BRITISH ORTHOPTERA. 



fuscis. Abdomen medio dorso fuscum. Segmentum ultimum magnum, 

 durum, pallide gryseum, margine postico inter forfices bidentato. 

 Forfices rectiusculi, subulati, apice fuscescentes, dente unico circa 

 medium. Pedes et antennae pallidissima. Habitat in ripis praeruptis, 

 arenosis, prsecipue ad Irtin copiosissima, canalibus horizontalibus 

 latens. (Pallas, ' Reise versech. Prov. Russ. Reich.' II, Anhang, p. 727 r 

 1773.) 



MALE IMAGO (PL III, fig. I). --Size very large. 

 General colour pale greyish ochre ; under surface pale, 

 except abdomen which is the same as that of the 

 upper surface. (Being of this dirty cream-colour, 

 with darker markings in places, these earwigs are 

 extremely well protected by resemblance to the sand 

 on which they live in their British habitat.) The 

 head pale ochreous ; eyes dark brown ; antennas 

 yellowish, of 27-30 segments ; pronotum brown, with 

 pale margins and centre. Elytra (closed) with a large 

 orange-yellow V on a brown ground; sides pale; 

 small iving-tips pale with a darker centre ; legs very 

 pale. Abdomen with a mid-dorsal, darker, interrupted, 

 longitudinal band ; surface rather rough ; last segment 

 with a projection above the insertion, of each branch 

 of callipers and with two points between them. Legs 

 of callipers bowed and bearing internally a tooth 

 between the centre and the apex (fig. 2, no. 5) ; colour 

 ruddy-brown, dark towards the apex. Length, 19-30 

 mm. ; length of callipers, 8-13 mm. 



FEMALE IMAGO (PI. Ill, fig. 2).- -General coZowr as in 

 male. Mid-dorsal band more pronounced on abdomen. 

 No points between branches of callipers, which are 

 shorter and without tooth. Length, 25-28*5 mm. ; 

 length of callipers, about 6' 5 mm. 



NYMPH.- -One taken 12 Aug. 1914 was very pale, 

 the point of the face and the tips of the callipers 

 being slightly darker, and the eyes quite dark. In the 

 nymph the rudimentary wings show very distinctly. 



VARIATION AND ABERRATIONS.- -In these earwigs there 

 is much variation in size, build, and colour, and many 

 forms have been described as separate species. The 

 wings and teeth of the callipers may be missing. As 



