80S JOURNAL, BOMBAY NATURAL HIST. SOCIETY, Vol. XXVII. 



spinis extus intusque 9-10 armatae. Lamina subgenitalis J curta, apice 

 obtusissima. Cerci S compressi, laminae subgenitali longiores, pone medio de- 

 <;urvi, validissime compressi et dilatati. 



S (typus). $ (cotypus). 



mm. mm. 



Long, corporis . . 36 58 



„ antennarum . . 14, 5 18 



„ pronoti . . 8 11 



,, elytrorum . . 33 45 



,, femori postici . . 22, 5 32 



Eab. — Mesopotamia : Amara 25-5-18 (Dr. Buxton leg.) ; Ibidem, 8-6-18 

 ■(Mr. Evans leg.) 



Typus S et cotypus 2 in collectionem Musei Britannici ; una 5 cotypica 

 jn collectionem Miisei Ediburgensis. 



This splendid species is rather closely related to Th. littoralis, Ramb., as 

 is obvious from the resemblance of the lamina subgenitalis and cerci of male, 

 but it differs from the said species by the numerous characters— size, coloration, 

 number of spines at the hind tibiae, &c. 



Th. buxtoni is the fourth known palearctic species of its genus. The specimens 

 -taken by Mr. Evans were captured among grass and camel-thorn at Masharra 

 Canal, Amara. 



35. Thisoecetriis adspersus, Redt. — Amara, 13 — 30-6-18 (Dr. Buxton); above 



Amara, on Suceda, 17-6-18 ; 12 miles below Amara, on Acacia in dry 

 marsh, 12-9-18 (Mr. Evans). 



36. Thisoeceirns dorsatus, F.-W. — Amara, 25—30-6-18; Kazvin, 19-7-19 



(Dr. Buxton) ; among herbage, in garden above Amara, 21-6-18 (Mr. 

 Evans). — J. Bolivar in his recent publication *) regards Th. dorsatus 

 and Th. pterosticMis F.-W. as two different species, but I have proved f 

 by the study of the type specimens that the second name is a mere 

 synonym. 

 For separating four palearctic species of the genus Thisoeceirus the 

 follovv'ing key may be of some usej ) : — 



1 (2^. Pronotum rounded above, without lateral carinae ; median 



carina very feeble. Antennas in J 2-J-, in 5 twice as long a. 

 the head and pronotum taken together. Lamina subgenitalis 

 cJ is long and acute. Pronotum with a broad and sharply 

 marked black stripe along the middle which does not proceed 

 on the elytra. Elytra green with very few (or none at all) 

 scattered small black points. Hind femora green, without any 

 marking ; hind tibiae red, without black rings. 



Th. dorsatus, F. W. 



2 (1). Pronotum not rotundate above ; sometimes with raised median 



carina ; lateral carinae well expressed. Antenna in d" not more 

 than 1| times as long as the head and pronotum together, in 

 2 as long as these, or a little longer. Lamina subgenitalis of 

 male short and obtuse. 



*L. c. p. 23. 



t Uqber die Orthopteren fauna Trans caspiens. — Hor^ Soc. Entom. Ross,, 

 xl, N3, 1912. 



t S'ee also my paper on the Tianscaspian Oithopteia '1. c, 32-34; fig. 3). 



