1912] New Neotropical Tipidince 357 



Tipula atacama, sp. n. 

 Small; yellow and brown; wings reddish-brown with hyahne spots; 

 femora dark with a light subajiical ring. 



9 Length, about 12 mm.; wing, 14.2 mm. 



Fore leg, femur, 6.8 mm.; tibia, 7.6 mm.; tarsus, about 12.5 mm. 



Head : Anterior prolongation of the front and palpi light yellowish- 

 brown, the latter darker toward the tip. Antenna;, .segments 1 — 3, 

 orange-yellow, remainder black. Front with a distinct protuberance 

 just behind the antenna;; front, vertex and occiput pale yellow. 



Thorax: Pronotum light yellow, a brown transverse mark in front; 

 a semi-lunar bro\ATi spot on either side behind. Mesonotum, prajscutum 

 dark brown behind, a broad dark liver-brown median stripe of this 

 color beginning near the cephalic margin of the sclcrite, broadest in 

 front, narrowing V)chind, reaching the suture; the caudal half of the 

 sclerite is thinly grey pruinose; cephalic half, on cither side and in 

 front, of the median stripe, bright orange; scutum dark brown, thickly 

 grey pollinose; scnitellum and postnotum dull yellow, browai on the 

 sides. Pleurae, brown, more yellowish vcntrally; sternum yellow. 

 Halteres yellow, knob slightly darker. Legs (fore only remain) : coxae 

 and trochanter yellow; femur, light yellowish-brown, a dark brownish- 

 black ring at the tip with a light yellow subapical ring; tibia and tarsus 

 brown. Wings: suffused with pale reddish-brown, adorned with hyaline 

 spots arranged about as follows: (1) the clearest fill most of cell 1st M2 

 and extends down into the base of cell Mi, the outer deflection of IM3 

 being whitened; (2) in cell IRi above the fork of Rs; (3) In cell C above 

 the tip of Sc. Less clear spots are in the center of cell R and, nearer the 

 tip; a double spot near base of cells R3 and R5; one at base of M and cu; 

 pale centers to cells M, Cu and 1st A. Venation as in Fig. d. 



Abdomen: Tergum, light yellow, segments 3 — S slightly darker 

 brown caudad; extreme ventral margin of tergites' dark brownish- 

 black. 8th tergite narrow, especially medially, due to the concave 

 caudal margin. 9th tergite (see Fig. u) narrow, moderately long; base 

 of the ovipositor cylindrical; the valves (u) broad at the base, rapidly 

 narrowing to the slender, sub-spatulate tips. 9th steniite broad basally, 

 conical, the valves (e) flattened, blade like, shorter than the upper 

 valves. 



Holotype, 9 , San Antonio, Bolivia, (Received from Staud- 

 inger-Bang-Haas) . 



Type in author's collection. 



The specific name is that of a native tribe of Indians dwell- 

 ing west of the Andes and south of the region inhabited by 

 the Aymaras. 



It may be allied to decorata Phil, and Jrauenjeldi Schin. 

 (Chilian species) in the tuberculate front, but is little related 

 in other respects. In wing-coloration, atacama shows some 

 resemblance to flavipennis Phil. (Chile) but is only about half 

 as large and shows conspicuous colorational differences. 



