200 PROCEEDINGS OF THE NATIONAL MUSEUM vol. i04 



Descriptions have been based where possible on specimens believed 

 to be normally well developed. 



Larvae: Known larvae may be distinguished by the following 

 characteristics: Body slightly bent without enlarged abdomen; legs 

 3-segmented with claws, metathoracic legs not reduced; paired 

 ventral anal lobes; galea not emarginate; penultimate segment of 

 antenna with more than two (usually four) conical sense organs. 



The genus is represented by three species and one subspecies in 

 North America, one known species in South America, and one in 

 Australia. 



Key to the North American species of Eucanthus 



1. Surface of head, pronotum, and elytron smooth, not granulate, giving shining 



brown or black color 2 



Surface of head, pronotum, and elytron finely granulate, giving an oily dark 

 brown color (Gulf Coast States) alutaceus Cartwright 



2. Pronotum noticeably explanate; transverse pronotal carina pronounced; tu- 



bercle at humeral angle present, usually quite pronounced (subspecies of 



lazarus) 3 



Pronotum only slightly explanate; transverse pronotal carina not pronounced; 

 tubercle at humeral angles of elytra absent or vaguely indicated (South- 

 western States) greeni Robinson 



3. Color brown to dark brown, antennal club large, at least slightly longer than 



eye (pi. 2, fig. 7) ; 2nd and 4th elytral intervals slightly wider than adjacent 

 ones and usually with a medial row of very fine punctures (pi. 2, fig. 9) ; 



punctures of elytral striae shallow lazarus lazarus (Fabricius) 



Color dark brown to black, antennal club small, slightly shorter than eye 

 (pi. 2, fig. 6) ; 1st, 2nd, 3rd, and 4th elytral intervals approximately the same 

 width and lacking any supplementary row of small punctures (pi. 2, fig. 8), 

 strial punctures deep, those of third stria (and others) almost confluent 

 (Florida, Alabama, north toJ_Northj^Carolina). 



lazarus subtropicus, new subspecies. 



Key to the known larvae of North American species of Eucanthu8 



Glossa not constricted behind base of palpi, setae limited to lateral portions 

 near the base of the palpi lazarus lazarus 



Glossa (pi. 6, fig. 6) constricted behind base of palpi, setae extending entirely 

 across anterior lazarus subtropicus 



Eucanthus lazarus (Fabricius) 



Scarabaeus lazarus Fabricius, 1775, p. 11; 1781, p. 11, No. 34; 1787, p. 5, No. 



25; 1801, p. 23, No. 5.— Jablonsky, 1785, p. 276, No. 38.— Olivier, 1789, 



genus 3, p. 63. — Panzer, 1794, p. 2, No. 4. 

 Bolboceras lazarus (Fabricius) Castlenau, 1840, p. 105, No. 11. — Klug, 1845, pp. 



51-52.— Horn, 1870, p. 49.— Schaeffer, 1906, p. 253.— Blatchley, 1910, p. 937. 

 Eucanthus lazarus (Fabricius) Westwood, 1852b, p. 26. — Manee, 1908b, p. 459. — 



Boucomont, 1911, p. 336.— Dawson, 1922, p. 195.— Blatchley, 1928, p. 30.— 



Ritcher, 1947, p. 10. 

 Scarabaeus meliboeus Fabricius, 1775, p. 20. 

 Eucanthus meliboeus (Fabricius) Westwood, 1848, p. 387; 1852, p. 26. 



