The description of color plates I--X from Publication No. 4313 is as follows:
THE COLOR PLATES
There are seventy-three forms illustrated in the ten plates.
Each figure was outlined from a live specimen with the aid of a camera lucida and the details worked in by hand, using ink and pastels.
All figures were drawn to the same scale, and all have been reduced the same amount in the reproductions.
As they appear in the plates, the flies are magnified aproximately nineteen times.
The finished plates were made by The Lakeside Press of Chicago, Illinois, using a 4-color process.
The author believes that these illustrations will be of considerable help to collectors in identifying the different species of Drosophila,
especially when used in connection with the detailed taxonomic descriptions found in the text.
They are not intended to take the place of "type specimens" for the professional taxonomist,
although they do emphasize to advantage many details of structure and color which he employs in his work.
The types unfortunately are widely scattered in private collections and museums, and are not generally available except to the specialist on the group.
The description of color plates XI--XVI from Publication No. 4445 is as follows:
THE COLOR PLATES
There are thirty-five forms (species and subspecies) illustrated in the six color plates.
These plates represent a continuation of the series of the similar ones which appeared in Publication No. 4313 (1943), and are therefore numbered XI to XVI.
The method employed by Mrs. Martin in preparing the original pastels was the same for both sets of plates.
Hence, all figures were drawn to the same scale, and, as reproduced, the flies are magnified about nineteen times.
There are 108 forms shown on the sixteen plates.
Of this number 82 have been found in Mexico, 43 are common to United States and Mexico, 26 were collected in United States only, and 39 in Mexico only.
Note that the original scaling was lost during digitization of the illustrations.