726 CONNECTICUT GEOL. AND NAT. HIST. SURVEY. [Bull. 



32. Flagel and fore coxae not denticulate 33 



Flagel and fore coxae denticulate; a yellowish spot on each 



side of second segment, as well as sometimes on first, 

 and usually a continuous yellowish band on third to sixth 

 segments denticulata 



33. Fourth antennal joint as long as thirteenth 34 



Fourth antennal joint shorter than thirteenth; apical half of 



abdomen reddish; middle of flagel longer than thick 



illinoiensis 



34. Thorax almost entirely black; dorsulum entirely black sayi 



Thorax partly black; dorsulum mostly reddish with a black 



stripe down the middle pygmaea 



35. First dorsal abdominal segment without a spot on each side 36 

 First to third dorsal abdominal segments with a yellowish 



spot on each side; apex of seventh dorsal segment deeply 

 notched articulata 



36. Second and third dorsal abdominal segments with a yellowish 



spot on each side; first usually with an interrupted band, 

 fourth with a band or two spots on each side, fifth with a 

 discal band and a spot on each side, sixth like fifth, or 

 lateral spots wanting, seventh with apex slightly notched 



vicina 

 Second to fifth dorsal abdominal segments with a more or 

 less interrupted yellowish band, sixth with a band; 

 head and thorax almost entirely black gracilis 



N. (Gnathias) maculata Cresson. Howard, Insect Book, 

 PI. iv, Fig. 15. 



N. (G.) cuneata Robertson. 



New Haven, 4 May, 1904, Double Beach, 5 July, 1904 

 (H. L. v.). 



'N. (G.) cuneata var. notata Robertson. 

 *N. (G.) cuneata var. octonotata Robertson. 

 'N. (G.) cuneata var. sexnotata Robertson. 

 'N. (G.) cuneata var. quadrisignata Robertson. 

 N. (G.) bella Cresson. 



N. (Centrias) americana Kirby. 

 West Haven, 27 June, 1905 (H. L. V.) 



*N. (C.) incerta Cresson. 



°N. ( Phor) proxima Cresson. 



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