XXXI, '2O] ENTOMOLOGICAL NKWS 219 



This beautiful little fly is respectfully dedicated to its col- 

 lector, Senor Charles Bruch, to whom I am greatly indebted 

 for many Argentinian Tipulidae. 



Holorusia catamarcensis new species. 



Antennae naked, the basal half yellow, the distal half passing into 

 brown; mesonotal praescutum brownish buff with three conspicuous 

 gray stripes that are narrowly margined with dark brown, the median 

 stripe bisected by a narrow line of this color; legs yellow, the tips of the 

 femora and tibiae dark brown; wings brownish yellow, the stigma and a 

 spot at the origin of Rs darker; abdominal tergites yellow, trivittate with 

 dark brown. 



9. Length about 19 mm.; wing 20.5 mm. 



Frontal prolongation of head brownish yellow, narrowly dark brown 

 laterally; nasus long and slender; palpi dark brown. Antennae with the 

 basal seven segments light yellow, the flagellum thence passing into 

 brown; flagellar segments cylindrical with microscopic verticils only, as 

 in the genus; first flagellar segment very long and slender, nearly as long 

 as the succeeding three taken together. Head pale brownish testaceous, 

 sparsely gray pruinose. 



Mesonotal praescutum pale brownish buff with three conspicuous gray 

 stripes that are narrowly margined with dark brown, the median stripe 

 split by a conspicuous brown stripe; scutum pale grayish testaceous, the 

 lobes largely gray; scutellum and postnotum testaceous, sparsely whitish 

 pruinose, the postnotum with a capillary brown line. Pleura pale brown, 

 sparsely pruinose, the dorso-pleural membranes dull yellow. Propleura 

 dull yellow, with an indistinct brownish spot above the fore coxa. Hal- 

 teres pale, the knobs slightly darker. 



Legs with the coxae yellow, sparsely pruinose; trochanters yellow; 

 femora dull yellow, the tips conspicuously dark brown; tibiae similar, 

 the tips narrowly darkened; tarsi pale brown, the distal segments darker. 



Wings with a strong brownish yellow tinge, the subcostal cell yellow; 

 stigma oval, brown; a brown cloud at the origin of Rs, a brown seam below 

 vein Cu; oblitcrative areas before the stigma in cell ist R2 and across 

 cell ist M2, the basal deflection of Mi +2 and the outer deflection of 

 Mj+4 being largely pale; cell C above the stigma pale; anal cells dark- 

 ened distally, cell ist A with a pale triangle at the apex, slightly before 

 vein 2nd A; veins dark brown. Venation: Rs rather long, exceeding 

 Rj, slightly angulated at origin; vein 7?j not strongly arcuated; cell 

 ist M.2 narrow; petiole of cell Mi about one-half as long as m. 



Abdomen yellowish, the tergites trivittate, a narrow brown median 

 stripe, the apical segments with the caudal margins narrowly darkened; 

 sublateral stripes broader; lateral margins pale gray; second sternite 

 with a large brown blotch at the base. Ovipositor with the tergal valves 

 long, straight, compressed. 



