Dolichopodidx of St. Vincent {West Indies). 333 



apically. The first longitudinal vein ends about one-third of the 

 way to the apex. Its end is a trifle beyond the large cross-vein. 

 Second and third veins close together diverging uniformly through 

 their whole course, the latter ending rather far from the apex. 

 The costal vein ends with the third longitudinal instead of con- 

 tinuing to the fourth. The fourth longitudinal vein becomes 

 gradually weaker beyond the posterior cross-vein for about three- 

 fifths of its course. It then curves suddenly forward for a short 

 distance, curves back again into its original direction, and ends in 

 the apex. The whole portion beyond the first curve is very deli- 

 cate and transparent, and sometimes the section running forward 

 is entirely obsolete. 



$ . Face scarcely wider than the male. Pulvilli of usual size. 

 Abdomen even less metallic than in the male, without the terminal 

 bristles, otherwise appearing much the same. The tibiae and tarsi 

 are sometimes lighter in colour than in the other sex. 

 Length 2-3 to 2-5 mm. ; of wing, 2 mm. 



Eleven males and twenty females. Several specimens 

 are labelled " May," and one " Seashore." 



This species is closely allied to A. interrupt us, Loew, 

 but the latter is over 5 mm. long. The colour of the 

 thorax seems by the description to be different also. 



Lyroneurus. 



Loew, Wien. Ent. Monatsch., i., 37, 1857. 



1. Lyroneurus simplex, n. sp. (PL XII., fig. 117, wing c?.) 



(J . Front bright bluish-green, brownish-black along the borders ; 

 face green, brownish dusted, but somewhat silvery pollinose from 

 above, a very little narrowed in the middle. Palpi yellow, with 

 long black bristles, proboscis black. Antennse black, very short? 

 the third joint crescent-shaped, hairy, with a long slender sub- 

 apical arista. Cilia of the inferior orbit and another row behind 

 them white. Thorax metallic-green brown-dusted. Acrostichal 

 bristles in a single row. Eight or ten small humeral bristles. A 

 brownish- black stripe along the transverse suture, running forward 

 to the humerus. Just below, a spot is silvery when viewed from 

 above. Pleura green, white pollinose, more silvei-y from above. 

 Halteres and tegulse yellow ; cilia of the latter yellowish. Scu- 

 tellum with the usual small and large bristles ; between the 

 scutellum and wing is a concave area, black, with a silvery spot. 

 Abdomen green, considerably dusted, rather elongated, scarcely 

 tapering. Hypopygium concealed, only a few minute yellow 



TKANS. ENT. SOC. LOND. 1806. FAKT III. (SEPT.) 28 



