146 GSDIPODIX.'E. 



Acnjdium, Latreille {nee Geoftroy), Hist. Nat. Crust. Ins. iii, 1802, 



p. 282 ; xii, 1804, p. 149. 

 Pachytylus, Fieber, Kelch, Grimdl. Kemitn. Orthoiat., 1852, p. 5. 



Type, Onjllus Locusta migratorius, L. 



Range. Old World. 



Size large. Autennae longer than the head and pronotum. 

 rastigium of the vertex broad, not depressed, subcarinated, 

 passing over into the frontal ridge, which is broad and hardly 

 sulcated. Pronotum more or less constricted in front, strongly 

 ridged ; the carina hardly intersected by the principal sulcus, 

 which is placed about the middle and angiilated behind ; deflexed 

 lobes with the hinder edge very slightly ssloping. Tegmina very 

 long, subhyaline, more or less stippled with brown ; wings hyaline, 

 with no dark central band. All the tibia? spinose, hind femora 

 hardly serrulated. Pectus broad, pilose, mesosternal lobes with 

 the inner margins nearly straight, metasternal lobes widel}^ sepa- 

 rated. Pirst segment of the abdomen with the tympanum slightly 

 exposed. 



Keg to the Species. 



Hind femora very slender migratoroides, R. & F. 



Hind femora rather stout danica, L. 



1G9. Locusta migratoroides, R. t|- F. 



CEdipoda iiiiyratoroides, Reiche & Fairmaire, Ferret & Galiuier, 

 Voy. Abyssinie, iii, 1847, p. 430, pi. xxviii, fig-. 12. 



Paclii/tglus migratoroides, Saussure, Mem. !Soc. Geneve, xxviii (9), 

 1884, pp. 119, 120. 



Greenish brown, or reddish brown ; head generally with a slender 

 pale line beliind the eyes, bordered with reddish brown, and con- 

 tinuous M'ith a broad parallel-sided reddish-brown band on each 

 side of the pronotum. Pronotum granulated, constricted from a 

 little behind the liead to the middle. Tegmina niottled and reticu- 

 lated with brown ; wings hyaline. Hind femora rather long, not 

 much thickened at the base, and regularly tapering. Hind legs 

 brownish yellow , with the lower, and sometimes the upper, part 

 of the femora reddish. 



Length 42-4G mm. ; tegmina, 4G-60 mm. 



Widely distributed throughout the Old World, except Europe. 



170. Locusta danica, L. 



Gryllus Locusta danicus, Linnaeus, Syst. Nat. (ed. xii.) i (2), 1767, 



p. 702. 

 Pachytyhis danicus, Aurivillius, Ent. Tidskr. xxi, 1900, pp. 246, 



247. 

 Gryllus cinerascens, Fabricius, Spec. Ins. i, 1781, p. 3G9. 



Green or brown, banded with brown. Behind the eye runs a 

 brown stripe, generally intersected by a white line on the head 



