134 Journal New York Entomological Society. tVoi. xxvu. 



Dicranomyia jorgenseni new species. 



Antenna black; head gray; thoracic praescutum with five chestnut-brown 

 stripes, the three intermediate narrow ; pleura gray with a narrow brown 

 stripe ; femora yellowish with a narrow dark brown subterminal ring ; wings 

 subhyaline with dark brown spots, apex of the wings darkened ; Sc short, Sc 2 

 at the tip of Sc t . 



Male. — Length, about 5.5 mm.; wing, 7.4 mm. 



Female. — Length, 6.5-6.9 mm. ; wing, 7-7.6 mm. 



Rostrum and palpi dark brown. Antennae dark brownish-black. Head 

 light gray. 



Mesonotal praescutum with a pale brownish-gray bloom ; lateral margins 

 of the sclerite dark brown ; thoracic stripes narrow, chestnut-brown, the 

 middle stripe ending far before the suture ; the sublateral stripes cross the 

 suture and appear as a narrow stripe on the proximal third of the scutal lobes ; 

 remainder of the scutum and the scutellum light grayish ; postnotum dark 

 brown with a sparse gray bloom. Pleura grayish with two brown longitudinal 

 stripes, the sternal stripe broader, the dorsal stripe beginning just above the 

 fore coxa. Halteres yellow, the knobs dark brown. Legs with the coxae and 

 trochanters light yellow ; femora yellow with a dark brown subterminal ring, 

 this being two or three times as wide as the pale tip ; tibiae yellowish-brown, 

 darker at the tips ; tarsi light brown, the terminal segments darkened. Wings 

 grayish subhyaline with a heavy brown pattern, arranged as follows : at the 

 arculus ; in cell R midway between the arculus and the origin of the sector; 

 stigmal blotch enclosing a rounded hyaline spot before crossvein r; tip of 

 the wing in cells 2d R lt R 3 , R 5 and 2d M, ; narrow seams along the cord and 

 outer end of cell 1st M„; a rounded spot at the tip of the second anal vein. 

 Venation (Plate I, Fig. 3): Sc short, ending just beyond the origin of Rs ; 

 Sc, at the tip of Sc 1 ; Rs almost square at its origin ; basal deflection of Cu t 

 some distance before the fork of M. 



Abdomen dark brown, the sternites paler medially. 



Habitat: Argentina. 



Holotype, £, Esquina Grande, Catamarca, May 1, 1915 (P. Jor- 

 gensen). 



Allotopotype, J. 



Paratype, 5, Cerro de Carocal, Catamarca, altitude 3100 meters, 

 February 17, 1915 (P. Jorgensen). 



The types bear the label " common on the rivers." 

 Dicranomyia parishi Alex. 



1914. Dicranomyia parishi Alex.; Trans. Am. Ent. Soc, Vol. 40, pp. 

 226, 227. 



Two specimens from Gatun, Canal Zone, Panama, December 12- 

 14, 1912 (Zetek). The species has been recorded only from British 

 Guiana. 



