Revision of the Notonectide. 421 
8 (1) Scutellum black or luteous. Metanotum orange-yellow with 
a large blackish blotch close to the scutellar margins. 
Abdominal dorsal segments: first orange-yellow, second 
to fourth black (the fourth narrowly orange-yellow 
apically), fifth to eighth orange-yellow (the fifth basally 
blackish). Alar basal nervures orange-yellow. 
5 maculata, Fabr. 
Var. 1, glauca, L. 
Hemielytra varying in colour from pale sage-green or stra- 
mineous to rich dark castaneous, either practically immaculate 
[when castaneous presumably var. fulva, Maria] or varyingly 
maculate with irregular blackish mottlings and spots. Alar 
nervures pale yellowish-brown. 
I have taken small examples of this variety in brackish 
water near Gravesend (England) in company with marine 
Crustacea. From Maie-Nousky, Erzerum (Vienna Mus.), 
I have seen two specimens resembling in colour and dis- 
position of the apical hemielytral fascia, the typical 
form of N. americana, Fabr. 
Var. 2, marmorea, Fabr. (ylawca, var. 8, Leach). 
Rich yellow-brown hemielytra with dark mottlings ; connexivum 
greenish testaceous. 
This var. has been confused with maculata, Fabr., and 
I have received a number of the latter labelled ‘ mar- 
morea,” indeed, as regards the hemielytral pattern and 
coloration, some forms of each variety are quite indis- 
tinguishable from each other. This has been fully 
discussed in the Revue d’Entomologie, xvi., p. 222 
(1897). 
Var. 3, marginata, Miill. (fwrcata, auctt.). 
Hemielytra bluish-black or dull black ; clavus luteous except at 
the sutural margins; a longitudinal luteous fascia, varying in 
length, at the base of the endo- and mesocorium ; in many in- 
dividuals there are one or two ferruginous spots near the apical 
margin of the corium ( furcata, var. 8, Leach). 
Among the intermediate forms between vars. 1, 2, and 
3, may be mentioned : 
(a) specimens from Sind Valley, Kashmir (Budapest 
and Stockholm Muss.). 
