THE ANT-LOVING BEETLES. 325 



c. Frontal margin produced l)ey(jnd the line between tbe bases of an- 

 tennae. 

 (I. Vertex more or less scabvons <.r mugbened and carinate. 



e. Vertex vaulted or elevated, feebly scabrous; Inst anteuual joint 



of male loug, with an erect tootb; elytra punctate, tbe sboul- 



ders not angnlate ; lengtb 1.5 mm. G17. kiparius. 



cc. Xevtfx not vaulted, c(^arsely scabrous; last autennal .joint of 



male without a tooth; length 2.2 mm. i 



;'. Fovea' of occiput not pubescent ; frontal margin of male 



notched in middle; shoulders angnlate. scabriceps. 



/'/. Fdvea' of orci]iut piiliescent; head very flat; frontal margin 



triangular; thorax with conspicuous dis(/al crests and deeii 



grooves, so that Ihe disk ai)iiears to l)e marked with five 



lines. lANEATicor.i.iM. 



(Id. A'ei'tcx smooth ; front more or less elevated. 



,(/. Antenna' alilvo in tlie sexes; foveie of occiput pubescent; ver- 

 tex not carinate. 

 li. Thorax without crests or sjiines; sulcus of vertex deep; ely- 

 tra not punctate; length 2.2 mm. pkontalis. 

 lili. Thorax with four basal spines; sulcus of vertex shallow; 

 elytra very finely and sparsely punctate; length 1.!) mm. 



SIMPLEX. 



gg. Antennae unlike in the sexes, tbe tenth .joint in male globose 

 and very large; in female but one-half thicker than ninth; 

 fovese of occiput not pubescent; vertex carinate; length 

 1.7 mm. 618. globosus. 



cc. Frontal margin not produced beyond the line between the bases of 

 antennae; tenth antenual joint of male very large. 

 /. Humeri blunt, rounded ; fove;e of occiput not pubescent. 

 j. Reddish-brown ; tenth joint in male with a small fovea at the 

 base; length 2 una. 610. viegini.e. 



/;. Black or piceous; antennie and legs red; tenth joint foveate 

 on under side. , 



7i. Median sulcus of thorax obsolete; length 1.6 mm. 



020. SI'BETIS. 



II-. JXedian sulcus present; fovea> on under surface of tenth 

 joint very large. 621. fovkicoknis. 



)'/. Humeri spinous; fovea of occiput laibcsceut; length 2 mm. 



/. Piasal joint of male antenmc bluntly toothed lielow. teulh joint 

 large, with a small, round, deeii puncture at b.-ise on under 

 side. jiK>iTrcoLLis. 



//. Basal joint not toothed below ; tenth joint not punctate be- 

 neath ; black, with reddish antennje and legs. 

 m. El.vtra smooth, vertex not jamctate; third jiiut of male an- 

 tenna' longer than second or foui'tli and sw(dlen on one 

 side. 622. xKiRiOANs. 



;;()//. Kl.\ira indistinctly puiiclale; vei'tex with a central trans- 

 verse punctui'e ; three l)asal joints of imtennai subequallj' 

 decreasing in size. striatus. 



