580 I'ROC EEDINGS OK THE ACADEMY OF [Oct., 



injury done tu the tliorax hy tlic piu; scutum gray medially, the 

 lobes yellow outwardly, black on the inner ])art of the lobe; seutelluui 

 gray medially, black on the sides; postnotum blackish gray. Pleura 

 gray. Haiteres yellow, the knob darker. Legs, coxa; and trochanters 

 dull yellow, femora >-eilowish brown, the tip broadly dark brown, 

 tibiie light brown, the tip narrowly dark brown, tarsal segments 

 1 and 2 light brown, the tips of the segments brown, .segments 3 to 5 

 brown. Wings hyaline with abundant brown markings in all the 

 cells including a series of four large marks along the co.sta, the third 

 at the origin of Rs and the fourth at the stigma; venation (PI. 

 XXVII, fig. 22): Sc short ending opposite the origin of Rs, basal 

 deflection of Cih before the fork of M. 



Abdomen with the basal tergites dull brownish yellow, dark brown 

 laterally, segments 6 to 8 dark brown, the hypopygium yellow; 

 sternites dull light yellow, the lateral margin of the sderites brown, 

 segments 6 to 8 uniformly darker. 



Holotype, cf , Colorado, in the U. S. National Museum. 



This is the only North American species with the short subco.sta 

 that has the wings so .spotted; superficially this insect resembles 

 ^imtilans Walker which has a long subcosta, but in the details it is 

 quite a difTereut fly. 



Dioranotayia reticulata Alexander. 



1912. Furcomyia reticulala Alexander; Canadian Kntomolocist , vol 44 

 pp. 334, 335, pi. 11, fig. p. 



One female from Biscayne Bay, Dade Co., Fla., taken by Mrs. 

 Slosson, constitutes the first record for the United States. 



Genus EHIPIDIA Mcigen. 

 ISIS. Rhipidia Meigen; Syst. Beschr., vol. 1, p. 153. 

 Shipidia (Bhipidia) bryanti Johnson. 



1909. Rhipidia bryanti Johnson; Proceedings of the Boston Society of 

 Xatural History, vol. 34, pp. 123, 124, pi. 16, fig. 20. 



This showy Rhipidia has been bred from decaying wood under- 

 neath bark by Mr. R. C. Shannon at Washington, D. C. The male 

 has never been described, but has been found several times; the 

 antenna? in this sex are bipectinate. The collections of Dr. Dietz, 

 Mr. VanDuzee and the National Museum indicate a wide range for 

 this species. Orono, Penobscot Co., Me., June 30, 1913 (Alexander). 

 East Aurora, Erie Co., N. Y., Junc.l5, 1912 (VanDuzee). Plummers 

 Island, Md., September 4, 1904. Potomac Park, Washington, D. C, 

 May 11, 1913 (Shannon). Black Mts., Buncombe Co., N. Car., 

 June 16, 1912 (Beutemnuller). BraidentowTi, Manatee Co., Fla., 



