los 



9. Coarse punctures of all elytral intervals similar, shallow and indistinct to mod- 

 erately deep; apex of prosternal process divided by a distinct groove, the 

 anterior part nude, smooth and convex, the posterior part hairy; frontal 

 rugae appearing as sharply delimited ridges on a flat surface; Arizona, 



Mexico selanderi, new species 



Coarse punctures of all elytral intervals deep and distinct; prosternal process 

 not divided, the nude apex with uneven surface, the long coarse hairs in- 

 vading the nude area from back and sides; frontal rugae sharply delimited 

 only on posterior side, not delimited anteriorly; North Carolina to Florida 

 to Alabama subtropicus (Blatchley) 



Bothynus gibbosiis gibbosus (DeGeer) 



Srarabaeus gibbosus DeGeer, 1774, p. 322. 

 Geotrupes jiivencus Fabricius, 1775, p. 32. 

 Podalgus variolosus Burmcister, 1847, p. 121. 

 Podalgus juvencus Burmeister, 1847, p. 121. 

 Ligyrus juvencus Burmeister, 1847, p. 542. 

 Ligyrus gibbosus LeConte, 1856, p. 20. 

 Ligyrus parallehis Casey, 1915, p. 194. 

 Ligyrus puncticauda Casey, 1915, p. 195. 

 Ligyrus texanus Casey, 1915, p. 195. 

 Ligyrus breviusculus Casey, 1915, p. 196. 

 Ligyrus lacustris Casey, 1915, p. 196. 

 Ligyrus laticauda Casey, 1915, p. 197. 

 Ligyrus laetulus Casey, 1915, p. 197. 

 Ligyrus bicorniculaius Casey, 1915, p. 198. 

 Ligyrus rubidus Casey, 1915, p. 198. 

 Ligyrus curlipennis Casey, 1915, p. 199. 

 Ligyrus lucublandus Casey, 1915, p. 199. 

 Ligyrus farctus Casey, 1915, p. 200. 



Length 10 to 17 mm., width 6 to 11 mm. Oblong-oval, convex, 

 shining, reddish brown. Clypeus apically bidcntate, the teeth sep- 

 arated by their basal width, surface finely rugiilose, a few coarse 

 shallow punctures along edge of the frontal carina which is thin, 

 sometimes feebly sinuate at middle and not reaching sides. Front 

 rugose anteriorly, a few coarse punctures above the eyes and across 

 the middle, base otherwise smooth. Pronotum convex, anterior 

 angles acute, a httle less than right angled, posterior angles rounded, 

 sides finely margined, subparallel over basal half, strongly" converg- 

 ing anteriorly, base not margined, sinuate, anterior median tubercle 

 moderate, the depression or pit behind it moderately deep and dis- 

 tinct, its length from one-fourth to one-third the thoracic length, 

 surface moderately coarsely punctate throughout, the punctures sep- 

 arated by from one to three times their diametei-s, those near and in 

 the anterior depression slightly smaller. Scutellum smooth or with 

 a few punctures. Elytra a little longer than wide, about twice as 

 long as the pronotum; very fine punctures scattered throughout and 

 mixed with coarse, deep and usually distinctly annular punctures, 



