258 MAINE AGRICULTURAL EXP.ERIMIiNT STATION. I9II. 



4. Gnoristc apicaiis Meigen. 

 Syst. Beschr. I. 243. i. 1818. 

 Male and female. Length 7-8 mm. Coloring as in G. macra 

 from which it differs in wing venation, the subcostal crossvein 

 being distad of the middle of the subcosta, and the cubitus forks 

 under the base of the radial sector. The tarsi of the fore legs 

 twice as long as the corresponding tibiae; the fore tibia about 

 1-8 longer than its metatarsus. "Europe." Said to occur also 

 in Alaska and Colorado. 



2. Genus Probolcrus Williston. 

 Trans. Ent. Soc. London, p. 261. 1896. 



Proboscis more than half of the length of the body, directed 

 downwards and forwards, composed of five slender bristles; 

 palpi wanting. Face very narrow, ocelli apparently absent. 

 Abdomen slender, longer than the wings. Legs elongate, hind 

 legs stouter, femora thickened, and the tibia clubbed. Neura- 

 tion defective, the proximal portion of the media and the ante- 

 rior branch of the cubitus wholly invisible ; anal vein apparently 

 absent ; costa reaches a considerable distance beyond the tip 

 of the radial sector. It is possible this genus should be placed 

 with the Sciarincc. 



Probolcrus singularis Williston. 

 Trans. Ent. Soc, London, 261, pi. 8, fig. 15. 1896. 

 Male. Length 4-5 mm. Front, face and occiput black; 

 antennas brown, the basal joints somewhat yellowish. Mesono- 

 tum opaque deep reddish brown, the humeri and postalar cal- 

 losities yellowish; pleura brown or yellowish-brown, shining. 

 Abdomen black, the first segment and a ])csterior band on the 

 second, third and fourth segments yellow. \\'ings nearly hyaline, 

 lightly clouded on the outer part. Legs, including coxc-e, light 

 yellow ; the tarsi and the thickened portion of the hind tibi?e 

 infuscated or blackish. Halteres yellow. "St. A'incent Island. 

 Altitude 1800 feet." 



3. Genus Acnemia Winnertz. / f^ 

 Verb. Zool.-bot. Ges. Wien, XIII. 798. 1863. 



Ocelli 3 in number placed high upon the front, the laterals 

 remote from the eye margin. Legs moderately long, stout; the 



