Robertson — North American Bees. 847 



OsMiA Panz. 



OSMIA ATRIVENTRI8 CrCSS. 



Osmia atriventris CressoD, Proc. Ent. Soc. Phil. III. 29, 9> 1864. 

 Osmia proxima Cresson, Proc. Eat. Soc. Phil. Ill, 32, (^^ 1864. 

 Brit. Am., U. S. (Cress.). 



Osmia conjuncta Cress. 



Osmia conjuncta Cresson, Proc. Ent. Soc. Phil. Ill, 31, ?, 1864. 



Osmia 4-dentata Cresson, Trans, Am. Ent. Soc. VII, 107, cf, 1878. 



Osmia cressonii Dalla Torre, Cat. Hym. X, 392, J^, 1896. 



Carlinville, Illinois ; two $j forty-one $ specimens ; Ct., 

 N.Y. (Cress.). 



Osmia illinoensis $. 



Entirely bright green, of the shade of Augochlora viridula, 

 including the tegulae and legs, except apical joints of tarsi ; 

 with a bluish or purplish reflection ; closely and rather finely 

 punctured, most coarsely on the head, most finely and sparsely 

 on abdomen, which is shining; pubescence long and thin, 

 white below, especially on clypeus where it is also dense, 

 above slightly tinged with ochraceous, on the abdomen short 

 and appearing subfuscous; wings hyaline, nervures fuscous, 

 second submarginal cell longer than first, narrowing nearly 

 one-half towards marginal, receiving first recurrent nervure 

 nearly one-third from base, the second near the tip ; sixth 

 segment slightly sulcata on the disc longitudinally, the apical 

 margin produced, slightly sinuate on the sides, entire medi- 

 ally, with only the slightest indication of a notch, apical 

 segment strongly bifid. Length 8 mm. 



Carlinville, Illinois ; one ^ specimen. 



Heriades Spin. 

 Heriades bdcconis Say. 



Osmia bucconis Say, Bost. Journ, I, 400, 9 J*, 1837, Lee. Edit. II, 777, 



1859. 

 Osmia bucconis Cresson, Proc. Ent. Soc. Phil. Ill, ^J^, 1864. 

 Megachile osmoides Cresson, Trans. Am. Ent. Soc. IV, 269, $c?, 1872. 

 Heriades ? denticulatum Cresson, Trans. Am. Ent. Soc. VII, 108, cf, 1878. 

 ? Osmia bucconis Provancher, Nat. Can. XIII, 208, $ J*, 1882. 

 ? Osmia bucconis Provancher, Faun. Ent. Can. Hym., 708, 9cff 1883. 



