294 ENTOMOLOGICAL NEWS [XXXI, '2O 



A New Species of Dixa from Argentina 

 (Dixidae, [Dipt.) 



By CHARLES P. ALEXANDER, Urbana, Illinois. 



Species of the family Dixidae from the South Temperate 

 Zone are very uncommon. The only other species known is 

 D. chilensis Alexander,* from Chile. The following species 

 was taken in association with several interesting species of 

 Tipulidae that are recorded elsewhere. 

 Dixa argentina, sp. n. 



Rostrum obscure yellow; head black; mesonotum with three velvety 

 black stripes, the anterior lateral margins yellow; pleura largely dark 

 brown ; knobs of the halteres brown ; wings dusky, a conspicuous brown 

 spot at r-m; abdomen brownish black. 



cf . Length about 2.3 mm.; wing, 3.2 mm. Rostrum obscure yellow; 

 palpi dark brown. Antennae setaceous, black, the scapal segments 

 slightly paler. Head black. 



Mesonotum yellow on the antero-lateral angles; disk with three velvety 

 black stripes, the interspaces dark brown; median stripe not reaching 

 beyond midlength of the sclerite; remainder of the mesonotum black. 

 Pleura yellow with a very broad brownish suffusion that covers all the 

 sclerites with the exception of the sternum and the dorso-pleural mem- 

 branes. Halteres dark brown, the base of the stem yellowish. 



Legs with the coxae and trochanters light yellow; femora light brown, 

 the tips narrowly blackened, most conspicuous on the posterior legs; 

 tibiae and tarsi dark brown. 



Wings with a strong dusk} tinge, the costal and subcostal cells slightly 

 more yellowish; a large brown cloud at r-m; veins dark brown. Vena- 

 tion: Sc ending just beyond the origin of Rs; Rs straight, very slightly 

 sinuate, in direct alignment with J? 4 + 5 ; R 2 + s only moderately arcuated, 

 much shorter than either R 2 or R s ; r-m at the fork of Rs; m-cu opposite 

 or slightly before r-m. 



Abdomen brownish black, the sternites a very little paler. 



Habitat: Argentina. Holotype, 6" , La Granja, Alta Gracia, 

 Province de Cordoba, April 1-8, 1920 (Charles Bruch). 

 Paratopotype, cf. Type in the collection of the author; 

 paratype in the collection of the Museu La Plata. 



Dixa argentina bears a certain resemblance to D. centralis 

 Loew of the United States but the details of coloration are 

 very distinct. The types were collected by my friend, Dr. 

 Charles Bruch, to whom I am indebted for manv favors. 



"Entomological News, vol. 24, pp. 176, 177; 1913. 



