ALEXANDER, CRANE FLIES FR. S. CHILE & TIERRA D. FUEGO. 7 



Hahitat. — Chile. 



Holotype, $, Rio Aysén (P. Dusen). 



Type in the Riksmuseum in Stockholm. 



If Polymoria Philippi is to be recognized as a valid 

 genus or subgenus, Limnophila duséni will probably be more 

 correctly referrable to it. It agrees in some respects with 

 Polymoria punctipennis Phil., which, however, is a grayish 

 brown speeies with differently marked wings. 



It is with great pleasure that this fly is dedicated to 

 the noted botanist who collected the types of this and seve- 

 ral other interesting speeies of Diptera in the vicinity of the 

 Aysén River. 



Subfamily Tlpullnae. 



Tribe Tipulinse. 

 Genus Tipula Linn^us. 



In the present coUection, no less than eleven speeies of 

 the genus Tipula were included. There have been six other 

 speeies described from Southern Patagonia and Tierra del 

 Fuego but none of these are included in the present coUec- 

 tion. These speeies are Tipula pictipennis Walk. (1836), 

 T. rufirostris BiG. (1891), T, variineura (BiG.) (1891), T,flavo- 

 annulata Jacobs (1900) and T, wittei and T. philippiana 

 Alex. (in press). 



The general facies of the speeies of Tipula in the vici- 

 nity of the Straits of Magellan may be summarized as fol- 

 lows: 



The speeies are almost invariably dark-colored with the 

 head and thorax gray pruinose. The abdomen is usually 

 yellow or yellowish and often trivittate with brown. A con- 

 siderable number of the speeies have the antennae dark brow- 

 nish black with only the second segment of the scape con- 

 spicuously light yellow or brownish yellow. All of the known 

 speeies (excepting T. wittei Alex., of Santa Cruz, Patagonia, 

 which has the wings almost uniformly subhyaline) have the 

 wings spotted or streaked with brown or gray and thus fall 

 in the major divisions of the striatae and marmoratae. The 



