SYNOPSIS OF THE ORTHOPTERA OF WESTERN EUROPE, -13 



3. Anal segment cf with hinder border swollen 



and bent down ; forceps ^ toothed at base 2. sinuata, Germar. 

 3.3. Anal segment ^ not swollen, with 2 tuber- 

 cles ; forceps tf toothed in middle . . 3. orsinii, Gene. 

 1.1. Elytra not free, transverse. 



2. Abdomen broadest in middle. 



3. Pygidiiim <? vertically produced as a long 



blunt cylindrical lobe . . . . . . 4. acanthopygia. Gene. 



3.3. Pygidium ^ hardly produced, and not ver- 

 tically . . . . . . . . . . 5. MUTiCA, Krauss. 



2.2. Abdomen regularly dilated towards apex. 



3. Small size; pygidium produced, with 3 points 6. bolivari, Dubrony. 

 3.3. Size larger, stouter ; pygidium not prominent. 

 4. Branches of forceps cT long, smooth, 



shining enclosing an oval space . . 7. apteea, Megerle. 



4.4. Forceps d short, strongly bent in at an 



angle . . . . . . . . . . 8. pyhenaica. Gene. 



1. Chelidura analis, Rambui". 



Recognisable by its free elytra and subanal plate produced in the 

 form of a triangle. It is one of the smaller species ; the forceps of 

 the (? are toothed on both sides, and curved in a semicircle or undulated 

 oval. Length of body, 7mm. -9mm. <? , 8mm. -9mm. 5 ; of forceps, 

 lmm.-3-5mm. <? , 1'5 mm. $ . 



Found under stones in the Sierra Nevada, and Granada. 



2. Chelidura sinuata, Germar [ = dufourii, Serville). 



Black ; easily known by the end of the anal segment, which is 

 produced and strongly bent vertically upwards. The forceps of the 

 (? have a strong tooth on the inner margin near the base, and are 

 then bent in a semicircle forming the var. dufourii ; in the type form, 

 they are elongate, and bent downwards as in Anechiira bipimctata. 

 Length of body, 8mm. -13mm. <? , 7mm. -9mm. 5 ; of forceps, 

 3-7mm. S' , 2*5mm. ? . 



The two forms occur together under stones at a high elevation, 

 or under moss lower down, in certain mountains of France and Spain, 

 chiefly in the Pyrenees. In France — Pic du Midi de Bigorre, Cirque 

 de Gavarnie, les Cauterets, Pic de Saulcy in Auvergne, Port de 

 Venasque near Bagneres de Luchon, Tarbes. It occurs also in the 

 Spanish Pyrenees, at Panticosa. 



3. Chelidura orsinii. Gene. 



Elytra free, but subanal plate not produced ; anal segment not 

 strongly developed, with two tubercles. Forceps of ^ toothed in 

 middle. Length of body, 10mm. -12mm., (? , $ ; of forceps, 4-5mm. 

 (? , 2-5mm. $ . 



An Italian species ; Ascoli, Florence, Lower Abruzzi. 



4. Chelidura acanthopygia. Gene. 



Easily recognisable by the subanal plate of the S^ which is 

 produced and bent strongly backwards and upwards ; the forceps of 

 the (? are slender, unarmed, enclosing an oval. Length of body, 

 6mm.-13miii. J , 9mm. -11mm. ? ; of forceps, 3-.5mm. J , 2mm. 2 . 



Found in the northern and mountainous regions of Central Europe. 

 In France, near Paris, Fontainebleau, Marly, Vosges, Versailles, 

 Meurthe-et-Moselle, Pic du Midi de Bigorre, Decines near Lyon. 

 In Belgium it is recorded from Pepinster, Theux, Barisart near Spa, 

 Groenendael, Rouge-Cloitre, Waterloo, Tilli' near Liege, and also in 



