1873.] dUd [Horn. 



by a sinuous elevated Hue. Propygidium transversely hexagonal, moder- 

 ately shining, coarsely punctured, pygidivini elongate oval, intlcxed, more 

 finely punctured than the propygidium and more shining. Length .16 

 inch ; 4 mm. 



One specimen. Fort Tejon, California. 



O. alternatiis, Say. Journ. Acad., 1:)24, p. 46 ; Lee. Bost. .Journ. V., 

 p. 83, pi. 6, fig. 9 ; var. pluricostaius, Lee. 1. c, p. 81 ; var. nodatus, Lee. 

 1. c, p. 83 ; Mars. Mon., 1850, p. 558, pi. 11, No. 40, fig. 4 {alternatus) ; 

 1. c. p. 556, fig. 3 {iwdatus). 



Broadly oval, very convex above, surface either moderately shining or 

 opaque. Head with strong V-shaped carina, vertex slightly concave 

 with short acute carina. Thorax tv^ice as wide as long, disc coarsely 

 punctured margins slightly reflexed, sides strongly arcuate, disc with 

 six carinas, the middle four entire, equidistant and slightly convergent 

 to apex, outer carinaj short basal. Elytra carinate, carinas variable in 

 size. Epipleur£e coarsely foveatato-punctate. Propygidium coarsely 

 punctate, with three longitudinal carinjE, the median entire, the lateral 

 stiort. Pygidium coarsely punctured with two semicircular elevated 

 lines at base and a longitudinal short carina at apex. Body beneath 

 very coarsely punctate. 



Var nodatus, Lee. Thorax with the sides more strongly arcuate. 

 Elytra with three entire dorsal and a marginal, costse ; intervals finely 

 5-carinulate, the third carinula slightly stronger, 2 and 4 interrupted by 

 distant punctures. Length .10-.12 inch ; 2.5-3 mm. 



Var. alternatus, Say. Surface more shining, thorax with sides less 

 arcuate, third carinula stronger. Length .08 inch ; 2 mm. 



Var. 'pluricostatus, Lee. Resembles alternatus, but less shining. 

 Third carinula equal to the main carina. Length .08-. 10 inch ; 2-2.5 

 mm. 



I find it impossible with the series of specimens before me to separate, 

 other than as varieties, the species above noted. 



Occurs from Massachusetts to Georgia, but rare. 



Het.^ritjS, Erichs. 



Anterior angles of thorax dilated. 



Legs, especially the posterior long morsus. 



Anterior angles not dilated, thorax arcuately narrowed from 

 base to apex. 

 Lateral thickened margin of thorax with a transverse 



sulcus brunnipennis. 



Lateral thickened margin notched slightly behind the 



middle californicus. 



H. morsus, Lee. Proc. Acad., 1859, p. 70 ; Horn, Trans. Am. Ent. 

 Soc, 1870, pi. 1, fig. 6. 

 Ferruginous brown, feebly shining, very sparsely clothed with very 



