iyo8] 
Muttkoivski, Dragon Flies of Wisconsin. 
87 
the fore femora with olive below, the hind pair with an olive stripe 
on the outer surface. Valvar lamina extending- over two-fifths of 9, 
bifid, the apices diverging-. 
Life Zone : Upper Austral. 
Wisconsin : Milwaukee County, June 1898, June 2-12, 1902, June 
3-14, 1903. 
Time and Habitat — -May to July over rapid streams. 
Gomphus externus Selys, Mon. Gomph., p. 411, 1857; Calvert, Ent. 
News, 12, p. 71, 1901 (Characters & Synonomy) ; Needham & Hart, 
Bull. 111. State Lab., 6. p. 74, 1901. 
Abd. male 37 ; h. w. male 31—32. 
Male. — Dark brown and yellow. Occiput and face olive. Thorax 
yellow, a mid-dorsal brown stripe not reaching the anterior edge, 
divided by the carina. Humeral and antehumeral not connected, dark 
brown. Some brown on the lateral sutures. Legs black, all tibiae with 
a yellow or green stripe. Wings hyaline, the costa yellowish green, 
pterostigma brown. Abdomen with brown and yellow. A mid-dorsal 
yellow stripe on 1 — 3, reduced to basal dashes on 4 — 10. Sides of 1 — 3 
and 7 — 9 yellow. 
Female. — Similar. The hind margin of the occiput is very variable 
in shape, some specimens having- it almost straight, others with several 
convexities and a median notch. Vulvar lamina contigaious for the basal 
two-thirds, tips acute, separating, the lateral margins parallel. 
Life Zone : Upper Austral. 
Wisconsin : Southeastern part of the State. 
Time and Habitat — May to July over rapid streams. 
Gomphus graslinellus Walsh, Proc. Ac. Phila., p. 394, 1862 (Descrip- 
tion) ; Kellicott, Dragonfield of Ohio, p. 62, 1899 (Description) ; Wil- 
liamson, Dragonflies of Indiana, p. 290, 1900 (Description) ; Needham 
& Hart, Bull. 111. State Lab. 6, p. 69, 1901 (Nymph) ; Williamson, Ent. 
News, 14, -p. 253, 1903 (Structural Characters & Description). 
Abd. male 35, female 36 ; h. w. male 31, female 32. 
Male. — Black, green and yellow. Face and occiput green, vertex 
black. Thorax green, with dark-brown markings. A mid-dorsal stripe 
wider at the anterior edg'e, humeral and antehumeral as wide as the 
mid-dorsal stripe, always connected at both ends, enclosing a fine green 
stripe, which is sometimes obsolete. Legs black, fore femora green 
beneath, all tibiae with an exterior green stripe. Costa green, ptero- 
stigma brown. Abdomen with a dorsal green stripe on all segments, 
becoming yellow on the apical segments. The stripe is broad on 1 — 2, 
twice constricted on 2, lanceolate on 3 — 7, interrupted at the apex of 
each segment, a basal triangular spot on 8, a broad streak on 9, fine 
and linear on 10. Sides with 1 — 3 and 8 — 10 yellow, basal spots on 
1 — 7. Most of 10 and the appendages black. 
Female. — Similar. More green and yellow on the abdomen. Seg- 
ments with lateral streaks interrupted at the apex. Segment 10 largely 
yellow. Vulvar lamina short, broadly bifid. 
Life Zone : Upper Austral. 
Wisconsin : Milwaukee Co., Chicago road, July 26, 1902. 
Time and Habitat — June to July in woods, and along streams. 
A female taken with the male in Wisconsin has two cells between 
veins Al and A2 at their origin, but otherwise it has the normal num- 
ber of nine cells between the two veins. 
