88 Bulletin Wisconsin Natural History Society. [Vol. 6, Nos. 1 — 2. 
Suhgen us AKIGOMPHUS. 
Like the preceding- this group has two cells at the origin of veins 
Al and A2. Distinctive characters are : the apex of abdominal seg- 
ment 8 cut obliquely ; the dissimilarity of the hind femora of the sexes, 
hairy in the male, spinose in the female ; the posterior direction of the 
posterior male genital hamule. Four species belong to this subgenus. 
1. Segment 10 and the abdominal appendages yellow 2 
Segment 10 and abdominal appendages black splcatus 
2. Occiput even, segment 9 black 3 
Occiput with a prominent median spine, segment 9 yellow.... 
villosipes 
3. ^lale superior appendages seemingly bifurcate, segment 8 black, 
10 largely yellow furcifer 
jVIale superior appendages bifurcate, segment 8 and 10 with yel- 
low spot cornutus 
Qomphus spicatiis Hagen. Bull. Ac. Belg. 21 (2). p. 54, 1854; Syn. 
Neur. X. Am., p. 107, 1861 ; Needham, Bull. 47, N. Y. State Mus., p. 450, 
1901 (Bibliography & Desc. of niymiph) ; Needham & Hart, Bull. 111. 
State Lab. 6, p. 77, 1901 (Description of nymph). 
Abd. male 36—38, female 36 ; h. w. male 28—29, female 30. 
]\rale. — Olive, brown and black. Face and occiput olive. Vertex 
black, hind margin paler. Thorax olive, marked with fuscous. A mid- 
dorsal stripe widened anteriorilj^ A humeral and antehumeral usually 
connected above. Lateral sutures marked. Legs black, fore femora 
green beneath, all tibiae with an exterior stripe of yellowish green. 
Costa yellowish green, pterostigma light brown. Abdomen with a dor- 
sal band yellow or greenish ; broad on 1 — 2, twice constricted on 2, 
lanceolate, pointed apically, the spots not reaching the apex of seg- 
ments 3 — 7. a basal triangular spot on 8 ; 9 and 10 black. Yellow or 
greenish on sides of 1 — 2, basal on 3, sides of 8 — 9. Basal spots some- 
times present on 3 — 7. Appendages normally brown, becoming black 
with age. 
Female. — Similar. The Female differs by having the fore femora 
entirely olive, and the hind femora olive with the apex darkened. Vul- 
var lamina one fourth the length of nine, bifid, separating at the top. 
Life Zone : Transition and Upper Austral. 
Wisconsin : Dane Co., May, 1900 ; Vilas Co., Divide, June 24-30, 
1907 ; Door Co., Plum Island, July 6, 1905. 
Time and Habitat — May to July about the shores of larger lakes 
and rapid streams. 
A male spicatus from Door Co. has the inferior tooth of the 
superior appendage directed inward a trifle, so as to resemble borealis 
in a distant way. But from the latter it is easily separated by the 
vittate exterior surface of the tibiae. 
Gomphus villosipes Selys is readily distinguished from all other 
Gomphines by the median spine on the hind margin of the occiput. 
The ground color is olive with dark brown markings. Thorax with 
mid-dorsal stripes short, narrow ; humeral wide, antehumeral short. 
Legs black, fore femora green beneath, all the tibiae with a g-reen stripe 
on the exterior surface. Costa of wings yellow, pterostigma light 
brown. Abdomen black, a dorsal stripe on 1 — 7, 8 — 9 brownish with 
green spots indistinct or obsolete, 10 and the appendages yellow. The 
