102 Bulletin Wisconsin 'Natural History Society. [Vol. 6, Nos. 1 — 2. 
cingulata — differing- from the preceding- by the superiors, inferiors 
similar. 
alhlcincta — a basal tootli, an inferior median tooth. 
walshii — an external obtuse prominence at the basal third. 
elongata — apices upturned, an inferior basal tooth. 
Somatochlora elongata Scudder, Proc. Bost. Noc. Nat. Hist. 10, 
p. 218, 186; llagen, Proc. Bost. Soc. Nat. Hist. 18, p. 58, 1875 (Bibllog-- 
raphy) ; Needham, Bull. 47 N. Y. State Mus. 499, 1901 (Description of 
nymph) . 
Abd. male and female 42 — 45 ; h. w. 36 — 38. 
]\[ale. — ^Metallic g-reen and brown, marked Avith obscure yellow. 
Lower part of face brownish, frons and vertex dull green. Thorax 
metallic green, an obscure brown spot on each side of the dorsum near 
the anterior edge. Legs black, fore femore brownish above. Wings 
hyaline, stigma black. Abdomen blackish green, dilated at base, 
sharply constricted at 3, then gradually Avidening to 6, equal in width 
to the first segments. Seg-ment 2 with a spot on either side of dorsum 
and sides, 3 with a basal spot, luteous or obscure yellow. Appendages 
black. 
Female. — Similar. Abdominal segments 1 and 2 and base of 3 
broAvnish. Wings sometimes AAdth a smoky tinge about the nerAnires. 
Vuhar lamina as long- as 0, forming- a triaugular trough at right 
angles to the sternum of 9. 
Life Zone : Transition. 
Wisconsin: "Upper Wisconsin River" (Hagen). 
Time and Habitat — July to September along- streams and about 
lakes. 
EPICORDULIA Selys, Bull. Ac. Belg. 30 (2), p. 259, 1871. 
The single species of this genus is easily recognized by its 
large size and the spots at the base, the nodus, and the apex of all 
the wings. In the markings of the wings it resembles certain 
lyibellulinse, such as Libellula pulchella, differing, however, from 
that species by the longer body and other characters referred to 
in the table. The imagoes, restive in flight, prowl about slow or 
standing waters. 
Epicordulia princeps Hagen, Syn. Neur. N. Am., p. 134, 1861 ; Need- 
ham, Bull. 47 N. Y. Sate Mus.. p. 488, 1901 (Bibliography & Desc. of 
nymph) . 
Abd. male 44, female 46 ; h. av. male 41, female 44. 
Male. — Colors olive or brownish yelloAV, marked AAdth yelloAv. Face 
olive. Thorax Avith gray or broAvnish hair. Sides Avith an obscure yel- 
loAV stripe margined on the anterior side AAith fuscous. Legs black, 
the femora broAvn. Wings hyaline, nervure black, costa and stigma 
black, broAvn spots at the base, the nodus and apices of all Avings, the 
spots larger on the hind Avings. Abdomen dari< broAvn, most of seg- 
ment 1 and 2 and sides of 1 — 8 AA'ith yelloAv, segment 9 and appendages 
black. The superior appendages Avith tAvo obtuse internal prominences, 
at the basal and the apical third. 
Female. — Similar, vulvar lamina bifid, forcipate, nearly as long as 
the sternum of 9. 
