INSECUTOR INSCITI^ MENSTRUUS 169 



with bronzy and blue reflection, mid tarsi with brassy luster 

 above, white beneath on four last joints. Fore and hind tarsi 

 without white. Claw formula : 0.0-0.0-0.0. Length : Body, 

 3.5 mm. ; wing, 3.5 mm. 



Genitalia : Side-pieces over twice as long as wide ; outer 

 angle uniformly produced, leaving the clasp-filament as a 

 small club-shaped appendage arising well beyond middle of 

 side-pieces ; a ridge of broad setae extends beyond and below 

 the middle of the side-piece. Four ligulate appendages and a 

 leaf with broad base and pointed tip on side-piece near apex. 

 A small lobe medianly and basally. Harpes weak with 

 rounded tip, a slight tooth laterally at apex. Each basal ap- 

 pendage with five stout setje. 



We have two males, bred from Bromeliaceae. Cie des mines 

 d'or, Lawa River. They come very near Wyeomyia auto- 

 cratica D. & K. of the monograph of mosquitoes of North 

 and Central America and the West Indies. These two males 

 come without any doubt in the new genus Hystatomyia, to 

 which autocratica should also be referred. 



Cotype, No. 22701, U. S. National Museum. 



Prosopolepis flui, new species. 



Female. Proboscis short, swollen at tip, black. Palpi short, 

 one-fifth of proboscis, black. Antennae slender. Clypeus with 

 small elliptical, somewhat outstanding white scales on margin. 

 Occiput with brown, flat scales, whitish at sides, a few black 

 erect scales near the neck. Prothoracic lobes well separated 

 with flat, brown scales. Mesonotum with small brown ap- 

 pressed scales. Scutellum with small flat, dark scales with 

 whitish luster. Postnotum with a group of setae posteriorly 

 and a patch of dull, white scales in front. Abdomen sub- 

 cylindrical, dorsally black, ventrally yellowish white, colors 

 separated in a straight line. Wings very slightly smoky, scales 

 of veins elliptical. Legs brownish-black, with slight metallic 

 reflection, vestiture not roughened, pale beneath ; three last 

 hind tarsal joints white nearly all round, the apices of third 

 and fourth joint with a black ring ; mid legs with the base of 



