THE CANADIAN ENTOMOLOGIST. 287 



7. Middle and hind femora red ; mandibles, labrum, antennae and tegulte 

 black ; pleura with an L-shaped mark ; lo-i i mm .... helianthi. 

 Middle and hind femora more or less black ; mandibles, labrum, base 

 of antennae and tegula; red ; rarely entirely black ; pleura 

 commonly covered with pubescence ; fasciae usually interrupted ; 

 8-1 1 mm Cressonii. 



Epeolus, Latreille. 

 Females. 



Front with a large tubercle on each side ; mesonotum not bilineate ; 

 middle of segment i and apex of 2 with golden fascite ; mandibles 

 with an internal tooth ; head and thorax coarsely, abdomen finely 

 punctured ; pectus with coarse, sparse punctures ; labrum, joints 

 1-3, collar, tubercles, line above, tegulse, scutel and axilla3 red ; 

 spurs black ; wings fuliginous ; stigma rather large ; 

 7-9 mm bifasciatus. 



Front simple; mesonotum bilineate; border of segment i, apical 

 margins of 2-4. and lateral patches on 5 of pale pubescence. . . . i. 



1. Pleura below finely and closely punctured ; scutel low ; transverse, 



opaque ; mandibles simple or with an indistinct internal tooth ; 



fasciie continuous or nearly so • • • 3- 



Pleura below coarsely and sparsely punctured ; sculel bilobed, shining; 

 fasci?e interrupted, that on sides of 2 projecting forward; abdomen 

 finely punctured; tubercles, axillary spines and spurs more or less 

 red 2. 



2. Thorax coarsely, rather sparsely, punctured; mandibles simple ; fasciae 



cinereous, pointed on the disc ; silvery lunule subtriangular ; 



joints 1-3 more or less red ; 9 mm lectoides. 



Thorax rather finely and closely punctured ; mandibles with an 

 internal tooth ; fasciae club-shaped on the disc ; silvery lunule 

 transverse ; joints 1-3 red ; scutel usually more or less red ; 

 7-9 mm interruptus. 



3. Scutel quite surpassing lateral spines ; spurs red ; lateral patches of 



segment 5 separate ; femora more or less black ; 



9-1 1 mm autumnalis. 



Scutel hardly surpassing lateral spines ; spurs black ; lateral patches of 

 segment 5 connected across the disc; femora red ; 

 7-8 mm pusillus. 



