Diptera of St, Vincent (West Indies), 369 



LIMNOPHOEA. 



Robineau Desvoidy, Essai sur les Myod., 517, 1830. 



1. Limnophora exilis, n. sp. 



^. Front long, the eyes very nearly contiguous below the 

 ocelli, leaving a very narrow space in which there are rows of long 

 slender bristles ; below, the opaque black of this space broadens 

 out into the frontal triangle, leaving the orbits narrowly silvery. 

 Antennas black, the third joint not reaching to the vibrissal bristles ; 

 arista bare. Face lightly grey pollinose ; epistoma but very little 

 projecting ; cheeks very narrow. Mesonotum shining black 

 the lateral margins in front of the suture, the pleurae and the 

 abdomen, where not spotted, light-grey pollinose. Scutellum 

 shining black. Abdomen ovate, the first segment in large part, 

 the second and third each with three large, subconfluent, subopaque, 

 black spots ; fourth segment for the most part shining. Legs 

 black ; hind tibiae with long black pile on the inner side ; pulvilli 

 not elongated. Wings yellowish hyaline ; penultimate section of 

 the fourth vein shorter than the posterior cross -vein, the latter 

 rectangular. Palpi black. Length 3^ mm. 



Two specimeus. St. Vincent. 



2. Limnophora dehilisj n. sp. 



$ . Eyes nearly contiguous below the ocelli. Front silvery 

 white, with a large, opaque, black triangle below, with two 

 rows of erect black bristles. Antennae dark-brownish red ; 

 arista bare. Face silvery grey. Thorax black ; mesonotum 

 densely light yellowish-grey pollinose, with three complete and 

 two incomplete, narrow, dark-brown stripes. Pleurae densely light, 

 grey pollinose. Scutellum of the same yellowish-grey colour as 

 the dorsum of the thorax, with a discal, dark-brown spots; it is large 

 and triangular, and has a pair of apical cruciate bristles, and one 

 on each border. Abdomen ovate, opaque light yellow; first segment 

 on the sides and the fourth segment for the greater part black, 

 covered with light-yellowish pollen ; second and third segments each 

 with a pair of dark-brown, opaque spots. Legs black, the knees 

 yellow ; hind tibiae not hairy. Tegulae white, the under one project- 

 ing. Halteres yellow. "Wings greyish hyaline. Length 5-6 mm. 



Two specimens. St. Vincent. With these two male 

 specimens, there is a large number of female specimens 

 of smaller size, in which the abdomen is black in 

 ground-colour, with two pairs of dark-brown spots 



