94 DRAGONFLIES OF NORTH AMERICA 
37. Gomphus donneri Kennedy 
Kndy. 717, p. 562 (figs.). 
Length 55 mm. Expanse 80 mm. Calif. 
“An almost black species,’’ similar to the preceding, and doubtfully distinct 
therefrom; differs from confraternus by having thoracic stripes 2 and 3 wholly 
confluent, by greater extent of black upon the abdomen, and by the slight differ- 
ences of form shown in the accompanying figures of the male appendages. 
Dr. Kennedy (’17) observed the species at Donner Lake, Nevada 
Co., California (elevation about 5000 ft.). He says: 
It passes most of its time resting on the bare beach or some low stone, though 
it occasionally lit on a low bush or weed. Along the west shore, where the sandy 
beach was continuous, it was the only species found, but along the west end of 
the north shore, where sandy stretches alternated with gravel and rock it was 
associated with Ophiogomphus morrisoni, Enallagma cyathigerum, and Argia 
vivida. 
38. Gomphus consanguis Selys 
Selys ’79, p. 66. 
Length 55 mm. Expanse 68 mm. N.C. 
This species is unknown to us. We abstract the following from de Selys 
original description. Face and front yellow, olivaceous, with both front and rear 
borders and a central spot on the labrum black. Fronto-clypeal suture and two 
impressions on the postclypeus also black. Occiput yellow, ciliated with black. 
Front of thorax yellow striped with black. Stripes of the first pair narrowly 
separated on the carina, and abbreviated below, not touching the collar. Stripe 2 
and 3 broader, close together but not confluent, complete. Stripes 4 and 5 com- 
plete. Legs black with the front femora pale beneath. Wings hyaline. Abdomen 
black marked with yellow at the base, there being a three lobed spot on the 
dorsum of segment 2, and side spots on 1 and 2 that are prolonged into a line 
inferiorly on 3 to 7. The dilated lateral margins of 8 and 9 are also yellow and 
there is a vestige of a basal yellow line on 8. Appendages black, as long as 10, 
subequal. 
Female unknown. 
39. Gomphus adelphus Selys 
Selys ’58, p. 413: Mtk. Cat. p. 89: Howe ’18, p. 33. 
Length 43 mm. Expanse 58 mm. N. Y., Mass. 
This is a greenish species, heavily striped with black. Labrum yellow, 
bordered and traversed by black. Anteclypeus black; postclypeus bordered with 
black and with two black dots. Occiput yellow, bordered with black. Thoracic 
stripes of the first pair confluent and truncated at collar but crossing its middle 
line; stripes 2 and 3 confluent in their lower half, separated above by a pale 
streak that widens next to the crest. Abdomen with the usual line of mid- 
dorsal triangles on the bases of the segments. Sides of 8, 9 and 10 black. 
