Robertson — North American Bees. 835 



Andrena scdtellata D. T. 



Andrena scutellaris Robertson, Trans. Am. Ent. Soc. XX, 148, 1893 (nee 



Morawitz). 

 Andrena scutellata Dalla Torre, Cat. Hym. X, 161, 1896. 



Andrena bipunctata Cress. 



Andrena bipunctata Cresson, IV, 259, J^, 1872. 



Andrena Jlavoclypeata Smith, New Spec. Hym. Brit. Mus., 64, (^ 1879. 



Andrena Jlavoclypeata Robertson, XVIII, 55, 1891. 



The female closely resembles the male and may be readily 

 distinguished from allied species by its clypeus being smooth, 

 shilling and impunctate except on the sides. 



Through the kindness of Mr. Cresson I have had an oppor- 

 tunity to examine the Texan examples. In the place last 

 cited I indicated the synonymy of the two names, but 

 Cressou's name has the priority. 



Andrena ziziae Rob. 



Andrena ziziae Robertson, XVIII, 55, cf ?, 1891, in part. 



5. — Black, with an obscure greenish reflection, thinly 

 clothed with pale pubescence ; head wider than thorax, finely 

 striate before ocelli; clypeus sometimes dull ferruginous, 

 finely roughened, with sparse, rather coarse, shallow punc- 

 tures, clothed with thin pubescence; basal process of labrum 

 small, narrow, mandibles honey yellow in middle, rufo-picens 

 at tip ; third joint of antennae as long as next two together, 

 or nearly so; flagellum testaceous beneath; lateral depres- 

 sions of face wide ; thorax very thinly clothed with pale 

 pubescence, very sparsely and feebly punctured, finely rough- 

 ened ; inclosure of metathorax wide, rather strongly rogose 

 at base; wings long, yellowish hyaline, nervures, stigma and 

 tegulae testaceous, second submarginal cell half as long as 

 third, or a little wider, receiving recurrent nervure beyond 

 middle ; legs blackish or dull ferruginous, often inclining to 

 yellowish ; abdomen depressed, impunctate, finely roughened, 

 with an obscure greenish reflection, apical margins of seg- 

 ments pale testaceous, 2-4 with apical fasciae of thin pale 

 pubescence, anal fimbria dirty white. Length 6-7 mm. 



^. — Resembles the female, a little less greenish; clypeus 

 whitish, with a blackish spot on each side, with thin whitish 

 pubescence, basal process of labrum emarginate, mandibles 



