No. 22.] HYMENOPTERA OF CONNECTICUT. 723 



2. Females 3 



Males; intermediate joints of antennae longer than thick 7 



3. Pygidium ovate, sparsely punctate and pubescent; lower 



anterior orbits not yellowish; mesonotum not lined; head 

 and thorax almost entirely red; second to fifth dorsal 

 abdominal segments with a yellow mark on each side . . . 



maculate 

 Pygidium triangular, sparsely punctate and pubescent; lower 

 anterior orbits not yellowish; mesonotum one-lined; 

 rather dark red; spots distinct, large on second segment 4 



4. First dorsal 'abdominal segment without a yellow mark, 



second and third segments with a yellow mark on each 



side 5 



First dorsal abdominal segment as well as second to fifth 

 segments with a yellow mark on each side cuneata var. notata 



5. Fifth dorsal abdominal segment with a yellow mark on each 



side 6 



Fifth dorsal abdominal segment as well as fourth without 

 a yellow mark on each side cuneata var. quadrisignata 



6. Fourth dorsal abdominal segment with a yellow mark on 



each side cuneata var. octonotata 



Fourth dorsal abdominal segment without a yellow mark on 

 each side cuneata var. sexnotata 



7. Tegulae and legs red; scutel usually red; abdomen varying 



from six- to eight-spotted cuneata 



Tegulae and legs mostly brownish; scutel black, thorax black; 

 head mostly black; first dorsal abdominal segment with 

 two luteous spots, second to sixth segments with a luteous 

 band bella 



8. Fore coxae with long, pubescent spines; abdomen distinctly 



punctate; third antennal joint shorter than fourth; basal 

 vein inserted a little before nervulus; marginal cell acute 



americana 



Fore coxae simple, rarely with short, indistinct spines 10 



9. Females I0 



Males 2 5 



10. Third antennal joint not distinctly shorter than fourth 11 



Third antennal joint distinctly shorter than fourth 17 



11. Third antennal joint only a little shorter or just as long as 



fourth ; I2 



Third antennal joint longer than fourth, rarely a little 

 shorter; head and thorax with yellow ornaments, usually 

 black I3 



12. Basal vein inserted before nervulus; apex of hind tibiae with 



black, curved bristles; second dorsal abdominal segment 

 with a yellow spot on each side, rest of abdomen mostly 



