33C THE CANADIAN ENTOMOLOGIST. 



of the veins seamed with brown ; apical portions of the radial ceils suffused 

 with brown. Venation : (See fig. q.) Sc ends beyond origin of Rs, Sc^ 

 at its tip ; cross-vein r at tip of R^ ; Rs arcuated at origin ; basal deflec- 

 tion of Cui before the fork of M. 



Abdomen, tergum yellowish, the apex of each sclerite brown, with a 

 narrow brown median band ; sternum, markings less clearly defined. 



Holotype, Ç. — Bocas d'Toro, Panama; Sept. 28, 1903. (P. 

 Osterhout, coll.) 



Type in U. S. Nat. Mus. coll. (No. 15,130.) 



Fwcomyia transliicida, sp. n. 



Whitish ; mesothoracic prfescutum with a narrow median brown 

 stripe ; femora darkened at the tip, pale subapically ; wings with brown 

 spots and bands ; a supernumerary cross-vein in cell Rg. 



$. — Length, 5.8 mm.; wing, 6.9 mm.; middle leg, femur, 5.7 mm.; 

 tibia, 5.2 mm. 



$. — Head: rostrum and palpi dark brown. Antennae, basal seg- 

 ments brown, flagellum yellowish, the terminal three or four segments 

 brown; segments of the flagellum short, globular, the apical segments 

 more elongated. Front, vertex and occiput light yellow, the vertex with 

 a large brown spot in the centre. 



Thorax : pronotum dark brown, becoming paler, yellowish white on 

 the sides ; mesonotum, prsescutum very pale, almost white, with a clearly- 

 defined dark brown median stripe, rather narrow, ending at the suture ; 

 scutum and scutellum pale, whitish, with a dark brown stripe on each 

 lobe, running backward and meeting on the caudal margin of the scutel- 

 lum ; postnotum with a very broad brown median mark resulting from the 

 confluence of the scuteliar stripes. Pleurae very pale, whitish ; a brownish 

 mark on the propleurae above the fore coxa. Haltères pale, knob dark 

 ibrown. Legs : coxse and trochanters whitish ; femora yellowish brown ; 

 a cleirer yellow subapical ring, tip broadly brown, the extreme apex again 

 rather lightened ; tibiae and tarsi brown, gradually increasing to dark 

 brown. Wings : subhyaline or very faintly yellowish ; a brown mark at 

 the humeral cross-vein extending down across the arculus ; a second mark 

 at tip of Sci and down across Rs almost to M ; a third, extending into a 

 ■cross-band, from the stigma, where it is darkest, unbroken across the cord ; 

 a brown seam on the supernumerary cross-vein in cell R3 ; outer end of 

 cell ist M2 seamed with brown. Venation : (See fig. r.) Sc short, end- 

 ing just beyond the origin of Rs ; Sc2 just opposite origin of Rs ; R^ ex- 

 teiiding beyond cross-vein r-m, r at its tip. Rs square at its origin and 



