308 Professoi' Williston on the Diptera of St. Vincent. ■ 



Syneches. 



Walker, Dipt. Saunders, 165, 1856. 



1. Syneches pusillus. (PL XI., fig. 84, wing.) 



Syneches pnsillus, Loew, Centur., i., 25. 



Hah. Illinois, New York. 



Two specimens agree with this description. I have 

 no specimens from the United States for comparison. 



Drapetis. 

 Meigen, Syst. Beschr., iii., 1822. 



1. Drapetis xanthopodus, n. sp. (Pi. XI., figs. 85, 



antenna ; 86a, wing.) 



^ , $ . Deep shining black ; legs yellow ; first posterior cell a 

 little narrowed at the extremity. Length 2-2^ mm. 



Antennas, front and proboscis black : eyes contiguous below the 

 antennae ; front very narrow or subcontiguous in both sexes. 

 Occiput black, with black pile. Thorax and abdomen shining 

 black, the mesonotum a little metallic ; pile short, dusky. Legs, 

 including the coxae, yellow, the tarsi more or less infuscated : hind 

 metatarsi brown or brownish : elongate and somewhat thickened ; 

 hind tibia3 with a short terminal spur ; all the femora stout. 

 Wings cinereous hyaline ; third and fourth veins gently convergent 

 near the margin. 



Ten specimens. 



2. Drapetis flavidus, n. sp. (PI. XI., figs. 86, antenna; 



SQa, wing.) 



$ 1 ^ . Yellow or reddish-yellow ; head and the fourth 

 abdominal segment black. Length 2-2j mm. 



Occiput, vertical triangle and front black. Eyes contiguous 

 below the antennae, subcontiguous above. Antennge yellow, the 

 third joint sometimes brownish. Thorax reddish-yellow, the 

 mesonotum shining, with light-coloured hair and bristles. 

 Abdomen yellow, opaque, the fourth segment and the hair black. 

 Legs light yellow, with light-coloured hair and bristles ; hind 

 tibite in the male with a stout curved spur at the tip ; hind femora 

 less thickened than the middle ones ; the front pair considerably 

 thickened. "Wings hyaline ; the outer portions of the third and 

 fourth veins parallel or very slightly divergent. 



Numerous specimens. 



