NEW MUSCOID FLIES FROM THE ANDEAN MONTANYA 125 



yellow like wing bases. Two preacrostichal and three postacrostichal 

 bristles. 



Type, TD395 1 (fly, dissection of uterus, and slide of colored mag- 

 gots). The maggots are much shortened. The uterus is straplike. 



Eusignosoma aureolatum, new species. 



Length of body, 8.5 to 8.75 mm. (female), the abdomen being arched ; 

 of wing, same measurement. Three females, montana of San Gaban 

 Canyon; one, Casahuiri, about 4,500 feet, February 4, 1910, on flow- 

 ers of Mik.ania sp. ; the other two, Uruhuasi Bridge, about 6,500 feet, 

 February 15, 1910, on flowers of Baccharis sp. 



Differs from E. aureum as follows : Head and thorax slightly more 

 deeply golden pollinose, the pollen of thorax in one specimen only a shade 

 less golden than marking of anal segment. Scutellum with same pollen 

 as thorax. Anal segment measured on median line conspicuously shorter 

 than other segments combined. Deep golden spot of amal segment 

 reaching sides of segment near hind border and reaching front border of 

 segment only in the middle, including in its area four to six pairs of bristles 

 with their black punctate origins. No long bristles on sides of first three 

 abdominal segments, but instead only the thick black pile which is hardly 

 longer than that of disk. Wings a little more noticeably yellow at base, 

 not so deeply infuscate, lighter on apiceJ and inner area. Tegulae both 

 deep smoky-yellow, the hind scale slightly darker. Tjirsi concolorous 

 with rest of legs. Third antennal joint lighter in color. 



Typ>e, Casahuiri (more deeply golden specimen). 



Eusignosoma nigrum, new species. 



Length of body, 8.5 mm. ; of wing, 9 mm. Two males, Uruhuasi 

 Bridge, about 6,500 feet, February 3 and 15, 1910, on flowers of 

 Baccharis sp. 



Head and thorax wholly deep golden, frontalia light brown ; first two 

 antennal joints reddish, third brown with some reddish at base, arista 

 black. Occipital to parafacial pile golden. Four faint narrow thoracic 

 vittae of usual interrupted pattern. Scutellum and abdomen wholly soft 

 subshining black, including venter, the first three segments faintly reddish 

 on sides. Anal segment shorter than other segments combined. No 

 marking of anal segment. Legs wholly deep rust-yoUowish or reddish- 

 yellow. Wings evenly infuscate, but with the basal yellow filling in the 

 costsil and baisal cells. Both scales of tegulae deep smoky-blackish, more 



