114 DRAGONFLIES OF NORTH AMERICA 
the knees and on the under side of the tibiae. Tarsi wholly black. Middle ab- 
dominal segments obscure greenish olivaceous; 3 to 6 each with an incomplete 
basal blackish ring, 7, 8 and 9 rusty brown; 10 and appendages yellow. 
This species was observed near Galesburg IIl. by the senior author in 
1896. It was common about the sloping shores of a small artificial lake. 
It rested much on the flat dirt roads and paths and on the mud close to 
the water’s edge. Its flights were short, much like the flights of robber- 
flies, direct from one objective to another, at low elevation. It has a 
long season, being collected first on May 28th, and being most abundant 
about July 4th. Transformations occurred between daylight and sun 
rise, and the cast skins were left lying flat on the mud from one to three 
feet from the edge of the water. 
67. Gomphus subapicalis Williamson 
Wmen. ’14, p. 54: Kndy. ’21, p. 596 (figs.). 
Length 56 mm. Expanse 68 mm. Tex. 
A similar southwestern species, with unmarked face and occiput, the thoracic 
stripes of the first pair usually present but narrow and incomplete, stripes 2 
and 3 of about equal width. The rusty color of the tip of the abdomen is less ex- 
tended, being little developed on segment 7. 
68. Gomphus pallidus Rambur 
Ramb. ’42, p. 163: Mtk. Cat. p. 95: Wmsn. ’14, p. 54 (figs.). 
Syn: pilipes Hag 
Length 56 mm. Expanse 68 mm. Ga. 
A large pale olivaceous species, almost without thoracic stripes and with 
long hairy hind legs. Face and occiput pale greenish. The usual thoracic stripes 
are represented by indistinct traces, that of the 3rd pair (on the humeral suture) 
being best developed. Wings hyaline, costa and stigma yellow. Legs pale, 
blackened at tip of tibia and on tarsi; the first and second tarsal segments are 
yellow on the dorsal side. The middle abdominal segments have a somewhat 
annulate appearance, the pale color of the dorsum overspreading the sides, 
leaving them darker apically. Segments 7—9 are rusty brown; 10 and appendages 
yellow dull yellow. 
Wilson’s observations (’17, p. 192) on this species are that: 
It flies comparatively slowly and hovers a great deal; its wings have a yellow- 
ish tinge, very visible when hovering. When it alights on a pebbly beach it 
hovers a moment and apparently feels the rock, testing it before settling, and 
meanwhile holdings its abdomen pointing upward. It then settles down slowly, 
lowering the abdomen until it is flat against the rock. In this position its colors 
harmonize so well with the surroundings that it can be seen only in a favorable 
light. It also frequently alighted on the boat, holding its abdomen elevated at 
an angle of 45. 
