973 
NOTES ADDED IN PRESS. 
Hydroporus niger, Say (No. 622), and Hydroporus dichrous, Melsh. (No. 620).—There is considerable 
doubt whether I have correctly identified these two species, and it will be found an advantage therefore 
that the original descriptions are also reproduced, (Nos. 1494 and 1361, respectively.) 
Hydroporus orientalis, Clk. (No. 287).—The identification of the species described under this No. 
with Clark’s description is an error: the insect Clark had in view was a species of Hydrovatus ; Clark’s 
description is given in the Appendix, No. 1411. The name of No. 287 should therefore read ‘‘ Bidessus 
orientalis, n.sp.,” and “ Clk., M.C.,” should be deleted. 
Hydrovatus maculatus.—This name occurs in the appendix of unrecognized descriptions (No. 1452), as 
well as in the body of the memoir (No. 182); although this is the result of negligence on my part, I do 
not think it necessary at present to propose an alteration in the name of No. 182, for it appears to me 
possible that the two descriptions may really pertain to the same species. 
Dytiscus obscurus.—This name is twice used, viz., for Nos. 130, and 782; priority gives the name to 
No. 130, and No. 782 will therefore take the name of Colymbetes quadriguttatus, Lac. (Faun. Ent. Par., 
p. 316.) 
Dytiscus interruptus.—This name also is twice used, viz., for Nos. 128, and 1066; for the latter 
species therefore the name ‘“ Acilius interruptus, Aubé,” may be adopted. 
Redtenbacher (Reise Novara, II, p. 23), records the occurrence of Eretes (Hunectes Redt.) in New 
Zealand. This, if correct, would be of considerable interest ; but as errors so frequently occur from the 
fact that voyaging collectors visit Australia and New Zealand in one voyage, the record must be corrobo- 
rated before being relied on. 
Since my paper was read to the Society, I have received from Dr. John Sahlberg a copy of his impor- 
tant memoir on Siberian Coleoptera, “ Bidrag till Nordvestra Sibiriens Insektfauna, Kong]. Svenska vet- 
ak. hand.,” vol. 17, No. 4. (The extract bears date 1880, but I believe was not published till the 
iniddle of 1881.) This work records a considerable number of species of Dytiscide found by the author 
during his travels in these regions in 1876 and 1877. A considerable portion of these are recorded in 
my paper, Dr. Sahlberg having been so kind as to forward me beforehand a list for the purpose. Several 
new species are described in the memoir, viz., Coelambus unguicularis, Hydroporus intermedius, Hydro- 
porus punctipennis, Hydroporus wnescens, Hydroporus pectoralis (nec Motsch.), Hydroporus obovatus, 
Hydroporus sibiricus, Gaurodytes punctipennis, Gaurodytes nigripalpis, Gaurodytes amnicola, and Gauro- 
dytes sloyzovi . . . . Ofthese Coelambus unguicularis—C, sahlbergi, No. 407, huj. op. Sahlberg’s name 
612 
