1910] Forbes—Aquatic Caterpillars dal f 
SYNOPSIS OF THE Pupm or NYMPHULA. 
The three open spiracles equal in size; ninth abdominal segment with 
a median longitudinal carina below. 
With but one median longitudinal carina .......... (subgenus Nympheella 
Cocoonstons Nymphreacesstey eras Hees eee N. maculalis 
With seven longitudinal carinz on a transverse ridge... . (subgenus Paraponyx 
‘ onsVallisnenias eles: oes soccer aoe N. obscuralis 
Cocoons floating : : 5 
on) Limnanthemumibeen eerie ae N. seminealis 
Unknown, possibly submerged.......... N. badiusalis and N. allionealis 
The first open abdominal spiracle distinctly smaller than the other 
two; no distinct median carina on ninth segment below 
(subgenus Hydrocampa 
Cocoon floating, nearly circular 
Pupa pale yellow; first open spiracle much smaller than the 
Othertwo:skotamoretone cette ee ioe ee oes secede: N. obliteralis 
Pupa bright yellow; first open spiracle hardly smaller than the 
otherstwoseNivamp hea ee) ney: hea spon ianee Setters oe N. gyralis (?) 
Cocoon submerged, oblong; first open spiracle much smaller than 
the other two; on Potamogeton and Menyanthes.......... N. icciusalis 
UU ea kcea wasps ack syne Pas ese sere At ae RAE N. ekthlipsis 
Bibliography. 
Dyar, H. G.: Jour. N. Y. Ent. Soc. xiv, 77, with full bibliography, and 
descriptions. 
Packard, A. S.: American Naturalist xviii, 824. Caterpillar of N. icciusalis. 
Hart, Bull. Il. St. Lab. Nat. Hist. iv, 167. Caterpillars of N. obscuralis and 
N. obliteralis. 
Zool. Jahrb.: Ab. Syst. vi, 626. Caterpillars of European and exotic species. 
Spuler, A.: Schm. Eur. ii, 221. The European Caterpillars. 
