Robertson — North American Bees. 327 



mean that his species came from the continent of North 

 America, that he did not know where it came from, or 

 that the description of Apis viridula does not apply to the 

 North American species. However, the localities in the 

 American part of Dalla Torre's catalogue should always be 

 verified. 



Provancher's Augochlora radiata, described as having the 

 abdomen " noir bleuatre," evidently belongs here and not 

 under Agapostemon radiatus. 



Agapostemon radiatus Say. 



Halictus radiatus Say, Bost. Journ. I, 394, 9> 1837, Lee. Edit. II, 772. 



Halictus tricolor Lepeletier, Hist. Ins. Hym. II, 289, ^, 1841. 



Augochlora radiata Smith, Brit. Mus. Cat. Hym. I, 80, 9> 1853. 



? Agapostemon tricolor Smith, Brit. Mus. Cat. Hym. I, 86, tf, 1853. 



Agapostemon tricolor Provancher, Nat. Can. XIII, 203, <$, 1882. 



Agapostemon tricolor Provancher, Faun. Ent. Can. Hym., 703, tf, 1883. 



Agapostemon radiatus Cresson, Synopsis, 293, $, 1887. 



Agapostemon radiatus Robertson, Trans. Am. Ent. Soc. XX, 147, 9(5\ in 

 part, 1893. 



Augochlora radiata Dalla Torre, Cat. Hym. X, 96, £, in part, 1896. 



§. — Golden green ; wings hyaline, slightly clouded at apex ; 

 disc of metathorax strongly longitudinally rugose, without 

 triangular inclosure. 



$. — Wings hyaline, apical margins slightly clouded ; disc 

 of metathorax more irregularly rugose or reticulated, trunca- 

 tion often strongly notched above; trochanters yellow, some- 

 times dark above and behind, especially the posterior ones; 

 femora at base yellow, or with a slight trace of black, a spot 

 at apex above, sometimes wanting on anterior pair, posterior 

 femora rather strongly incrassate ; tibiae at base exteriorly 

 with a black spot extending more or less towards tips, hind 

 tibiae sometimes black at tips and rarely with a spot within; 

 abdomen black, often showing greenish, six banded, ventral 

 segments 2-4 broadly yellow at base, fifth, and sometimes the 

 others, variously narrowed or interrupted, third from the last 

 short, widely emarginate, edges thickened, greenish, last not 

 carinate, with a yellow spot at basal angles, extending more 

 or less towards tips and leaving only a dark median stripe. 

 Length 9-11 mm. 



107 $, 83 $ specimens; Can., N. H., Mass., N. Y., N. J., 



