No. 22,] HYMENOPTERA OF CONNECTICUT. 349 



closely and finely punctate; thorax partly dusky; hind 

 tibiae palfe at base, fuscous at apex; antennae with a pale 

 annulus. Length 6 mm nanus 



55. Abdomen blue, at least above 56 



Abdomen black and reddish, at least above 57 



56. Hind legs blue, immaculate; scutel w^ith only about six dis- 



tinct punctures; apex of abdomen immaculate; length 15 

 mm.; flagel blackish, except seventh to thirteenth joints, 

 which are mostly yellowish brown; face rather umbili- 

 cately punctate; greatest dimension of spaces between 

 punctures, on dorsulum, equal to three or four puncture 

 widths; basal area, areola and petiolarea confluent, these, 

 together with external area, apparently impunctate, and 

 seemingly finely striate; punctures on rest of body about 

 as far apart as those on dorsulum; radial side of areolet 

 less than one-half as long as shortest side of areolet . .sassacus 

 Hind legs reddish, except tips of tibiae and tarsi, which are 

 black; abdomen fusiform. Length 14 mm ..ormenus 



57. Apex of abdomen black 58 



Apex of abdomen reddish 59 



58. Scutel black, mid and hind legs black or blackish throughout. 



Length 14 mm rufizonatus 



Scutel pale; hind legs black; bases of tibiae reddish; antennae 

 with joints of basal portion oblong in profile; second, 

 third and fourth dorsal abdominal segments and apex of 

 first, reddish; segments at apex of abdomen with a pale 

 spot. Length 1 1 mm nortoni 



59. Head and thorax more or less reddish 60 



Head and thorax black; hind legs entirely black; postpetiole 



scratched above; third joint of antennae much longer than 

 fourth. Length 12.5-15 mm detritus 



60. Abdomen fusiform, its dorsal segments generally more or 



less black at base; basal portion of flagel with its joints 

 scarcely twice as long as broad, except first joint, which 

 is three times as long as broad; thorax generally mostly 

 reddish, and with black sutures; length 11-14 mm.; antennae 



with more or less of a yellow annulus suturalis 



Abdomen subcompressed at tip; antennae with a pale annulus. 

 Length 14 mm anceps 



Males. 

 I. Second and fourth ventral abdominal segments with a longi- 

 tudinal median ridge or fold; propodeum rarely bispinose, 

 scutel more or less flat, or simply convex, then gradually 

 sloping to apex 2 



