No. 22.] HYMENOPTERA OF CONNECTICUT. 753 



D. notatum Latreille. 



Sachem's Head, i August, 1904 (H. L. V.). 



CERATINID^. 



These are the small carpenter-bees, represented in this State 

 by a single genus and two species. 



\ Ceratina Latreille. 



Key to Species. 



Females. 



Length 7-8 mm., bluish green, wings faintly smoky; tubercles 

 white or cream color; without a pale lateral face mark. 



Males. 



Apical abdominal plate not subacute, lip-like in outline; 

 tubercles pale, white or cream-color; mandibles dark at 

 base; anterior tibiae blue in front, light stripe on outer 

 side poorly defined or absent; face and disc of dorsal 

 abdomir^l segments closely punctate dupla 



Apical plate of abdomen subacute; tubercles as in dupla; 

 brassy green; arms of clypeal mark about equal; anterior 

 tibiae with a white line extending their entire length; length 

 5-6 mm metallica 



C. dupla Say. Howard, Insect Book, PI. i. Fig. 25, 

 Occurs all over the State in May, June, July, and August, 

 replacing the pith of elder, etc., with its cells, and visiting flowers 

 of the red raspberry and goldenrod. Has. been taken at Branford, 

 New Haven, Colebrook, Prospect, Stafford, and Stonington. 



C. metallica H. S. Smith. The females of this species 

 appear to be indistinguishable from the females of dupla. 

 Plantsville, 15 October, 1906 (A. R. Selig). 



XYLOCOPID^. 

 This family is represented in Connecticut by a single species, 

 the well-known carpenter-bee, which sometimes makes itself dis- 

 liked by tunneling in posts used to support buildings. 



Xylocopa virginica Drury. PI. x, Fig. 2. 



Superficially like Bremus impatiens, but the male has a 

 " white face." No doubt occurs throughout the State from May 

 to October. Visits apple blossoms. Branford, New Haven, and 



Hartford. 

 48 



