RHYNCHOTA. 
481 
and figures the antenna (fig. 5), and describes a new 'species. Frauenfeld 
refers to the statement of Eschscholtz that the anterior tarsi are triarticulate, 
the third joint being represented by the projection forming the inferior 
boundary of the notch containing the claws. In the author’s opinion this 
view is erroneous. 
Hydrometra costcB (Il.-Sch.) and II. odontogaster (Zett.) are described as 
occurring in Britain by Douglas & Scott (Ent. M. Mag. iv. pp. 96-98). 
Mesovelia furcata (Muls. & Bey) is described and figured as a British spe- 
cies by Douglas & Scott (Ent. M. Mag. iv. pp. 4-6, pi. 1. fig. 1). They say 
that it belongs to the group Hebrides. 
Wahnschaffe records the occurrence of Velia currem (Fab.) upon brack- 
ish water near Siilldorf. Berl. ent. Zeitschr. 1867, p. 192. 
Halohates ivullerstorffi, sp. n., Frauenfeld, 1. c. p. 468, pi. 12. figs. 1, 2, 6, 8, 
& 10, off Cape Frio. 
NoTONECTIDiE. 
Douglas & Scott (Ent. M. Mag. iv. pp. 98-100) describe Corixa prmusta 
(Fieb.) as a British species, and redescribe their C. wollasloni from mature 
examples. 
IIOMOPTERA. 
Marshall (Ent. M. Mag. iii.) has concluded his essay on the British spe- 
cies of Auchenorhynchous Ilomoptera, with a revision of the genus Eupteryx 
(Curt.) = Typ/i/ocyta (Germ.). He also adds a few supplementary notes on 
species described in previous sections of his work. 
Stridulantia. 
Landois^s observations (Zcitsclir. fiir wiss. Zool. xvii. pp. 152- 
158, pi. 11. figs. 17, 18) on the singing-apparatus of the Cicadee 
are particularly interesting, as demonstrating the incorrectness 
of the explanation of the singing of those insects given Reau- 
mur and since generally adopted, and at the same time bringing 
this phenomenon into relation with the buzzing of the Diptera. 
Landois describes the construetion of the parts concealed by 
the large subabdominal plates of the male Cicadm^ and already 
noticed by Reaumur and others, and indicates that the so-called 
timbale of Reaumur cannot act in the manner described by 
him, as, instead of. being moveable by muscular action, it is 
firmly attached to the wall of the metathorax. The true organ 
of sound, according to Landois, is the metathoracic stigma, 
which is ,of very large size and elongated form, and furnished 
throughout its length with two thin sounding-bands, which leave 
a very narrow slit between them. It is to the vibration of these 
bands during the escape of air from the tracheaj that the sound 
is primarily due ; the more external organs merely serve to in- 
crease its power by their resonance. 
FuLGORIDiE. 
SiGNORBT publishes some observations by Rouget of 'Dijon on the occur- 
rence of TeUigometra Iceta (H.-Sch.) on the lower surface of stones covering 
nests of Tapinoma erraticum. Bull. Soc. Ent. Fr. 1867, pp. Ixxxiii-lxxxiv. 
