No. 22.] HYMENOPTERA OF CONNECTICUT. 639 



O. (A.) birenimaculatus De Saussure. PI. iv, Fig. i (nest). 



Length 14 mm. 



Found throughout New England. Plantsville (A. 

 Shepard) ; New Haven, 5 June, 1906, Stonington, 1907 (W. 

 E. B.). 



O. (A.) capra De Saussure. Howard, Insect Book, PI. v, 

 Figs. 4, 7. 



Length 14-17 mm. 



Common everywhere in the State. New Haven, Mt. Carmel, 

 Branford, Westbrook, (H. L. V., E. J. S. M., W. E. B., B. H. 

 W., P. L. B.). 



O. (A.) albophaleratus De Saussure. 



Length 10-13 mm - 



Very likely occurs throughout the State. 



O. (A.) tigris De Saussure. Howard, Insect Book, PI. vi, 



Fig- 15- 



Length 8-1 1 mm. 



Common all over the State. New Haven, (H. L. V., P. L. 

 B.) ; Sachem's Head, Westbrook, Colebrook (H. L. V.) ; Bran- 

 ford (H. W. W.) ; Stafford, Brookfield (W. E. B.). 



O. (A) catskilli De Saussure. 

 Length 9.5-1 1.5 mm. 



Has been taken on goldenrod flowers at Scotland (B. H. W.), 

 and will be found throughout the State. 



0. bidens De Saussure. 

 Length 20 mm. 



O. boscii LePeletier. 



Length 14 mm. 



Was found in this State by Norton. 



O. dorsalis Fabricius. Howard, Insect Book, PI. vi, Fig. 14. 



Length 17 mm. 



New Haven, 24 June, 1902 (E. J. S. M.). 



O. leucomelas De Saussure. 

 Length 9-14 mm. 



Was first taken in the State by Norton. New Haven, 24 

 May, 1904 (H. L. V.). 



