LAMB— DIPTERA : LONCH^ID^, SAPROMYZID^, EPHYDRID^, ETC. 329 



The bristles are as follows: three stout outwardly overhanging fronto-orbital bristles, 

 inner convero-ino- verticals and outer somewhat finer verticals, no true post-verticals ; an 

 ocellar pair midway between each basal ocellus and the front one; another pair of bristles in 

 front of these, each about midway between the true ocellar bristles and the forward fronto- 

 orbital bristles. The ocelli are unusually wide apart and form an equilateral triangle. 



The silvery jowl bears three bristles about equally spaced, the lowest is below about 

 the middle of the eye and half-way down the jowl, and points downwards and forwards, 

 the other hind two point somewhat upwards; on viewing the face in profile the fronto- 

 orbital and jowl bristles converge towards one another to form a sort of cage to protect 

 the eyes. The facial bristle of C nasica is absent. The antennae are much as in that 

 species, black, with a faintly pubescent arista. 



The silvery labrum is visible; tongue large and fleshy. 



Thorax. The chsetotaxy is as in C. nasica, but the four dorso-central bristles and 

 the marginal bristles are proportionately longer and more striking. Otherwise the 

 dorsum is absolutely bare and smooth, contrasting with the bristly dorsum of C. nasica. 

 The scutellum has four bristles, the terminal ones directed upwards, the two basal 

 ones backwards, but it lacks the small dorsal pairs. The pleural bristles are destroyed 

 by the pinning of the specimen. 



Wings and halters as C. nasica. 



Legs : front femora have a row of five fine long bristles, and the middle and hind 

 femora are slightly spiny in front; hind femora in no way thickened. 



Abdomen. Narrow and long but segmented as in C. nasica ; two processes on the 

 dorsal side for holding the egg as shown in the figure. The preceding segment has the 

 pair of long bristles. 



Size about If mm. 



Locality. Seychelles. Mah^: from seaweed on beach at Long Island, VII. 1908. 

 A second badly preserved specimen is among some material from Coetivy. 



Chloropidae. Chloropinae. 

 Ops, Becker.* 

 Ops Becker, Ann. Mus. Nat. Hung., viii. (1910), p. 402. 



33. Ops glaberrima, n. sp. (PL 16, figs. 1 — 4). 



$, ?. This species must be near Chloropisca callichroma Loew from Africa, but 

 differs therefrom in several essential points. 



Head (PI. 16, figs, l, 2). The f'rons and face are of equal width, the eye-margins 

 being parallel and equidistant from tlie vertex to the mouth. The vertex and frons are 

 bright yellow with a small black shining vertical spot. The vertical "triangle" (PI. 16, 

 fig. 2) is very shining and extends from the vertex (where it nearly fills the space from 



* This name is preoccupied in the Lycaenidae ; see de Nic^ville, Journ. Bombay Nat. Hist. Soc., vol. ix. 

 1895, p. 296. 



42—2 



