\'ol. xxv] Iv^'To^rnI,o^.IC.\r. ni;\vs 353 



vcntro-mcdian line nnrlorncatli the protcctincr slicath of the Sth stcrn- 

 ite is a median lohe directed vcntrad. deeply divided medially to form 

 two cylindrical lohes which are densely clothed with long, apprcssed 

 silky hairs. Pleural region with the following appendages: a large 

 pale external appendage, directed dorsad in a position of rest, its tip 

 rather sharp-pointed, on its outer margin near the middle, with a 

 prominent chitinized tooth, the whole appendage clothed with long 

 pale hairs; inner appendage smaller, flattened, fleshy, pale, clothed 

 with ahundant pale hairs. Inside of the genital chamber, just beneath 

 the lobes of the Oth tergite is a pair of irregular appendages very 

 densely provided with small, rounded chitinizcd tubercles. 



Holotype.—Mn\c, \'enczucla, ex. Coll. TT. Fnihstorfer, in 

 the Hungarian National Museum. 



From the species of what seem to he ITnlorusia. pallidi- 

 nenns Mcqt. (Dipt. Exot.. Stippl. T. p. t6) and alhocostata 

 Mcqt. (1. c., pp. 15. ifil, (his differs in its wing--pa(tcrn and 

 lonjsr pale yellow antennae. From H. maya Alex. f.Ann. Knt. 

 Soc. Am.. \'oI. 5. p. 35R, Tor2) it differs in its much smaller 

 size and quite different color. 

 Holorusia laevis, sp. n. CPI. XV. fig.s. S. 15). 



Flagellum of antennre without bristles; antenn.-e of ? moderately 

 long, flagellum bicolored ; mesonotum reddish brown with indistinct 

 darker lines; wings light brown, a .';quare' spot in cell M near the mid- 

 dle of its length. 



i1/a/r.— Len.gth. 13,4 mm.; wing. iR mm.; fore leg. femur. 11 mm.: 

 tibia. 1 1.5 mm.: tarsus, segment I. 10 mm. 



Palpi moderate in length, dark brown; frontal prolongation of the 

 head rather short, nasus ver>' long and prominent, front light brown ; 

 antennae moderately long, if bent back, extending a little beyond the 

 wing root, segment I rather short, about one-half as long as the third 

 segment, flagellar segments cylindrical, not constricted, unarmed with 

 bristles except a small pair at the tip, segments i and 2 light brown, 

 3 dark brown, 4 to 8 dark brown, yellowish at the tip, 9 to the end 

 dark brown, the entire flagellum densely covered with white downy 

 hairs; head rich brown. (See Plate XV, fig. 15). 



Pronotal scutum reddish brown, scutellum almost white. Mesonotal 

 pn-escutum reddish brown with very narrow indistinct darker lines; 

 scutum reddish brown; scutellum and postnotum pale yellowish white. 

 Pleurae uniform pale yellowish. Halteres rather long, brown. 



Legs, coxx and trochanters light yellow, femora light yellowish 

 brown, dark brown at the tip: tibi.e brown, scarcely darker at the tip; 

 tarsi brown. 



