366 CHARLES ROBERTSON. 



Males. 

 Anterior inferior orbits with a small malar space; clypeus contiguous with eye, 



or nearly ; at least segment 6 with lateral spines 4. 



Anterior inferior orbits with a large subtriangular malar space; clypeus rather 



widely separated from eye 1. 



1. Antennae surpassing thorax, black, joint 3 much shorter than 4; segment 7 



without lateral spines; clypeus yellow or white; labrum white; 



thorax usually pale ochraceous; mp. 6 Synalonia. 



Antennae not surpassing thorax, black above, more or less testaceous beneath ; 

 thorax fulvous; mp. 5 2. 



2. Hind claws long, with a very short inner tooth ; hind metatarsus arcuate, 



its upper apical border beveled, produced below; mandibles at apex 

 bidentate, exterior angle spined ; clypeus trilobed, with transverse 

 apical whitish band ; joint 3 about as long as 4, 5-12 slightly diminish- 

 ing in length; segments 6-7 dentiform with lateral apical angles; 

 labrum and base of mandibles whitish ; 13-17 mm. ; ipomoese in 



Cemolobus. 



Hind claws cleft ; hind metatarsi simple ; clypeus entire. • • 3. 



3. Joint 3 = 4-5; base of mandibles yellow, with an internal tooth ; clypeus and 



labrum largely yellow ; segments 5-6 with lateral basal spines, stronger 



on 6; 14-16 mm.; strenua in Xenoglossa. 



Joint 3 about one-third as long as 4, 5-12 slightly diminishing in length ; man- 

 dibles tridentate, base black ; clypeus with yellow spot; labrum black ; 

 apex of abdomen without spines: 10-12 mm.; pruinosa in 



Peponapis. 



4. Antennae black, not surpassing thorax, joint 3 = 4, 13 longest, curved and 



produced to a point; thorax fulvous; segments 2-4 with narrow sub- 

 apical whitish pubescent fasciae; 5-7 black; 7 without lateral spines; 

 clypeus, labrum and base of mandibles yellow; 14-15 mm.; compta in 



Anthetlon. 



Antennae more or less yellowish or testaceous beneath, usually dark above, 



joint 3 shorter than 4, joint 4 longest 5. 



5. Abdomen with metallic reflections, with four whitish pubescent fasciae, basal 



on segment 2, median on 3, apical or interrupted on 4-5, with a sub- 

 median connection on 4, and sometimes on 5 ; 5 without, 7 with, lat- 

 eral spines; clypeus and middle of labrum yellow; mandibles black; 



mp. 5; 12 mm.; condignus in Florileguw. 



Abdomen without metallic reflections; segment 5 usually with lateral spines; 

 mp. usually 4, sometimes 3, rarely 5 Melissodes. 



SYNALONIA Patton. 



Females. 



Hind spur hooked ; pubescent fasciae white on segments 2-4, more or less fuscous 



on 5, subbasal on 2, submedian on 3; lp. 31 : 11 ; 13-17 mm. 



speciosa. 



Hind spur simple 1. 



1. Vein IVa about one-third before, apex of cell Ills; abdomen black; 14-16 



mm 3. 



Vein IVs about one-fourth before apex of cell Ills ; 12-14 mm. 2. 



