REPORT OF THE STATE ENTOMOLOGIST I907 263 



9 The anterior or first pair of hamules in the phylogenetic 

 series show themselves to be developments of the anterior 

 lamina. 



ID 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. 



II Among the Anisoptera, the Aeschnidae and the Gom- 

 phidae have a very highly specialized condition of the 26. 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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NOTE. Figures of the appendages herein discussed will be found in 

 the systematic papers of Calvert, Forster, Hagen, Kirby, Martin, Need- 

 ham, Ris, Williamson and other writers on Odonata. 



