10 U.S. NATIONAL MUSEtIM BULLETIN 290 



or small apical spots, markings frequently reduced or modified, infre- 

 quently absent. Background color of dorsal surface yellowish to orange; 

 usually with seven or eight rows of punctures, two or three rows at 

 side usually confused, infrequently with punctures not forming distinct 

 rows, punctures often larger and/or sparser than usual ; anterior margin 

 of prosternum of male usually with a pointed lobe, that of female often 

 with a lobe; size moderate to rather large. 



The species duryi and binotatus are atypical but are nearer to the 

 Cupressi group than any other. 



Calidus group: albicans Haldeman, aulicus Haldeman, hispinus Suffrian, calidus 

 Suffrian, gibbicollis Haldeman, insertus Haldeman, mutabilis Melsheimer. 



Basic elytral pattern of dark (usually black) markings as follows: 

 from base of second, third, and fourth intervals to apex of second, 

 and on most to all of sixth, seventh, and eighth intervals, pattern 

 often reduced; pronotum predominantly dark, usually with more 

 or less vague, obHque Hght spots at base; with eight, sometimes 

 apparently nine rows of punctures, usually sixth and seventh rows 

 confused, punctures generally smaller, less distinctly impressed than 

 usual; anterior margin of prosternum evenly arcuate in both sexes, 

 infrequently lobed; size moderate to large. 



At first glance, the dark elytral pattern of mutabilis would appear 

 to have little relation to the basic pattern of this group; however, 

 in certain specimens of insertus with reduced lateral vittae and ex- 

 panded inner vittae, the resulting pattern almost exactly matches 

 that of many specimens of mutabilis. In typical specimens of mutabilis, 

 the outer vittae are reduced to spots, and the inner are reduced to 

 two spots each basally but rather expanded before their apices. 



The calidus group is closely allied to the following, and the two 

 could even be united due to the similarity of the basic elytral patterns. 



Venustus group: venustus Fabricius, obsoletus Germar. 



Anterior margin of prosternum of male with a stout spine, that 

 of female with a V-shaped lobe; pronotum predominantly dark, usually 

 with two vague, oblique, light spots at base; each elytron usually, 

 with dark markings from base of second, third, and fourth intervals 

 to apex of second, and on all of sixth, seventh, and eighth intervals; 

 markings may be expanded or reduced; with nine, sometimes ap- 

 parently eight, rows of punctures, often with two or three rows at 

 side confused, reduced, or crowded; punctures generally smaller 

 than usual or more distinctly impressed than usual. 



Cuneatus group: cuneatus Fall, trivittaius Olivier. 



Pronotum with three broad, longitudinal, reddish markings; each 

 elytron at suture and sixth and seventh intervals reddish to black; 



