8 



BRITISH OETHOPTERA. 



An insect, Baseopsis forficulina, lias been obtained 

 from the Lias in Switzerland,* but entomologists 

 generally do not consider it to be an earwig. Above 

 the Chalk, however, in Tertiary formations of Oligo- 



d f- \- 



ur /- 



m.1 



...-a 



FIG. 1. Dorsal view (A) and ventral view (B) of a generalised male 

 earwig-. A. fr, frons ; e, eye ; o, occiput ; pn, pronotum ; el, elytron ; 

 w, wing-tip ; 1, 2, 3, tarsal segments ; cl, claw ; pu, pnlvillus (seldom 

 present) ; 4-10, last seven segments of abdomen. The 3rd and 

 4th segments carry scent-folds as indicated. B. mp, maxillary 

 palpus ; a, antenna ; pr, prosternum ; ms, mesosternnm ; mt, meta- 

 sternum ; /, femur; ti, tibia ; ia, tarsus ; 2-10, last nine segments 

 of the abdomen ; py, pygidium ; c, callipers. 



cene and Miocene times, earwigs certainly occur, and 

 Scudder has not long since described a dozen species 

 of one genus from the Lower Miocene beds of Floris- 

 sant alone. Not seldom the wings were expanded, 



* < Die Urwelt der Schweiz,' by Prof. Oswald Heer, 1865. 



