12 Transactions of the Society, 



is really the only character which has separated the two groups, 

 and this is inadequate. 



In the Anechuriywe, in the broader sense, as in most of the 

 Forficulinse, Opisthocosmiin/e, and probably in the remaining 

 allied genera, the metaparameres are parallel-sided, narrow, and 

 apically rounded. 



The most important feature in this group is the reniform 

 vesicle of the virga. We find every gradation from the simple 

 vesicle, with direct junction, in Isolahella, to tlie complex structure 

 of Chdidurella , with its abruptly-elbowed virga, and strong and 

 large chitin-plates. The genitalia offer no particular distinction 

 from those of the Forjiculinx. In Burriola euxina Serv. the meta- 

 parameres are typically Forficuline ; virga barely twice as long as 

 reniform vesicle, which is reinforced on the concave side by two 

 chitin -lobes (PI. II, fig. 18). 



Subfamily FoKFicuLiN^. 



I can find no character in the genitalia confirming the separa- 

 tion of these two intimately-related groups, and fully confirm 

 Zacher's observation as to the close relation between them and the 

 Anechurin/v. 



We find the metaparameres generally more or less parallel- 

 sided, simple, long, and rounded at the apex ; the virga is of very 

 varying length, invariably provided with a reniform basal vesicle, 

 usually armed with chitin-plates of varying size and design. 



In Apteri/gida cavalli Bor. the manubrium is longer than broad, 

 narrowed apically, and rounded at the tip. In F. auricularia L. it 

 is similar, but a little shorter, broader, and less rounded at the tip. 



Chelidurella acanthopygia Gene. 



Vesicle figured by Zacher, fig. 12, who describes the genitalia 

 as of the highest and most complex type in the Eudermaptera. The 

 virga is doubled back on itself at the junction, and there is a broad 

 and iiTegular chitin-plate. 



