362 
ZOOLOGICAL LITERATURE. 
Bembidium {Philochthus) toletanum, Perris, 1. c. p. 277, from Aranjuez. 
Oillmum Jiaoescens, McLeay, Proc. Ent. N. S. W. 1863, p, xviii, found on 
the beach of Middle Harbour, Sydney, below high-water mark. 
DYTISCIDiE. 
General notes on the family : — 
ScHAUM lias published (Berl. entom. Zeitsclir. 1861, pp. 105 & 
106) a list of the speeies of Dytiscidce observed in the fresh 
waters of Egypt. They amount only to 21 ; but Schaum thinks, 
from the uniformity of conditions prevailing throughout the 
extra-tropical Nile- valley, and the thorough investigation which 
it has received, that the list will not receive many additions. 
The species are as follows : — 
I. Ilaliplus macidipenniSf n. sp. 2. Cybister roeseliL 3. Cybister africmms 
(Lap.)= C. mendionalis (Gcn<5) and C. ceyyptiacus (Peyron.); Schaum regards 
this insect as identical with the Indian C. tnpimctatus (01iv.) = C. lateralis 
(Fab). 4. C\ reichci (Aube) ; also from Senegal and the Cape, 5. Eunectes stic- 
ticus. 6. Ilydaticus leander(Ros,^\). 7. Colymbetes pidverosus(f>ii)] Schaum be- 
lieves C. australis (Aubd) to be identical with this species. 8. Ilydrocauthus 
notula (Erichs.) = //. diophthalmus (Keiclie). 9. Luccopkilus luridus, n. sp. 
10. Laccophilus pcecihis (King). 11. llyphydrus yrandis (Lap.). 12. Ily- 
droporus musicus (King). 13. II. turyulus (Erichs.). 14. II. cuspidatus 
((jferm.). 15. II cribrusus, n. sp. 16. II solieri (Aub6). 17. II. 2>(>f'catus 
(Klug). 18. II. confusus (King). 19. II. pentagrammus, n. sp. 20. II 
signalellus (Klug). 21. II ceresyi (Aub*?,). 
Notes on known genera and species : — 
Ilydaticus. According to Hamlet Clark (Ent, Trans. 3rd ser. vol. ii. p. 211), 
11. bihatnatus (Eschsch.) includes II. yoryi (Aub4) and II scriptus (Blanch.) j 
it ranges from the Philippine Islands to Australia. The same author states 
(1. c. p. 212) that II 4:~vittatus (Blanch.) is probably identical With II vittatus 
(Fab,). II. hander (Rossi), a southern European form of this genus, seems 
to be distributed over the whole of Africa y but Hamlet Clark has received 
specimens, differing from the ordinary type in some particulars, and which 
may prove to constitute a distinct species, from the White Nile (1. c. p. 217). 
Clark has received specimens, undistinguishable from II. grammicus (Sturm), 
from China and the Eastern Archipelago, Ilydaticus bivittatus (Lap.), a 
widely distributed species in S. Africa, exhibits considerable variation, as 
described by Clark (/. c. p. 218). II. staynalis (Fab.) occurs also at the Cape 
of Good Hope (Clark, 1. c. p. 218). 
Ilydroporus. Schaum indicates (Berl. entom. Zeitsclir. 1861, 
p. 112) that Hydroporus platynotus and its allied species form a 
peculiar group, distinguished by having the surface reticulated 
and dull, and the thorax and elytra with large punctures. To 
this group he refers 9 species, viz. : — 
II. latus (Steph.); II platynotus (Germ.); II depressieollis (Rosenh.); II. 
bicostatus (n. sp.) ; II. aubei (Muls.) ; II. lareynii (Fairin.); II. op>atrinus 
