200 DRAGONFLIES OF NORTH AMERICA 
169. Williamsonia lintneri Hagen 
Hag. ’78, p. 187: Mtk. Cat. p. 128: Dav. 713, p. 93: Howe ’19, p. 53: Wmsn. 
23, p. 97: Howe ’28, p. 222. 
Length 30 mm. Expanse 47 mm. N. Y., N. J., Mass. 
A dainty little slender Corduline, the smallest member of the subfamily in 
our fauna. Face greenish. Labrum yellow. Anteclypeus brown in the middle. 
Thorax brown, hairy, with some blackish lines on the lateral suture. Abdomen 
short, narrow, cylindric, swollen at the base, blackish. Segments 2 to 9 ringed 
with yellow at the apex, and 8 also at the base. 
This is an early season (April to June), species concerning which 
Howe (’23, p. 222) writes: 
I always find it a woodland species inhabiting the neighborhood of cold bogs 
and brook runs, and it alights generally on stones. The orange ring on each 
abdominal segment makes the insect particularly easy of identification in the 
field. 
170. Williamsonia fletcheri Williamson 
Wmen. ’23, p. 96: Howe ’28, p. 222. 
Length 30. Expanse 47 mm. 
Face blackish; frons above with metallic green reflections. Thorax blackish. 
fletcheri 
Legs black. Wings hyaline with a tinge of yellow at the extreme base. Mem- 
branule whitish. Costa yellowish to the nodus. Stigma brown. Abdomen with 
only obscure paler markings on the sides of segments 2 to 5. 
Can. 
aN 
lintneri 

