368 Professor Williston on the 



LiSPA. 



Latreille, Precis, etc., 1796. 

 1. Lisp a uliginosa. 



Lispa uliginosa, Fallen, Dipt. Suec. Muse, 93 ; 

 Loew, Stett. Ent. Zeit., viii., 24; Kowarz, 

 Wien. Ent. Zeit., xi. — Europe, North America. 



Six specimens. St. Vincent. 



Cyrtoneuea. 



Macquart, Hist. Nat. Dipt., ii., 274, 1835. 



1. Cyrtoneura macuUpennis, n. sp. (PI. XII., figs. 121, 

 head, of $ ; 121a, wing.) 



^ . Eyes bare, separated at the vertex by a space not twice the 

 width of the ocellar tubercle. Front with a median, narrow, black 

 stripe, broader at the lower end ; orbits silvery-grey, with a single 

 row of bristles, descending as far as the proximal end of the second 

 joint of the antennae. Ocellar tubercle with two strong procli- 

 nate bristles. Antennae black, the second joint and the immediate base 

 of the third largely yellowish, the third joint reaching nearly to 

 the strong oral bristles ; arista long plumose. Face light-grey 

 poUinose. Proboscis and palpi black. Mesonotum lightly grey 

 pollinose ; in some lights with two slender, interrupted stripes on 

 each side, and the beginning of two median ones in front. 

 Scutellum grey pollinose, large, triangular, with two approximated 

 bristles at its apex. Pleurae black, only slightly pollinose. 

 Abdomen short and broad, greyish-^-ellow pollinose, somewhat 

 variable in different reflections, the shining ground-colour showing 

 through ; clothed with short bristly hairs and with moderately 

 long bristles at the tip. Legs wholly black. Wings greyish- 

 hyaline, or uniformly tinged with pale brownish ; a small blackish 

 spot at the tip of the auxiliary vein, and one on the anterior cross- 

 vein ; the posterior cross- vein, which is nearly straight and 

 rectangular to the fifth vein, is lightly clouded ; first posterior 

 cell slightly narrowed in the margin. Tegulae nearly white, the 

 upper one smaller than the under one. Halteres yellow. Length 

 4|-5^ mm. 



§ . Front less than one-third of the width of the head, the 

 median black stripe broad, and of equal width. Pulvilli a little 

 smaller than in the male. Abdomen grey, with irregular light- 

 brown markings. 



Six specimens. St. Vincent. 



