16 THE ENTOMOLOGICAL CODE, 
72. In case of minute insects cr acari where more than one speci- 
men is mounted on a slide one should label but one slide as the type 
slide, and if there is doubt or a mixture of species it shall be treated 
as a case where the author has labeled more than one specimen as 
type. 
73. The following rules apply for the fixation of types of species 
in the order given: 
A. AutTHOR’s FIXATION IN THE ORIGINAL DESCRIPTION. 
a. If a specific name is based on but one specimen, that specimen 
is the type. 
6. If an author labels or, in the original description, designates a 
certain specimen as type, that specimen is the type. 
c. If an author in the original description designates a series or 
collection of specimens as type, then the type is among such desig- 
nated material. 
Note—Obvious errors or transposals of labels are sufficient 
grounds for disregarding rules 6 and c. 
B. Fixation By OTHERS THAN THE AUTHOR, OR BY THE AUTHOR 
SUBSEQUENT TO THE ORIGINAL DESCRIPTION. 
d. A specimen to be chosen as type must be. found among ma- 
terial presumably examined by the author at the time of its descrip- 
tion. 
e. The type shall not be selected from among material indicated 
in the original description as variational or aberrational, nor from 
material doubtfully included in the species. 
f. If it is anywhere stated in a work that a new species described 
therein is based on material wholly from a source other than the 
author’s own collection, the type is to be selected from among such 
material, 
g. If there are distributed to two or more collections specimens of 
a species all labeled by the author as types, or none labeled as types, 
the type should be selected from the specimens retained, if any, in 
the collection of the author. In case of a joint work the first author 
has precedence. 
h. If two or more species are included in the original series of 
specimens upon which a new species has been based and the author 
