1908] 
Muttkousli. Dragon Flicf< of Wisconsin. 
89 
female has more yellow on ^the sides of the abdomen. Vulvar lamina 
short, bifid, the apices contig^uoiis. The number of points on the oc- 
cipital spine varies, sometimes as many as four points are present, 
other specimens have less, or the spine is simple. The range of this 
species covers two life zones. Transition and Upper Austral. 
Gotnphus furcifer Hagen. This si^ecies differs from the preceding- 
mainly by the absence of the spine on the occiput. A minor difference 
is that the humeral and antehumeral stripes are often connected a])ove. 
The appendag'es of the male are sufficiently distinct to separate it 
from villosipes. The vnlvar lamina of the female are short, triangular, 
the apices separated (not contiguous) the lobes rounded. The life 
zone is similar to that of the preceding species. 
Gomphus cornutus Tough, Occas. Mem. Chicago Ent. Soc. 1, p. 
17, 1900 (Description & Figure). 
Abd. male 40^ — 42, h. w. male 32 — 33. (Female unknown). 
Male. — Yellowish green, marked with black and brown. Face and. 
occiput olive, the occiput margined with black, ciliated. Thorax olive. 
A mid -dorsal brown band on each side of the carina narrow, becoming 
obsolete at the anterior edge of the thorax. Humeral and antehumeral 
present. Leg's black, fore femora olive beneath. Wings with costa 
olive, pterostigma light brown. Abdomen with a dorsal band of green- 
ish yellow, the band reduced to lanceolate spots on the posterior seg- 
ments, small and basal on 8. Dorsum of 9 black, 10 with a small spot, 
the appendages brown. The superiors are distinctly bifid, the external 
branch shorter, obtuse ; the internal branch produced far inward, mov- 
ing away from the exterior branch at an angle of more than 100°, 
slender, the apex acute. 
Life Zone : Upper Austral and Transition. The designation of a 
limited life area for this species can be only tentative, since up to 
present year the species has been found in but two states, originally 
in Illinois. 
Wisconsin: Dane Co., June 22, 1900 (Wm. S. Marshall). 
Time and Habitat — June, about the shores of lakes. 
Suhffciiiis OOMPHURIJt^. The two following groups form a subdivi- 
sion distinct from the preceding species. Both groups have in common 
the chief generic character, the presence of a single cell at the origin 
of veins A2 and A2, this cell with a thickened border, lending it such 
prominence as to form a distinct anal loop. Besides the anal loop the 
two groups resemble each other in the sexual similarity of the femora, 
and the square apex of the eighth abdominal segment. Points of dif- 
ference for Gomphurus are : Abdominal segments 7 — 9 greatly dilated, 
the posterior genital hamule of the male perpendicular. Of the four 
species of this group none has as yet been found within the state, but 
from the fact that three have been taken in Towa and Illinois and the 
fourth in the Upper Peninsula of Michigan we can conclude that they 
likewise inhabit the waters of Wisconsin. 
1. Face banded with black 2 
Face entirely yellow ventricosus 
2. Sides of hind femora black 3 
.. Sides of hind femora yellow amnicola 
3. Segments 3 — 10 of abdomen with basal rings and lateral spots ; 
basal spots on dorsum of segments 8 & 9 scudderi 
Segments 3 — 6 of abdomen with sides black, markings dorsal, 
no basal rings dorsum of 8 & 9 black vastus 
