1895.] The Affinities of the Lepidopterous. Wing. 709 
tion of vaccine in the laboratory, at some future time, when 
the work now in progress, has reached completion. 
‘Bacteriological Laboratory, State Board of Health. Des 
Moines, Iowa, February, 1895. 
EXPLANATION OF PLATE XXIX. 
Fig. 1. +¥°. Dispora variolz, two days old growth in 
Pasteur’s fluid. 
Fig. 2. “°°. Same; four days old. Specimen from surface 
film. 
Fig. 3. ca. “P^, Same; eight days old culture in bouillon. 
A few spore-bearing cells. 
Fig. 4. ca. °°. Same; eleven days old culture in bouillon. 
Spore-bearing cells numerous. 
Fig. 5. “S°. Same; 25 days old bouillon- culture. Some 
free spores; chains. 
Fig. 6. *t°. Same; one month old bouillon-culture. Cells 
almost disappeared ; free spores in excessive numbers. 
THE AFFINITIES OF THE LEPIDOPTEROUS WING. 
By Vernon L. KELLOGG. 
It has long been recognized that the venation of the wings 
of the Trichoptera and Lepidoptera is of similar general charac- 
ter; and recognized, too, although less popularly, that the 
genera Hepialus and Micropteryx display more clearly than do 
any other lepidopterous forms this general resemblance to the 
trichopterous venation. Speyer,’ in 1870, pointed this out in 
his discussion of the affinities of the Lepidoptera and the Phry- 
ganide. His too serious consideration of the many mere an- 
alogies apparent in any comparison of the groups did much 
1Speyer, A. Ueber die Genealogie der Schmetterlinge, Stettiner Entomolo- 
gische Zeitung, pp. 202-223, 1870. 
