No. 22.] HYMENOPTERA OF CONNECTICUT. 747 



with a slight median tubercle; first dorsal abdominal seg- 

 ment with apical fasciae, edge of concavity hardly carinate 2 

 Cheeks beneath punctate, concave, their posterior edge cari- 

 nate 5 



2. Beveled portion of cheeks rather opaque and rough; disc of 



abdomen opaque, densely punctate, deep transverse basal 

 sulcus on second segment; fourth ventral segment biden- 



tate, legs black 3 



Beveled portion of cheeks shining; impunctate; fourth ventral 

 abdominal segment entire 4 



3. Tarsi red dubitata 



Tarsi black dubitata var. melanopoda 



4. Disc of abdomen shining, rather sparsely punctate, sulcus on 



its second dorsal segment rather shallow; legs black, 



tibiae and tarsi more or less tinged with red sa3ri 



Disc of abdomen opaque, densely punctate, sulcus on its 

 second segment rather deep; legs reddish octodentata 



5. Second and third dorsal abdominal segments without basal 



pubescent fasciae, fifth with rudimentary lateral spines, 

 sixth with two lateral and four terminal spines, median 

 sulcus about one-third the width of the segment; femora 



blackish brown, tibiae and tarsi more brownish sodalis 



Second and third dorsal abdominal segments with basal inter- 

 rupted pubescent fasciae, fifth with lateral spines, sixth with 

 two lateral and four terminal spines, median sulcus about 

 one-third the width of the segment; legs black; fourth 

 ventral abdominal segment not spinose .lateralis 



C. sayi Robertson. 



New Haven, 20 June, 1902 (E. J. S. M.) ; New Canaan, 14 

 September, 1905 (B. H. W.). 



®C. lucrosa Cresson. 



*C. moesta Cresson. 

 Type locality: Connecticut (E. N.). 



C. dubitata Smith. C. rufitarsus Smith. Howard, Insect 

 Book, PI. iv, Fig. 10. 



New Haven, 20 July, 1904; 8 October, 1903 (W. E. B.) ; 16 

 October, 1903 (H. L. V.). 



*C. dubitata var. melanopoda Viereck (new variety). 

 Type-locality: New Haven, 17 June, 1905, on flowers of wild 

 red raspberry (Rubus strigosus) (H. L. V.). 



C. octodentata Say. Howard, Insect Book. PI. iii, Fig. 10. 



