338 THE CANADIAN ENTOMOLOGIST. 



Abdomen, tergum dark brown ; sternum lighter brown, extreme 

 caudal margins of tlie sclerites light yellow. 



Hokitype.— 9 . Totonicipan, Guatemala, Cent. Am., 1902. (Dr. 

 G. Eisen.) 



Type in U. S. Nat. Mus. coll. (No. 15,132.) 



This insect agrees superficially with muscosa End.* of Ecuador, but 

 has Sc much longer, legs very different in colour, and is a much smaller 

 species. Muscosa has a supernumerary cross-vein in cell R3, but this may 

 not be normal, as it is not mentioned in the specific description. 



Furcomyia eiseni, sp. n. 



Antenna; black throughout ; body yellow ; legs, femora yellow, 

 passing into brown on the tibite and tarsi ; wings hyaline, with six brown 

 spots along costa, the second, largest, at origin of Rs. 



$ . — Length, from 4.5-5 mm.; wing, 6.3-7.5 "i™- 



9. — Length, from 4.5-6 mm.; wmg, 5.7-7 mm. 



Head : rostrum and palpi black. Antennas black throughout in the 

 i , with conspicuous long hairs, not so noticeable in the 9 . Front, 

 vertex and occiput blackish, grayish pollinose in front. 



Thorax : pronotum dull yellow-; mesonotum dull reddish yellow, 

 with a very indistinct darker median stripe and darker lateral stripes 

 which are brownish, these continued back on the scutum, where they 

 cover the lobes; scutellum and postnotum brownish. Pleuia: yellow, 

 with a more or less conspicuous dark brown stripe running from the cer- 

 vical sclerites to the postnotum. Halteres yellow at base ; apical half of 

 the stem and the knob brown. Legs : coxse and trochanters light yellow ; 

 femora yellow at base, passing into brown ; tibiae and tarsi darker brown. 

 Wings hyaline ; cells C and Sc slightly yellowish ; six brown marks along 

 the costal margin on the cross-veins, as follows : A brown mark at the 

 wing base ; a large brown rectangular mark at the origin of Rs ; a third 

 at the tip of Sc, where it is continued down over the fork of Rs, here 

 meeting the fourth blotch, located at the tip of Ri ; the marks continuing 

 across the cord ; wing subapically largely dark ; outer end of cell ist Mj 

 seamed with brown ; a brown mark in the end of cell 2nd Ri and cell R3; 

 ends of veins Cu„ Cuj and ist A, with small brown clouds ; a large spot 

 at end of 2nd A. Venation : (See fig. s.) Sc long, ending just before 

 the fork of Rs, Scj at its tip ; Ks square at its origin ; base of cell 1st M. 

 arcuated, nearly on a level with the inner end of cell Rj (as in s/i///ii O. S.); 



'igia. Z06I. Jahrbuch.; pt. i, pp. 75, 76 ; fig. W. ( Dicratiomyin.) 



