Empididae. 205 



below the antennæ. The facets seem to be of equal size. There is 

 a small incision in the middle of the inner eye-margin. There are 

 three ocelli on the vertex, and a pair of forwards curved hairs. The 



Fig. 83. Antenna of L. flavipes. x 80. 



antennæ are inserted near to each other, in or above the middle; 

 they are five-jointed, the basal joints are short, the first cylindrical, 

 the second almost globular; the third joint is somewhat elongated, 

 conically tapering and compressed; it terminates with a long, two- 

 jointed, apical arista, the first joint of which is very short. Epistoma 

 is high and very narrow, or {sphenoptera) not present, the eyes here 

 touching. There are no jowls developed, the eyes going quite to the 

 mouth aperture. The proboscis is short, only just reaching out of 

 the aperture. I have not been able to examine the mouth parts, 

 which are probably similar to those in Ocydromia. Thorax is rect- 

 angular, high, and very arched above. Pro- and metathorax small. 

 There are short, uniserial dorsocentral and bi- or pluriserial acrostichal 

 bristles or hairs. A notopleural and a postalar bristle generally present, 

 sometimes also a supraalar bristle, and there may be other small 

 hairs present at the sides of the disc. Scutellum has two or a greater 

 number of marginal bristles. Metapleura with short, fine hairs, or 

 {sphenoptera) bare. Abdomen is slender; it consists in the usual way 

 of eight segments, the last is small or hidden. The male genitalia 

 form a smaller or larger forceps with unsymmetrical arms, between 

 them a thin, sinuous penis curves upwards. In the female the eighth 

 segment forms generally a long, compressed, sword-shaped ovipositor, 

 which at the apex bears a small joint, terminating with a pair of 

 thin styles; in sphenoptera the eighth segment is shorter, conical, not 

 compressed, but likewise with a joint with two styles at the apex. 

 The legs are somewhat long and slender, the hind legs longest, the 

 hind tibiæ may be a little thickened towards the apex. The legs are 

 haired with shorter or longer hairs, and have bristles to a various 

 degree; also apical spurs on the tibiæ are present. There are two 

 claws, two pulvilli, and a linear, pointed and bristle-bearing empo- 

 dium. The wings have the mediastinal vein not reaching the margin; 

 the cubital vein is unforked and thus one cubital cell; the discai vein 

 likewise unforked, thus three posterior cells, and the discai cell sending 



