REPORT OF THE STATE ENTOMOLOGIST I907 263 
g The anterior or first pair of hamules in the phylogenetic 
series show themselves to be aS of the anterior 
lamina. 
10 Among the Libellulinae two pairs of hamules are not 
found, but as compensatory organs the genital lobes are very well 
developed. Genital lobes are not found where the first or anterior 
pair of hamules is well developed. 
11 Among the Anisoptera, the Aeschnidae and the Gom- 
phidae have a very highly specialized condition of the 2d seg- 
ment while. the Libellulidae represent the other extreme. The 
Cordulegasteridae seem. to be transitional in some respects be- 
tween the two. 
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