GOMPHUS 95 
40. Gomphus scudderi Selys 
Selys ’73, p. 752: Mtk. Cat. p. 96: Howe ’18, p. 35: ’23, p. 136: Garm. ’27, p. 161. 
Length 58 mm. Expanse 75 mm. Me. to N. Y. 
A stout blackish species, narrowly striped with green. Face green, cross- 
striped with black on all the sutures. Labrum bordered with black, and more 
or less divided by a median streak of the same color. Occiput yellow, with a 
heavy fringe of black hairs. Thoracic stripes of the first pair fused, broadly 
widened forward, much broader than the two oblique green stripes on the front, 
which, by confluence with stripe 2 at both ends, they entirely surround. Stripes 
2 and 3 broad, confluent in the middle and almost so to the ends. Stripes 4 and 5 
broad and more or less confluent, often only an obscure, oblique pale streak 
showing between them. Wings hyaline, veins black. Legs black. Middorsal 
line of pale markings of the abdomen almost obliterated on the middle segments; 
short triangles on 8 and 9; 10 black above. The large side spots of yellow in the 
greatly dilated lateral margins of 8 and 9 do not touch the lateral margin. 
This is a late season species, whose home is in cold spring-fed wood- 
land streams. 
41. Gomphus amnicola Walsh 
Walsh ’62, p. 396: Mtk. Cat. p. 89: Howe ’23, p. 136: Garm. ’27, p. 160. 
Length 48 mm. Expanse 72 mm. Mass. and N. Y. to Iowa 
A very dainty species with much black on the front and yellow on the sides 
of the thorax. Face greenish, with narrow black cross lines on the upper and 
lower sutures, and on the ends of the middle suture, and across the lower margin 
of the labrum. Occiput yellow, with blackened outer angles. Middorsal thoracic 
stripes of the first pair separated by a yellow carina, narrow (much narrower 
than the bordering pale stripes), laterally extended below to join stripe 2 above 
the collar. Stripe 2 very broad, almost entirely confluent with 3, which is 
narrower. Stripe 4 narrow but continuous. Stripe 5 obsolete. Legs black; front 
femora more or less greenish beneath. Wings hyaline, veins brown. The mid- 
dorsal line of triangles on the abdomen is very narrow upon the middle segments, 
then is broadened on 8 to form a wide triangular spot, with a corresponding dot 
on 9. The large yellow side spots on 7-9 do not touch the widely expanded 
lateral margin. 
42. Gomphus vastus Walsh 
Walsh ’62, p. 391: Mtk. Cat. p. 97: Howe ’18, p. 33: Calv. ’21, p. 225 (figs.). 
Garm,, ’27,-p;. 165: 
Length 54 mm. Expanse 66 mm. N. H., N. Y., Pa., Tenn., Iowa 
This is a fine species, with yellowish green thorax, brightly striped with 
brown, and with blackish abdomen, brightly marked with yellow at both ends. 
Face broadly cross-striped with black on all sutures and on the lower margin of 
the labrum, the latter more or less divided also by a median black line, leaving 
only the sides greenish. Occiput yellow, with a fine black long-ciliate margin. 
Thoracic stripes of the first pair fused and dilated in front to form a broad tri- 
