ORTHOPTERA OF MESOPOTAMIA AND PERSIA. 76i> 



Gen. — Pteronemobius, Jacobs. 

 Pteronemohius gracilis, Jak. 



Gryllus gracilis, Jakovleff, 1871, Hor. Soc. ent. Ross., VI, p. 20, tab. 1, fig. 

 3, 3a..—Nobius mayeti, Finot, 1893, Ann. Soc. ent. Fr., Bulletin, p. 252. — 

 Nemobius addungi, Uvarov, 1912, Hor. Soc. ent. Ross., XL., p. 39. 



Mesopotamia : Amara, R. Tigris, April-June 1918 (P. A. Buxton), 4 c? , 

 112 ;— Amara, at light (N. E. Evans, 7-8-18), 2 J, 1$. 



Mr. B. Uvarov himself supposed that his N. adelungi was the same species 

 as the north African N. mayeti ; after a careful comparison between the 

 specimens collected in Mesopotamia and examples of N. mayeti from Algeria, 

 I cannot hesitate to publish this synonymy ; but, in its turn, as M. Uvarov 

 makes me remark, the latter species must fall in synonymy with Gryllus 

 gracilis, Jak. which, although descripted in Russian, is vahd, the drawing 

 being quite sufficient to recognize the insect. The species is a Pteronemohius 

 as the male possesses a tubercle-like spine very near the base of the internal 

 border of the posterior tibiae. 



Gen. — Acheta, L. 



Acheta bimaculata, De Geer. 



Mesopotamia : Amara, 9-8-18, at light, 1 S ; under stone by Diala River 

 north-east of Baghdad, 1 young. 



Acheta amarensis, n. sp. 



Types : — One male, one female from Mesopotamia, Amara (P. A. Buxton, 

 26.6-18). 



Co-type : — One male, same locality. 



Rather small species, wholly shining black, very similar to A. morio, F. Head 

 smaller than in this latter species, scarcely wider than the pronotum ; ocelli 

 extremely small, disposed almost in a straight line ; face tumid. Pronotum as 

 wide posteriorly as anteriorly., its posterior border almost straight. Abdomen 

 black ; subgenital plate of J very much compressed, that of $ small, notch- 

 ed at apex. Ovipositor shorter than the posterior femora. Legs black ; the 

 posterior femora somewhat tinged with reddish at their inferior margin chiefly 

 in the male ; posterior tibiae short, armed with 3 external and 4 internal very 

 strong spines ; internal spurs strong, the superior decidedly longer than the 

 intermediate one ; metatarsi longer than the other joints of the tarsus, some- 

 what dilated in the middle, their internal face rounded, the external one 

 depressed ; external superior margin keeled and armed with 3 rather strong 

 spines, the internal one rounded, armed with 1 apical spine ; apical spurs strong, 

 the internal extending a little farther than the midst of the last joint of the 

 tarsus. 



Tegmina of male as long as the abdomen ; speculum broader than long, 

 rounded anteriorly ; diagonal vein rather long, slightly sinuate ; 3 postaxillary 

 veins, the 2nd one very much curved ; 2 veinlets between the diagonal and the 

 postaxillary veins ; 3 oblique veins ; apical field rather short with 6 longi- 

 tudinal veins and a very wide, somewhat irregular reticulation. Lateral field 

 black with 5 longitudinal veins and the mediastinal which is triramose and 

 very much curved at apex. Tegmina of female with 9 dorsal veins, the 5 internal 

 of which very close, the 4 others separated by veinlets forming a v.'ide 

 reticulation ; 5 veins in the lateral field and the mediastine which is triramose 

 as in the male but not curved at apex. Wings candate, blackish near the 

 anterior border. 



Length of body, cj' . 16 mm., ? , 18 mm. ; length of tegmina, ^9,11 «"«• *■ 

 length of wings, $ . 17 mm., 2 , 17-5 mm. ; post, fern., ^ 9 , 8*5 ram. ; post. tib.. 

 ^2,6 mm.; post, tarsi, $ 9, 4-5 mm. ; ovipos. 8 mm. 



