4] 
markings on the darker ground-color; outer api- 
cal angle of lateral labial lobes not rounded. 
ee. Hind angles of head prominent; quite young exam- 
ples (7 mm.) with separate spots at the posterior 
ocelli, the body not transversely banded. 3. sp. (a). 
e. Hind angles of head rounded; young examples (10 
mm. or less) with a trilobed spot at the back of 
the head above, the metathorax, a V-shaped spot 
on the base of the abdomen, and segments 6 and 
7, all pale.* 4. sp. (). 
d. Superior appendage fringed laterally with blackish 
hairs; posterior part of head pale, with a dark lateral 
stripe, a median pair of dark spots, and the poste- 
rior margin dark; outer apical angle of lateral labial 
lobes narrowly rounded; head behind the eyes short. 
5. californica. 
c. Apices of lateral labial lobes exteriorly broadly curving 
to the acute terminal hook at the inner apical angle, 
not contiguous when closed; color dark brown, a fine 
median pale line on labrum, a transverse spot at the 
anterior ocellus, behind which are two pairs of small 
spots; a fine median whitish line on thorax and abdo- 
men, vanishing near the middle of the abdomen. 
6. verticalis. 
1. 2schna clepsydra Say. 
E-schna eremitica Cabot (nymph). 
This wide-spread species has been found in the northern 
part of Europe and Asia, but especially in North America, ex- 
tending south as far as the Dakotas, Wisconsin, Indiana, north- 
ern Ohio, and Maryland. It has not been taken in Illinois. Walsh 
reported it from Rock Island (’62, p. 397), but Hagen has iden- 
tified Walsh’s specimens as rerticalis. A number of clepsydra 
imagos were taken, however, by Mr. Hart at the southwest end 
*In the young Avax junius the anterior pale transverse band includes the last 
two thoracic and the first three abdominal segments, and the posterior band covers 
segment 8, often also 7, and sometimes even the adjacent part of 6, 
