370 Professor Williston on the 



on the second and third segments. The front is 

 broad, with a black stripe. The wings show a noticeable 

 difference in that the posterior cross-vein is at right- 

 angles to the fourth vein, and is a little shorter than the 

 penultimate section of the fourth vein. In the males 

 described above the anterior angle of the discal cell is 

 distinctly less than a right angle, and the posterior 

 cross- vein is longer than the penultimate section of the 

 fourth vein. The epistoma is but little prominent in 

 either sex. 



3. Limnophora {Spilog aster t) exul, n. sp. (PI. XII., 

 figs. J 22, head of $ ; 122a, wing.) 



(^ . Black. Eyes narrowly separated below the ocelli : median 

 black stripe of the front expanded triangularly below ; orbital 

 margins silvery pollinose. Antennas black ; the third joint does 

 not reach to the oral bristles ; arista short plumose. Face light- 

 grey pollinose. Proboscis and palpi slender, black. Mesonotum 

 light yellowish-grey, opaque, with three broad, black stripes, the 

 lateral ones widened back of the suture to the root of the wings. 

 Scutellum black, its margins grey with four bristles, the apical 

 cruciate pair approximated. Pleurae light-grey pollinose, the upper 

 part black. Abdomen elongate ovate ; opaque light yellowish-grey; 

 the first segment, except the posterior lateral margins and a pair 

 of large triangles on the second and third segments, extending the 

 whole length of each segment, and leaving a narrow stripe between 

 them, black ; fourth segment with three black or brown spots, the 

 median one elongate. Legs black ; pulvilli elongate ; none of the 

 tibiae hairy. Wings lightly tinged ; fourth vein sinuous near the 

 extremity, narrowing the first posterior cell. Tegulae white, the 

 under one much larger than the upper one. Length 6-7 mm. 



$ . Front less than one -third of the width of the head, with a 

 broad black stripe. Abdomen broader and shorter, the deep-brown 

 (not opaque black) markings more extensive, leaving a median 

 stripe on the first three segments and the posterior angles of the 

 first segment opaque grey. 



Ten specimens. St. Vincent. 



CCENOSIA. 



Meigen, Syst. Beschr. Europ. Dipt., v., 210, 1826. 



1. Goenosia Jlavipes, n. sp. 



(^ . Front densely light-grey pollinose, the ground-colour showing 

 through bluish ; in width about one-fourth that of the head. 



