364 THE CANADIAN ENTOMOLOGIST, 



gray po!linose. Haltères short, stem dull yellow, knob brown. Legs : 

 COXIÇ! and trochanters da:l yeilow ; femora similar, rather darkened toward 

 the lip ; tibiae and tarsi lig'u brown. Wings hyaline, veins dark brown, 

 conspicuous; stigma indistinct, brownish. Venation (see fig. k.) : Sc 

 ends opposite the origin of Rs ; Sc^ far retracted so that Sc^ is almost as 

 long as the stigma; Rs only a little longer than the deflection of Rj^s; 

 basal deflection of Cu^ at the fork of M. 



Abdomen: tergum dull brown; sternum yellowish brown. 



Holotype. — ?. Neuquen, Argentina, 1907. (Dr. Adolf Lenol.) 



Type in authoi's collection. 



Differs from the hitherto described species by the characters give 1 in 

 under insignifica. From insignifica it differs in its wing venation, colour 

 of veins, and body tone. 



? Fur corny ia fumosa, s p. n. 



Wings infumed, with darker clouds. 



9 . — Length about 5.5 mm ; wing, 6.3 mm. 



Ç . — Head : rostrum and palpi dark brown. Antennae dark brownish 

 black. Front, vertex and occiput brownish, with a grayish pubescence. 



Thorax : pronotum dark brown. Mesonotum light brown, the 

 postnotum darker. Pleurae dark brown. Haltères dark brown, base of 

 the stem light coloured. Legs : coxae and trochanters dark brown, rest 

 of legs broken. Wings infumed with brown, darker brown clouds arraiiged 

 as follows : At origin of Rs, at tip of Sc, at tip of R^, along cord ; most 

 of veins and tip of wing clouded with dark brown. Venation (see fig. 

 t.) : Sc long, Sci ending slightly before the fork of Rs, Sc.^ at its tip ; R^ 

 bends down near its end and touches R2,3, obliterating the cross-vein r ; 

 basal deflection of Cu^ beyond the fork of AL 



Holotype. — ?. Amatuk, British Guiana ; July 14, 191 1. (F. E. 

 Lutz.) 



Type in American Museum of Natural History. 



This insect is closely allied to Limnobia insularis Will. (Dipt. St. 

 Vincent, Trans. Ent. Soc. Lond , i8q6, p. 287, pi. 10, fig. 58), but the 

 wing has quite a different pattern, cell ist M.^ less elongated, basal deflec- 

 tion of Cui farther distad, etc The two species are certainly as close to 

 Furcomyia as they are to Limnobii, but seem to represent a peculiar 

 group which needs further study with more material. 



Mr. Edward P. Van Dl ztE, of Buffalo, leaves early in December for 

 a four months' vacation in California. His temporary address will be 

 San Diego, Calif 



