1908] 
MuttkowsJd, Dragon Flies of Wisconsiii. 
85 
as follows : a dorsal stripe on segrnents 1 — 2, a hastate spot covering" 
the basal third of 3, a small basal triangular spot on 4 — 8, often obso- 
lete. 9 and 10 are black. Sides of 1 — 3 largely yellow, margins of 
7 — 9 slightly marked with yellow. These latter segments are some- 
what expanded. Segment 10 is very short, hardly one-third the length 
of 9. Appendages widely separated, black. Wings hyaline, nervure 
black, costa black, the pterostigma brown. 
Female. — Similar. Front femora green beneath. Segments 4 — 7 
of abdomen with small basal lateral spots yellow. 
Life Zone : Transition. 
Wisconsin: Vilas Co., Divide, June 24-30, 1007. 
Time and Habitat — May to July about lakes, ponds and creeks. 
Qomphus quadricolor Walsh, Proc. Ent. Soc. Fhila. 2, p. 248, 1863 ; 
Kirby, Synonymic Cat., 1890; Needham, Bull. 47 Y. State Mus., 
p. 452, 1903 (Bibliography). 
Abd. male 32, female 33 : h. w. male 26, female 27 — 28. 
Male. — Olive and black. Dorsum of thorax with middle stripe 
short, widening in front, the humeral and antehumeral connected at 
both ends. Legs black. Abdomen black above, a stripe on 1 — 3, and 
small basal spots on 4 — 8 yellow. Sides greenish on 1 — 2, 8 — 9 yellow. 
Wing's hyaline, costa yellowish, stigma brown. 
Female. — Similar. Vulvar lamina short, emargine, the lobes 
rounded. A female in the Museum collection has the occiput of vastus, 
namely deeply excised, and its otherwise marked like ventricosiis, seg- 
ments 8 — 10 of the abdomen black on the dorsum. But from the latter 
it is readily distinguished by the presence of two cells between veins 
Al and A2 at their origin, and likewise by the rounded lobes of the 
vulvar lamina, which are pointed in ventricosiis. Also the sternum of 
8 is produced in two lobes at the apex, so that the two pair of promi- 
nences appear superimposed. 
Life Zone : Upper Austral. 
Wisconsin : jMilwaukee Co., jNIilwaukee River, June 2, 1902. 
Time and Habitat — May and June about rapid streams. 
Qomphus sordidus Hagen, Bull. Ac. Belg. 21 (2), p. 244, 1854 ; Syn. 
Neur. N. Am., p. 106. 1861 ; Needham, Bull. 47 N. Y. State Mus., p. 454, 
1901 (Bibliography & Desc. of nymph). 
Abd. male 38, female 37 ; h. w. male 32, female 33. 
Male. — Olive, brown and black. Face and occiput olive, the occiput 
margined with black. Thorax with a broad mid-dorsal stripe not 
reaching the prothorax, wider in front. Humeral and antehumeral 
connected at both ends, enclosing a narrow olive stripe. Legs black, 
the fore femora olive below, all the tibiae olive externally. Abdomen 
black, marked with olive. A mid-dorsal stripe on the basal segments, 
reduced to dashes on 4 — 9, 10 and the appendages usually yellow above 
or brown. Sides of 1 — 3 and 8 — 9 greenish yellow, basal spots on 3 — 7. 
Stigma of wings brown, costa olive. A specimen in the Museum collec- 
tion has segment 10 of the abdomen and the appendages black, but the 
appendages have the same form as the typical sordidus. 
Female. Similar. With more yellow on the abdomen and thorax. 
The vulvar lamina short, bifid. The female has great similarity to 
spicatus and furcifer. From the latter it is readily separated by its 
brown instead of black color, and also by the olive exterior surface of 
