166 PROCEEDINGS OF THE NATIONAL MUSEUM vol.104 



12. Lateral lobes of genital capsule of male deflexed at apices to form hooks; 

 in the female the distal black area of elytron is usually confluent only with 

 sutural stripe and not with the black marginal stripe; general form often 



somewhat elongate (Georgia and Florida) hamatum Brown 



Lateral lobes of genital capsule of male elongate, not deflexed; in the female 

 the distal black area is usually confluent with both sutural stripe and black 

 marginal stripe; general form oval farctum (Fabricius) 



To my knowledge, only two larvae in this genus have been collected. 

 One larva was described by Kitcher (1947, pp. 11, 12) and tentatively 

 identified as tumefactum. The second, procured by Ritcher and myself, 

 is the larva oi jarctum. The two larvae are so close morphologically 

 that I doubt that there is a specific difference. 



If the larvae do represent two species, they may be separated by 

 the following characteristic of doubtful constancy. 



Labrum broadly rounded tumefactum 



Labrum truncate (pi. 6, fig. 4) farctum 



Bolbocerosoma farctum (Fabricius) 



Scarabaeus fardus Fabricius, 1775, p. 14, No. 43; 1781, p. 14, No. 53; 1787, p. 7, 

 No. 56; 1792, p. 22, No. 65.— Herbst, 1789, p. 112, No. 80.— Panzer, 1794, 

 p. 3, No. 8. 



Geotrupes farctus (Fabricius) Fabricius, 1798, p. 21, No. 58. 



Bolhoceras farctus (Fabricius) Kirby, 1818, p. 460. — Klug, 1845, p. 51. 



Bolbocerosoma farctum (Fabricius) SchaefTer, 1906, p. 254. — Boucomont, 1911, 

 p. 341.— Dawson and McColloch, 1924, p. 10.— Blatchley, 1928, p. 29 

 (probably referable to hamatum). — Brown, 1928, p. 193. 



Scarabaeus cephus Fabricius, 1775, p. 18, No. 64; 1781, p. 19, No. 78; 1787, p. 10, 

 No. 85.— Herbst, 1789, p. 286, No. 177.— Olivier, 1789, genus 3, p. 68.— 

 Palisot de Beauvois, 1805, p. 90, pi. 2b, fig. 5.— Klug, 1845, p. 51. 



Length 9 to 13 mm., greatest width 7 to 8 mm. 



Dorsum yellow-brown to red-brown, marked with black as follows 

 in male: Eye, vertex, tip of horn, tip of clypeus and eye canthus, 

 transverse pronotal carina, lateral limiting grooves, apical pronotal 

 margin between lateral carinae, band on pronotal base extending 

 laterally no farther than elytra! margin, scutellum, sutural intervals, 

 extreme base of elytron, elytral margins, and entu'e posterior half of 

 elytron forward to subapical umbone. Black area may not extend 

 to subapical umbone in some cases, nor completely suffuse entire 

 posterior portion of elj^tron, leaving a blacldsh brown area adjacent to 

 the black margm. Female marked as male; in a few cases the black 

 area of the vague lateral limiting grooves absent. In both sexes 

 ventral portion of head and thorax is yellow to red-brown, with abdo- 

 men blackish brown. Foretibia fringed with black. Vortex coarsely, 

 sparsely punctured; punctures of clypeus irregular, dense, and some- 

 times confluent. Pronotum coarsely, irregularly punctate medially, 

 posterior black area impunctate, lateral portion more finely, closely 



