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BULLETIN: MUSEUM OF COMPARATIVE ZOOLOGY. 
Body opaque, distinctly shagreened. . rufibarbis var. clara Forel. 
Body subopaque, lustrous, finely shagreened. 
rufibarbis var. caucasica Ruzsky. 
Erect hairs yellow: pubescence of gaster without silky luster. 
rufibarbis Fabricius. 
Erect hairs whitish, pubescence on gaster longer............. 11 
Gaster with a bluish tinge........ rufibarbis var. glauca Ruzsky. 
Gaster gray, red of body somewhat paler. 
rufibarbis var. subpilosa Ruzsky. 
Length 3-6.5 mm. Epinotum angular in profile, body slender. 
fusca picea Nylander and its var. gagatoides Ruzsky. 
Length 5-7.5 mm. Epinotum rounded in profile, body stout. 
gagates Latreille and its var. fuscogagates Forel. 
Body slender, thorax long, with very long, shallow, saddle- 
shaped mesoépinotal constriction............. subrufa Roger. 
Body stouter, thorax of the usual shape... ......55. 22am 14 
Body dark brown or blackish. 
cinerea Mayr and its vars. fuscocinerea Forel 
and armeniaca Ruzsky. 
Body light reddish brown.......... cinerea var. umitans Ruzsky. 
Gulawithouterect hairs. ..........20.. 5.04. 2 eee 16 
Gulatwithierect hairs?) 6.02.2... eee 26 
Gaster opaque or subopaque, densely pubescent............. he 
Gaster more shining, very sparsely pubescent.............. 24 
Thorax black orwery dark brown... 08)! 7 eee. eee 18 
Thoraxigrmely red ei ee eee 21 
Pubescence on gaster short, not silky............ fusca Linné. 
Pubescence on gaster longer, denser and silky............... 19 
Body black, pubescence not silvery. .fusca var. subsericea Say. 
Body cdamlemurowntee.. 0... Oe, See 20 
Pubescence on body not silvery, sutures of thorax reddish or 
VENOWwseMe eee fusca var. marcida, var. nov. 
Pubescence on body somewhat longer, denser, and silvery. 
fusca var. argentea Wheeler. 
Gaster black or blackish brown; epinotum angular in profile. . .23 
Gaster reddish brown, paler, epinotum rounded in profile. . . .22 
Gaster more or less infuscated above; length 3-6 mm. 
fusca var. neoclara Emery. 
Gaster not infuscated above, length 3-3.5 mm. 
fusca var. blanda, var. nov. 
Length 4-7.5 mm.; gaster opaque, with long, dense pubescence. 
rufibarbis var. occidua Wheeler. 
