110 DRAGONFLIES OF NORTH AMERICA 
are of about equal width; the latter is sometimes narrowly divided by pale green- 
ish on the upper part of the suture. Stripes 4 and 5 complete, angulated, variable, 
more or less overspreading the intervening area. Wings hyaline; stigma tawny. 
Legs blackish, with only the sides of the front femora pale. The middorsal spots 
of the abdomen are shortened on segments 6 and 7; 8, 9, and 10 are black above, 
yellow at the side margins. Appendages black. 
This rather local species is not uncommon at Ithaca, N. Y. in the 
latter part of May. The males sometimes occur in large numbers, 
foraging over meadows half a mile back from the streams in the lee of 
the forests. The senior author once found a number of them going to 
roost at 3 in the afternoon in a pine tree, and clubbed them out and 
caught them with a net. 
Transformation occurs very early in the morning within from one 
to three feet of the edge of the stream. 
62. Gomphus borealis Needham 
Ndm. ’00, p. 454: Mtk. Cat. p. 90: Howe ’18, p. 33: Garm. ’27, p. 157. 
Length 49 mm. Expanse 62 mm. IN. NG Yew Nee: 
Similar to the preceding species (G. descriptus); distinguishable only by the 
form of the appendages. 
63. Gomphus abditus Butler 
Butler ’14, p. 347. 
Length 50 mm. Expanse 66 mm. Mass. 
This is a slender pale green species striped with brown. Face obscure, with 
broad pale brown cross-stripes on frontal and labral sutures and another on the 
free border of the labrum. There is also a suggestion of a median longitudinal 
stripe on the labrum. Occiput yellow, with a touch of brown on the outermost 
OEMS 
NA in 


vim 
abditus 

