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 . . . 



maculata 

 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 bclla 



8. Fore coxse 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 10 



Males 25 



10. Third antennal joint not distinctly shorter than fourth li 



Third antennal joint distinctly shorter than fourth 17 



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



fourth 12 



Third antennal joint longer than fourth, rarely a little 

 shorter; head and thorax with yellow ornaments, usually 

 black , 13 



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 



