372 CHARLES ROBERTSON. 



1. Hind knee-plate lanceolate; mandibles tridentate ; cell Ills broader above; 



joint 3 nearly equals 4-7; pubescence griseous and black, fulvous on 

 segments 5-6 ; nip. 2 four or five times as long as 1 ; lp. 32 : 6; 11-13 



mm. ; terminalis in C'lisodon. 



Hind knee-plate circular ; mandibles bidentate 2. 



2. Cell III4 broader above ; joint 3 nearly as long as 4-6 ; thorax and base of 



abdomen, more or less, ocbraceous, elsewhere black; mp. 2 twice as 

 long as 1 ; lp. 28 : 8 ; 12-15 mm. ; abrupta in gen. nov. ; type Anthophora 



abrupta Say Anthemo c ssa. 



Cell III4 not broader above ; mp. 2 about thrice as long as 1 3. 



3. Joint 3 as long as 4-6; segments 1-4 with white fasciae; pubescence ochra- 



ceous, except on legs posteriorly ; lp. 36 : 5; 15-16 mm. ; toalshii in 



Amegilla. 



Joint 3 longer than 4-7; black, ochraceous above on thorax and segment 1; 



lp. 46:8; 15-17 mm.; ursinus in Podalirius. 



Males. 



Middle claw joints simple ; clypeus entirely whitish or yellow '. 2. 



Middle claw joints ciliate; face marks whitish ; clypeus partly black; labium 

 and scape in front whitish ; pygidial process rather distinct, the area 

 indistinct 1- 



1. Joint 3 longer than 4-6; mandibles and abdomen black ; pubescence of head, 



thorax and segment 1 long and griseous or ochraceous, mixed with 

 black on vertex and mesonotum ; middle tarsi fimbriate; 15-16 mm.; 



ursinus in Podalirius. 



Joint 3 hardly longer than 4-5; spot on mandibles and apical margins of seg- 

 ments 1-6 white; 14-15 mm. ; walshii in Amegilla. 



2. Hind metatarsus with a great tooth ; apex of lab rum concave, black tufted ; 



joint 3 about as long as 4-5 ; scape in front, labrum and spot on man- 

 dible yellow; segment 7 without pygidial area or process, apex con- 

 cave, bidentate; pubescence of head, thorax, front legs and base of 

 abdomen mostly ochraceous, elsewhere mostly black; 12-14 mm.; 



abrupta in Anthenioessa. 



Hind metatarsus simple ; labrum entire 3. 



3. Joint 3 longer than 4-5; segment 7 furcate; labrum yellow; mandibles and 



scape usually black; pubescence griseous, mixed with black above; 



10-11 mm.; terminalis in Clisodon. 



Joint 3 little longer than 4; pygidial area shining; labrum, mandibles and 

 scape black ; ochraceous above on thorax and segment 1 ; floridana in 



'Emphoropsis. 



