116 



University of California Puhlicatiojis. [Entomology 



better with the paleontological evidence. The posteriors belong 

 wholly to the anal field, and are the veins modified for the 

 common anal foldings. 



FORFICULID.E. 



The earwigs possess a venation that is entirely uniform, as 

 far as known, l)ut remarkably different from anything known 



FIG. .W. The venation and folding of Forticulidaj. Tlie dotted lines 

 show the lines of folding. The black areas are those reversed in folding. 

 Letters are to identify areas. 



elsewhere. The general features of the venation have often 

 been figured, but the details necessary for the interpreta- 

 tion of the venation have never been shown. The whole 

 venation depends upon the very peculiar metliod of folding. 

 The wing is packed away into very small space in the 

 manner shown in Figs. 55 and 56. The piece A (Fig. 55) 

 is attached to the body in the manner in which wings are 



