— i6o — 



The following is a list of his papers : 

 1862. -Beschreibung neuer Sjnnnen au> den Holilen von Desina (Verhandl. der zool. 



bot. Gesellscli. Wien\ 

 1863. — Beschreibung neuer Spinnen (Verhandl. der zool. bot. Gesellsch.). 

 1863.— Beschreibung neuer ArtenderFam. Orbitelse im Sitzungsber. d. Isis, Dresden. 

 1865.— Beitrage zur Kenntn. der Orbitelre, Verhandl. der zool. bot. Gesellsch. Wien. 

 1876. — Ueber amerik. Spinnen der Citigradte, " " " " " 



1877. -Amerik. Spinnen der Fam. Phoicidse, Scytodoidse und Dysderoidre, Vtrh. d. 



zool. hot. Ges-'llsch. Wien. 



1878. — Spinnen aus Uru.^uay und anileren Gegenden Amerikas, I, II, III. Verh. d. 



zool. but. Gesellsch. Wien. 



1879. — Spinnen aus Amtrika, I. Veihandl. der zool. bot. Gesellsch. Wien. 

 1880.— " " " II. " " " " " 

 1880. — Die Spinnen Amerikas — Laterigrada:. 



1881.— Neue Spinnen aus Amerika, III, Verhandl. der zool. bot. Gesellsch. Wien. 



1882.— " " " " IV, 



1883.— " " " " V, 



1884.— " " " '• VI, 



1884. — Die Spinnen Amerikas — T^/'/.r/Vm/rt', I. 



1886.— '♦ " " Thcridiidcv, II. 



1887. — Neue Spinnen aus Amerika, VII. 



Since 1 881 Count Keyserling undertook the continuation of Dr. Koch's "Die 

 Arachniden Australiens. " 



Washington, D. C, Jjily isl. Geo. Marx, jNI. D. 



There has been considerable objection to the use of shellac for 

 mounting 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. INIr. 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 

 belter 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. 



