42 Prof. Charles P. Alexander on 



pleural appendages; outer appendage broad-based, gradually 

 narrowed into a curved apical point or hook; intermediate appen- 

 dage cylindrical, the terminal two- fifths produced into a slender 

 spine that is inserted on the proximal edge of the basal section; 

 inner appendage dark, subrectangular, provided with numerous 

 setae. Penis-guard conspicuously trifid at apex. 



Hab. Brazil. 



Holotype, ^J, Young, Iguape (Bras. Exped. Wettstein, 

 1891). 

 Allotopotype, 9. 

 Type in the collection of the Vienna Museum. 



Gonomyia (Progonomyia) peruviana, sp. n. 



Closely related to 0. velutina Alexander; mesonotal praescutum 

 grey with three brown stripes ; pleura striped longitudinally with 

 yellow; wings subhyaline, sparsely spotted with brownish grey; 8c\ 

 ending opposite mid-length of the long sector; male hypopygium 

 with the intermediate appendage a long, straight, chitinised rod 

 that tapers to the acute point, before the middle of its length with 

 a small, acute, lateral point. 



Male. — Length about 5-5 mm. ; wing, 6-3 mm. 



Rostrum and palpi dark brown. Antennae moderately elongated, 

 dark brownish black. Head dark coloured, light grey pruinose. 



Pronotum grey, dark brown medially. Mesonotal praescutum 

 light grey with three dark brown stripes, the median stripe broader 

 than the lateral stripes; pseudosutural foveae large and conspicu- 

 ous. Pleura brownish grey with a broad, longitudinal, light yellow 

 ventral stripe, the mesepimeron similarly coloured. Legs light 

 brown, the tips of the femora slightly darker. Wings subhyaline; 

 stigma oval, pale brown; conspicuous brownish grey clouds 

 arranged as follows : along the cord ; at m; at the origin of Rs ; 

 in cell 31 at two- thirds its length; near the base of cell C«l and 

 near the end of cell \st A at the end of vein 2nd A ; veins dark 

 brown. Venation : 8c long, Scl ending bej^ond mid-length of the 

 long Rs, Sc2 some distance from the tip of Scl, the latter vein 

 alone being a little longer than the basal deflection of Cul ; Rs 

 long, gently arcuated ; jB2 + 3 a little shorter than R2 ; r near 

 two-thirds the length of i?2 + 3 ; R2 less than one-half Pv3 ; 

 deflection of i?4 -f 5 arcuated; cell 1st M2 open; basal deflection 

 of Cul about one- half its length before the fork of M. 



Abdomen dark brown. Male hypopygium with the outer pleural 

 appendage chitinised, curved, the comparatively long apex ending 

 in an acute point; intermediate pleural appendage a very long. 



