No. 22.] HYMENOPTERA OF CONNECTICUT. 325 



yellowish or brownish yellow; length of most specimens 

 much more than 15 mm 4 



2. Length much more than 15 mm 3 



Length less than 15 mm.; thorax and abdomen entirely black 



nidda 



3. Female mostly blackish, with fuscous wings; male mostly 



dark brown, with a dark brown median stripe or area on 

 propodeum; exserted portion of abdomen about as in 



lunator atrata 



Both sexes mostly pale brown; wings not fuscous; male 

 without a median dark brown area or stripe on propodeum; 

 exserted portion of ovipositor about as in lunator; abdo- 

 men laterally with yellow spots, at least in female nortoni 



4. Body mostly pale brown in color; exserted portion of ovi- 



positor not much longer than body, or about twice the 



length of body 5 



Body mostly dark brown in color; exserted portion of ovi- 

 positor somewhat more than twice the length of the body; 

 fore wings dark brown along basal vein as well as else- 

 where lunator 



5. Fore wings dark brown along basal vein as well as else- 



where; exserted portion of ovipositor twice as long as 



the body lunator 



Fore wings not dark brown, except in basal third of radial 

 cell, or in its basal half, and in part of adjoining portion 

 of cubitodiscoidal cell greenei 



M. atrata (Fabricus). PI. ix, Figs. 5, 6. Howard, Insect 

 Book, PI. ix, Fig. I. 



New Haven, 25 May, 1896 (W. C. Sturgis), June, 1906 (W. 

 E. B.), August, 1906 (B. H. W.). 



M. lunator (Fabricus). PI. ix, Fig. 4. Howard, Insect Book, 

 PI. ix, Figs. 3, 4; Text Figs. 35, 36. 



Parasitic on Tremex columba. 



New Haven, 25 May, 1896, 25 May, 1898, 4 August, 1896 

 (W. C. Sturgis), June, 1906 (W. E. B.), August, 1906 

 (B. H. W.). 



M. nortoni (Cresson). Howard, Insect Book, PI. viii, 

 Fig. 38. 



M. nitida (Cresson). 



Wallingford, 30 November, 1912 (D. J. Caffrey). 



M. greenei Viereck. 



New Haven, 10 August, 1909 (A. I. Bourne). 



