78 INSECUTOR INSCITI^ MENSTRUUS 



Domingo. It differs notably in the marking of the hind tarsi. In albono- 

 tata the last two tarsals are black and the white rings on the other joints 

 are progressively broader, which is not the case in the present form. 



Uranotaenia hystera, new species. 



Male : Proboscis rather long, distinctly swollen at tip, brownish-black 

 scaled. Palpi very short, blackish. Clypeus small, broad, subtriangular, 

 dark brown. Antennae filiform, the joints subequal, coarsely ciliate, with 

 basal whorls of short and sparse hairs ; tori large, dark brown. Occiput 

 clothed with broad, flat, pale scales, a few suberect narrower white ones 

 on the vertex. 



Mesonotum rich brown on the disc, the sides narrowly, the anterior 

 angles and front margin broadly pale yellowish ; scales on disc sparse, 

 hair-like, black, a short line of broad white scales before roots of wings, 

 anterior angles and front margin with yellowish-white narrow curved 

 scales ; bristles coarse and long, black. Scutellum brown, clothed with 

 dark brown, rather broad, subtruncate scales, some similar scales at sides 

 of antescutellar space. Postnotum dusky brown, pale at the sides, with 

 a fine median ridge. Pleurae and coxae pale yellowish. 



Abdomen depressed, pcirallel-sided, blunt at the tip ; dorsal vestilure 

 dull black, the segments beyond the first with apical yellowish-white 

 bands which are narrowed laterally and abbreviated on some of the seg- 

 ments ; venter pale scaled with indistinct basal segmental bands. 



Wings broad, hyaline ; second margined cell about one-third the 

 length of its petiole ; second posterior cell shorter than its petiole ; posterior 

 cross-vein more than its own length from anterior cross-vein ; scales of the 

 veins dull brown, those on the costa nearly black, the large lanceolate 

 outstanding scales on the third and fourth veins pale ; a short line of bluish- 

 white scales at base of fourth and continued on fifth vein over basal fourth. 



Legs moderately long, rather slender ; vestlture uniformly dark brown 

 with a bronzy luster. Claws minute, simple. 



Length : Body, about 2 mm. ; wing, 2 mm. 



Manoa, Orinoco River, Venezuela, January, 1910 (Dr. F. L. de 

 Verteuil). 



Type: Cat. No. I 600 1, U. S. Nat. Mus. 



Resembles A nisocheleomyia leucoptera Theobald, founded on a single 

 male from British Guiana, but apparently distinct. 



Date of publication, June 30, 1913. 



