60 On a new Species o/'Nemopterldge. 



fjetius, when the already described but imperfectly known 

 allied forms, and otherswliich no doubt remain to be discovered, 

 can be fully studied. 



Genus Chasmatoptera. 



Chasmatoptera, Kirb. Ann. & Mag. Nat. Hist. (7) vi. p. 462 (1900). 



The rather sliort, stout, and strong-jy pubescent antennae 

 are quite sufficient to separate the type of this genus {Nemo- 

 ptera Huttii, Westw., from Australia) and the new species 

 described below from Halter, Kamb., in the typical species 

 of which tiie antennae are slender, naked, and longer than the 

 body. 



C/iasmatoptera Sheppardi, sp. n. 



Dimensions. 



6. $. 



mm. mm. 



Long, corp 12-14 13-14 



Exp. al. aut 3G-40 38-46 



Long. al. post 28-33 30-34 



Anttnnaj entirely black ; head black above, often marked 

 with yellow behind; face yellow, with a broad black median 

 stripe extending to the end of the rostrum. Thorax black 

 above, often spotted with yellow, especially in the male ; 

 abdomen black above, with yellow incisions, and in the 

 male with yellow dots between. Under surface of the body 

 mostly yellow, of abdomen often reddish. Wings clear 

 hyaline, with brown nervures ; costal nervure slenderly 

 blackish ; subcostal nervures and sometimes intermediau 

 space yellowish. Hind wings with the shaft yellow, with two 

 black dots on the outer side and one on the inner; at the 

 extreme base short transverse lateral lines are sometimes 

 visible. Beyond the middle the wing expands into a very 

 broad j^patulate lobe, with reticulated neuration, followed 

 by a smaller and narrower one, and then by a short terminal 

 lobe, rounded at the end. The lobes are purplish brown, and 

 in the male are preceded by a white space ; and the contracted 

 part of the wing between the lobes is white on each side, the 

 shaft always remaining dark ; in the female both lobes are 

 often entirely dark, but the terminal lobe is always white. 



Hob. Amanus Mountain^:, Asia Minor (^Dr. Sheppard). 



Much resembles the South African Nemoptera dilatata, 

 Klug, which is probably congeneric if the antennae are 

 pubescent, which the figure and description do not show. In 

 tliat species, however, tlie head is yellow above. 



