No. 22.] HYMENOPTERA OF CONNECTICUT. 635 



E. fraterna Say. Potter Wasp. PI. viii, Fig. 5 (adult) ; PI. 

 iv, Fig. 2 (nest). 



Wings smoky, with violet iridescence. Length 13-17 mm. 



Occurs throughout the State, and is known to store its nests 

 with canker-worms and caterpillars of butterflies. New Haven 

 North Haven, Hamden, Branford, Orange, Stafford (W. E. B., 

 B. H. W., H. L. V., E. J. S. M.). 



Monobia De Saussure. 



Another genus represented in the State by but one species. 



M. quadridens Linnaeus. Howard, Insect Book, PI. v, 

 Fig. 2. 



Length 20 mm. Black, with whitish markings which make it 

 very like Odynerus bidens, from which it is superficially distin- 

 guished by the clypeus being armed with two teeth. 



Undoubtedly occurs throughout the State. New Haven, 13 

 May, 1904, 25 July, 1905 (W. E. B.) ; Branford, 25 July, 1905 

 (H. W. W.) ; Stonington, 26 July, 1906 (J. A. Hyslop). 



Nortonia De Saussure. 

 Also represented by but one species in the East. 

 N. symmorpha De Saussure. 



Length 17 mm. Black, shining, with yellow markings; an- 

 tennae reddish beneath ; wings transparent, brown, with beautiful 

 violet reflections. 



Odynerus Latreille. 

 A large genus with many species representing it in this State. 



Key to Species. 



1. First abdominal segment with a transverse keel 2 



First abdominal segment without a transverse keel VJ 



2. First abdominal segment with a longitudinal groove down 



the middle and with a whitish or yellowish apical border 



(Symmorphus) 3 



First abdominal segment without a longitudinal groove down 

 the middle (Ancistrocerus) 7 



3. Second abdominal segment with a whitish or yellowish apical 



border 4 



Second abdominal segment without a whitish or yellowish 

 apical border, the third and fourth abdominal segments 

 with a yellowish apical border; length 11 mm Philadelphia; 



