1919.] 147 



sometimes interrupted ; sides pale bluish or greenish with two short black lines 

 on the sutures near the base of the wings. Legs bluish white, with black spines, 

 femora and tibiae black externally, tarsi and claws al^o with dark annulations. 

 Abdomen bronzed black above, yellowish or bluish at the sides and beneath, 

 eighth segment entirely blue, sternites with a black line up to about the eighth 

 segment. First segment with a quadrate mark occupying nearly the whole 

 dorsal surface, with a tine blue Hue posteriorly; segment two with metallic 

 slieen dorsally ; 1-3 blue at sides and beneath; 4-6 dorsally narrowly yellow 

 at the base except at the dorsal carina ; 3-6 narrowly black on the sides at 

 their distal end ; 7-9 blue at sides and beneath. Hind margin of tenth seg- 

 ment elevated, when seen from above nearly semicircularly excised. The 

 appendages viewed directly fromTthe side little visible, the superior showing 

 as a somewhat triangular process and the inferior as a pale tubercle ; viewed 

 directly from behind the superior are black, ovate, inwards with a large per- 

 pendicular truncate branch ; inferior with a large black acute tooth or process 

 turned inwards towards the centre. Wings hyaline, neuration black ; ptero- 

 stignia rhomboidal, bordered with' rather thick black veins, centre black (less 

 densely so in hind wings), leaving a narrow, pale margin all round ; it covers 

 rather less than one cell in both wings. 



2 . Head and thorax much as in the (^, but the prothorax has two small 

 pale lateral dots ; ante-humeral stripes on thorax broad and distinct; black on 

 legs reduced, sometimes partly broken up into dots; dorsal spot on first 

 segment of abdomen cleft by a pale line for a considerable part of its length 

 (may be divided entirely). Pterostigma, as a rule, less dark in the centre than 

 in the male. Examples occur having the thorax and first abdominal segment 

 as in tlie male. 



Easily separated from Isclinura hulcharensis, occupying the same 

 area, by the pterostigma of the fore wing of the c? , which in /. buk- 

 harensis has the outer portion pale as in the more typical species of the 

 genus. In I. hukliarensis the prothoracic lobe is lower and the neura- 

 tion of the wings at the apex shows a closer network in both sexes. 

 No red females have apparently been found, a circumstance which might 

 suggest association with Enallagma, but, on the whole, it seems prefer- 

 able to regard the species as a somewhat aberrant Ischnura. In the 

 material examined the 8th abdominal segment is constantl}^ blue in both 



sexes. 



Length of hind wing . . S 16-17 ; $ 15-20 mm. 



abdomen . . 23-25; 20-26 mm. 



1 5 on bushes by side of Tigris, Amara, November 5th, 1917 ; 

 a long series of both sexes from the Azizah Marshes, near Carraba Jedeid, 

 between Masharra and Chahala Canals, about twenty miles from Amara, 

 March 2nd, 1918 ; and further 6 6' and 2 $ , chiefly from gardens by 

 the Masharra and from near the Tigri-s, March 17th, 19th, 22nd, 

 April 2nd, 21st, 28th, and May 2nd, 1918 {Evans) ■ also cJ c? and $ $ 

 at Amara. March and April; 5 2' Qurnah, May 17th; Hamar Lake, 



o2 



