336 Trans. Acad. Set. of St. Louis. 



rufous at tips; third joint of antennae shorter than next two 

 together, flagellum testaceous beneath, abdomen with pale 

 testaceous raarijins broader. Length 5-6 mm. 



Carlmville, Illinois; 13 §, 4 ^ specimens. 



The sexes were taken in copula. In the original descrip- 

 tion specimens of this were mixed with the following. 



Andrena persoxata. 



Andrena ziziae Robertson, XVIII, 55, (^'^, 1891, in part. 



§. — The female of this species is distinguished from that 

 of A. ziziae by the antennae, mandibles and tegulae being 

 darker; the clypeus darker, more convex, bare, reflecting 

 purplish; lateral facial depressions more narrow, inclosure of 

 metathorax more evenly rugose ; second submarginal cell 

 longer, nearly equaling third ; receiving recurrent nervure at, 

 or a little before, the middle ; legs a little darker, abdomen 

 about the same. Length 6-7 mm. 



^. — Resembles the female ; otherwise differs from the male 

 of A. ziziae by having a whitish spot on each side of face, 

 also sometimes wanting, or nearly so ; antennae long, darker 

 above, brownish testaceous beneath, third joint not longer 

 than fourth. Length 5-6 mm. 



Carlinville, Illinois; 19 §, 34 $ specimens. 



Andrena heraclei $• 



Black, thinly clothed with pale pubescence ; face before the 

 ocelli, smooth and shining, finely and sparsely punctured ; 

 lateral depressions of face broad above, at a point about half 

 way between anterior ocellus and antennae strongly narrowed 

 by the encroachment upon it of a smooth and shining portion 

 of the eye margin, the narrow portion being directed a little 

 outward; clypeus shining, closely and coarsely punctured, 

 basal process of labrum subquadrate; mandibles at tips 

 rufous ; third joint of antennae shorter than next two together, 

 flao-ellum more or less dull ferruginous beneath ; mesonotum 

 finely roughened, rather closely and strongly punctured, the 

 disc behind slightly shining and more sparsely punctured, in 

 front the mesonotum presents a deep impressed line, with 

 two short lines on each side ; scutellum shining and more 

 sparsely punctured in front ; metathorax sharply truncate, 



