—Too— 
The following is a list of his papers: 
1862, -- Beschreibung neuer Spinnen aus dcn Hohlen von Desina (Verhandl. der zool. 
bot. Gese!lsch. Wien. 
1863. —Beschreibung neuer Spinnen (Verhandl. der zool. bot. Gesellsch.). 
1863.—Beschreibung neuer Arten der Fam. Orbitelze im Sitzungsber. d. Isis, Dresden. 
1865.—Beitriige zur Kenntn. der Orbitelee, Verhandl. der zool. bot. Gesellsch. Wien. 
1876.—Ueber amerik. Spinnen der Citigrade,  “ os Hs ¥§ st 
1877. —Amerik. Spinnen der Fam. Pholcide, Scytodoidz und Dysderoide, Verh, d. 
zoo]. bot. Gesellsch. Wien. 
1878.—Spinnen aus Uruzuay und anderen Gegenden Amerikas, I, I, III. Verh, d. 
zool, bot. Gesellsch. Wien. 
1879, —Spinnen aus Amerika, I. Ve:handl. der zool. bot. Gesellsch. Wien. 
1880.— “ 2% = de + 2 i cr RS 
1880, —Die Spinnen Amerikas—Laterigrade. 
1881.—Neue Spinnen aus Amerika, III, Verhaadl. der zool, bot, Gesellsch. Wien. 
1882,— << 66 “c iG live 6 ‘ec ‘. “6 66 
1883, — ce 6c ce a3 V és (73 ‘ec 3 “cc 
? 
1884, — &e ‘ss 6c it VI ‘“ “é ‘6 ‘6 66 
> 
1884. —Die Spinnen Amerikas— 7heridiide, I. 
1886. — ‘¢ 6 6 Theridiide, Ml. 
1887. —Neue Spinnen aus Amerika, VII. 
Since 1881 Count Keyserling undertook the contiauation of Dr. Koch’s * Die 
Arachniden Australiens.’’ 
Washington, D. C., July rst. Gro, Marx, M. D. 
TuerE has been considerable objection to, the use of shellac for* 
mounung insects, especially duplicates, because of the difficulty of dis- 
solving the shellac if it is desired to re-mount the specimen. Alcohol 
acts very slowly, and sometimes boiling in alcohol is necessary, especially 
if the shellac be impure, or the specimen very dirty. Mr. Lugger has 
suggested a remedy which we have tried and found excellent. Pin the 
specimens on the underside of the cork of a wide-mouthed bottle con- 
taining chloroform, and in a short time the vapor of the chloroform will 
absorb the shellac, leaving the specimens lying loosely on the cards. We 
have found shellac much the most satisfactory medium for mounting. 
We get the ordinary commercial white shellac varnish, put a little of it 
into a small shallow bottle and let it evaporate to the proper consistency. 
If it gets too thick, a little alcohol will remedy that. For repairing in- 
sects nothing sets so quick or holds so hard. 
It does not seem to be generally known that chloroform is by far 
better than benzine for cleaning greasy specimens, both Coleoptera and 
Lepidoptera, ‘They can be safely submerged in it without injury. To 
clean old dirty beetles put them in hot water, let it come to a boil, and 
with a brush wash carefully—then put into chloroform, and when your 
specimen is re-mounted it is just as good as new. Only—you cannot 
use that process more than once. It takes a little judgment in applying, 
and especially in the boiling, for an overdose would result in a separation 
of all the parts. 
