208 ENTOMOLOGICAL SOCIETY 
CORRECTION TO: MONOGRAPHS OF THE DIPTERA OF NORTH AMERICA. 
VOL. I, WASHINGTON, 1862. 
BY C. R. OSIEN SACKEN. 
It is never too late to mend. It is now nearly 30 years since I published, 
in the above-named volume, a paper : On the North American Cecidomyidre 
(1. c., pp. 172-205); and it is only now that a passage in Fred. A. A. Skuse's : 
Diptera of Australia, Part I, Cecidomyidie (Proc. Lin. Soc. of N. S. Wales, 
Vol. iii, p. 45, Jan. 1888), draws my attention to an egregious blunder 
that I committed on pages 177 and 178 of that volume. Mr. Skuse is right 
of course, and in consequence the three last lines of page 177 should read 
thus: 
The upper branch of the fork forms a single smooth curve; $ antennae 
i6-jointed, verticillate, joints pedicelled. 
Antennae of the 9 lo-jointed, pilose, joints moniliform; wings like 
fig. 10. 
Cutoclm Hal id. 
Antennae of the 9 11-12 jointed, joints sessile ; wings like fig. 12. 
Lestremia Macq. 
On page 178, line 8 should be struck out: (Antenna; i6-jointed, etc 
Lestremia Macq.) 
Dr. Marx read a paper on " Some Spiders from the Galapagos 
Islands." These spiders were taken by the U. S. Fish Commis- 
sion steamer " Albatross " between April i and 15, 1888. Of 
the ten species collected four were new to science.* 
In the discussion of this paper Mr. Schwarz said that he fully 
agreed with a statement by Dr. Sharp, to the effect that the insect 
fauna of the Galapagos Islands was altogether too little known to 
define its character. No expert entomologist had, to his knowl- 
edge, ever visited these islands. 
Mr. Mann stated that according to his information one of the 
most distinct lines of demarkation between florae is that which is 
drawn between the florae of the west coast of South America and 
those of the Pacific islands. 
Mr. Schwarz then read the following paper : 
NOTES ON THE COMPARATIVE VITALITY OF INSECTS IN COLD WATER. 
BY E. A. SCHWARZ. 
The following fragmentary notes on the vitality of the different orders 
of insects when immersed in cold water are not based upon experimenta- 
*See Proc. U. S. National Museum, v. 12, 1889, pp. 209-210. 
