218 



[October. 



dark line, behind -wliicli there seems to be another obscure line and other 

 markings. Prothorax with heavy black median line (continued with interrup- 

 tions to the end of the abdomen), lateral margins blackish ; between the lateral 

 markings and the median line an interrupted narrow line. Mesothorax : prae- 

 scutum with two somewhat wedge-shaped markings on either side of the 

 median line, scutum with interrupted lines, and scutellum with the median 

 line distinct and two black points near its base. Legs : tibiae of two anterior 

 pairs with black annulation at base, middle, and apex; posterior pair at apex 

 only; tarsi annulated with black. Abdomen with interrupted dorsal line and 

 rather broad waved lateral lines with short streaks between. 



^ 2 



Fig. 1. — Apex of abdomen from beneath of Gepvs hnxtoni, 2- 

 2. — Apex of abdomen from side of Gepus huxtoni, $. 



Wings : fore wing cross- veinlets in 9 to 11 costal cellules proximal to the 

 pterostigma. Venation white, with blackish or brownish interruptions. Many 

 of the costal veinlets with a dark dot in the middle and also at the point at 

 which they anastomose with the costa. Pterostigma yellowish, with tliree 

 black veinlets on the proximal side. Subcosta with a blackish dash at the 

 "base of eacl) costal veinlet up to about the pterostigma. Radius marked with 

 long black dashes alternating with pale intervals up to its joining the subcosta. 

 Rs and branches, also cubiti and branches, with long black dashes ; oblique lines 

 (anteapical and on inner margin) present; most of the marginal forks shaded. 

 Colour scheme of hind wings similar, but less strongly marked. (Plate 11, fig. 2.) 



Length of fore wing 35 mm., hind wing 31 mm. 



1 2 , Basra, 18.viii.l8 {Buxton). 



Gepus invisus Navas. 



1 S , Kut-el-Amara, 9.viii.l8 (Biuvton). 



In referring this 6 to the above species I have followed Petersen. 

 In the wing-markings it agrees almost perfectly with an Egyptian § so 

 named by that author, hut it differs in having double rows of cells 

 between some of the branches of Cua^. The wing-markings also 

 agree with Navas's figure of G. curvatus, which was originally described 



