4 PROCEEDINGS OF THE XATIOXAL :\rUSEUM vol. 75 



(Shannon and del Ponte, 1927:733) the fly has been recorded from 

 Tucuman, Salta, and Jiijuy in Argentina. 

 Paratype.—Fem&h, Cat. No. 41589, U.S.N.M. 



BRl'CHOMYIA SriANNONI. new species 



General coloration pale j^ellow; antennae of male 28-segmented, of 

 female 27-segmented, nearly as long as the body; wings uniformly 

 pale, with pale brown macrotrichiae; i/j in alignment with i/1+2, r-m 

 at the fork of J/1+2. 



Male. — Length, about 4.5 mm.; wing, 4.5-5 mm.; antenna about 

 4-5 mm. 



Female. — Length, about 5 mm.; wing, 6 mm. 



Rostrum yellow; palpi elongate, brownish yellow. Antennae of 

 male unusually long for a juember of this genus but varying in rela- 

 tive length in difl"erent specimens, 28-segmented, including the ter- 

 minal button; first flagellar segment longest, more than one-half 



FiGUKE 1.— WlNr.-VEN.^TION OF BRUCHOMYI.^ SH.\NNONI, NEW SPECIES: 



A = Anal; Oi=ruBiT.\L; M = Medial; R = Radial; Sc=Subco9tal veins 



longer than the second; succeeding flagellar segments gradually 

 decreasing in length, the outermost oval, the terminal segment veiy 

 reduced in size; flagellar segments clothed with long appressed to 

 semiappressed setae; antennae pale, the setae brown. In the female 

 antennae 27-segmented, the proportions of the segments about as in 

 the male. Head yellowish testaceous, the center of the vertex some- 

 what darker. 



Mesothorax entirely pale yellow to testaceous yellow, the notum 

 somewhat darker, the conspicuous setae pale brown. Halteres pale, 

 the knobs a little darker. Legs pale brown, clothed with chiefly pale 

 appressed setae, with scattered smaller erect setae. Wings uniformly 

 pale, with abundant pale brown macrotrichiae; costal fringe dense; 

 no incrassation of H^ at bend or grouping of trichiae into a dark patch 

 at this point as in a/yent'ina. Venation (fig. 1): Sco extending to 

 about opposite three-fourths the length of R2 + 3, Sci subequal but 

 pale and relatively indistinct; Rs gently angulated and broken at 

 near inidlength; R2 + 3 about one-third longer than R4 + 5; basal section 



