SYNOPSIS OF THE ORTHOPTERA OF WESTERN EUROPE. 137 



The specific value of Bagous nigritarsis. — At Lewes, on April 

 4th, by sifting debris of dead reeds, etc., I secured two specimens of 

 Bayous nigritarsis, Thorns. This form would seem to be sufficiently 

 distinct from B. glabirostris, Hbst., to be considered as a good species, 

 and not only as a variety of the latter.- — Ibid. 



Synopsis of the Orthoptera of Western Europe. 



By MALCOLM BURR, B.A., F.L.S., F.Z.S., F.E.S. 



(Continued from p. 119). 



6. Olynthoscelis griseo-aptera, De G. 



( = cinereus, L.) 



Of smaller size ; brown, with blackish markings ; pronotum a 

 little narrower in front than behind, and truncated behind, flat above 

 in $ , subconvex in $ ; side flaps black, the edges paler, with an 

 extremely narrow pale border; elytra $ almost entirely free, grey, 

 with black sides ; in the $ , round and lateral ; abdomen chestnut 

 above, yellow beneath ; posterior femora with black markings ; cerci 

 S conical, straight toothed at the base ; ovipositor strongly incurved. 

 Length of body 13mm. -15mm. $, 15mm. -18mm. 5 ; of pronotum, 

 5mm. J, 6mm. $ ; of elytra, 3mm. -4mm. $ , -5mm. 5 ; of posterior 

 femora, 15mm. -17mm. 3 , 18mm. $ ; of ovipositor, 9mm. -10mm. ? . 



Common throughout northern and central Europe. In England 

 it is exceedingly common in the southern counties, and common in the 

 midlands, on brambles and thick hedges, in the late summer and 

 autumn. It occurs as far north as Lapland, and is common in 

 Sweden, where it is recorded from Vik near Upsala, in Skane at 

 Esperod, and Krugeholm ; in East Gottland, at Vadslena ; in West 

 Gottland, at Kunekalle, Bohuslan, and Calmare. In France it is 

 exceedingly common, especially in the northern departments; it 

 swarms in the Forest of Fontainebleau. It is common throughout 

 Belgium, and also in Switzerland. It is rarer in the south, but has 

 been taken in Piedmont at Susa, and in Spain, in the extreme north, 

 at Bilbao, Oha, near Burgos, in the Picos de Europa, and Collsacabra. 



Genus II : Platycleis, Fieber. 

 This is an important genus, containing nearly 30 species, of which 

 the majority are known to occur in western Europe, and three in 

 Great Britain. They are active insects, and frequent long grass, 

 thickets, shrubs, and hedges or heath land, and sometimes marshes. 

 The elytra and wings are perfectly developed, and sometimes abbre- 

 viated, but never quite rudimentary nor squamiform; the ovipositor is 

 flattened, and more or less curved ; the pronotum is flat, with a more 

 or less distinct keel in the posterior part of the disc ; the cerci of the 

 $ are toothed on the inner side, but this tooth is nearer to the apex 

 than to the base of the cerci. In this genus the ? s are more 

 important than the $ s for purposes of discrimination, as in a few cases, 

 the Js of two or three allied species, are practically indistinguishable 

 from each other. The form of the subgenital lamina of ? is the 

 most important character. 



Table of Species. 

 1. Subgenital lamina ? with a longitudinal sulcus, 

 roundly emarginate, the lobes rounded. 

 2. Seventh ventral segment 9 gibbous or keeled. 



