XXxii, '21] ENTOMOLOGICAL NEWS 179 



out macrotrichiae ; basal deflection of Cu\ at about one-fourth the 

 length of cell 1st M2. 



Abdomen brownish testaceous. Male hypopygium with the pleural 

 appendages elongate ; outer pleural appendage heavily chitinized, arcu- 

 ated, the outer margin with microscopic appressed spines that continue 

 to the apex ; inner pleural appendage a little longer, tapering to the nar- 

 row obtuse apex, which is provided with a few microscopic setae. In 

 the microscope mount of the hypopygium are two slender, chitinized 

 horns that appear to be gonapophyses. What appears to be the homo- 

 logue of the lyriform plate of the ninth sternite of O. lloydi is repre- 

 sented by a short, fleshy median plate, the lateral angles of which are 

 produced into rather short, blunt lobes, the caudal margin of the plate- 

 thus appearing concave. 



Habitat: Argentina. Holotype, $ , Ouebrada Famailla. 

 Tucuman, altitude 1600 meters, 'October 16, 1920 (V. Weiser), 

 in the collection of the Museum of La Plata. 



Orolimnophila argcntinicola differs from the genotype, O. 

 lloydi (Alexander) of Colombia, in the coloration of the 

 wings, the venation and the structure of the male hypopygium. 



Polymera unipunctata new species. 



General coloration light brown, the scutellum and postnotum pruinose : 

 thoracic pleura with a dark longitudinal stripe ; femora with a subtermi- 

 nal brown ring : tarsi brownish yellow ; wings with strong brownish 

 tinge ; a conspicuous brown seam along the cord. 



9 . Length 6.5 mm. ; wing 7.7 mm. Rostrum reddish brown ; palpi 

 light brown. Antennae of female uniformly brown, only the second 

 scapal segment a little more testaceous. Head black with a yellowish 

 gray bloom. 



Pronotum pale. Mesonotum light brown without markings ; scutel- 

 lum and postnotum darker, gray pruinose. Pleura gray pruinose, with 

 a comparatively narrow dark brown pleural stripe, extending from the 

 cervical sclerites beneath the root of the halteres to the abdomen. Hal- 

 teres yellow, the knobs light brown. Legs with the coxae testaceous, 

 the fore coxae a little darkened basally ; trochanters yellow ; femora 

 pale brown, the tips narrowly yellow ; a narrow dark brown subtermi- 

 nal ring; tibiae light brown, the tips dark brown; tarsi pale brownish 

 yellow, the metatarsi yellowish brown, the terminal segments darker 

 brown. Wings with a strong brownish tinge ; very faint brown clouds 

 at the origin of Rs and the forks of R2+3 and .U3 plus Cid : a 

 larger and more conspicuous browr^ cloud along the cord ; veins dark 

 brown. Venation : r on 7?1 comparatively near its tip, the ultimate sec- 

 tion of Rl a little more than one and one-half the basal deflection of 

 Cu\ ; cell A/1 present; basal deflection of Cu\ more than one-half its 

 length beyond the fork of M. 



Abdomen brown, the lateral margins of the tergites darker brown ; 

 sternites pale brown. 



Habitat: Argentina. Holotype, 9, Ciudad, Jujuy, May 22, 

 1920 (V. Weiser), in tin- colUrtion of the Museum of 1 .;i 

 Plata. 



Polymera nnipnuctata \^ related to /'. obscura but is a very 

 different fly. Tile general effect of the wing-pattern is a con- 

 spicuous brown cloud near the center of the paler brown disk. 



