508 PROCEEDINGS OF THE ACADEMY OF [Oct., 



segments with abundant strong hairs; tibiae without spurs. Wing 

 (of the male) (Plate XXVII, fig. 40) with the stigma enormously 

 enlarged so that the costal and radial veins in that field are bulged 

 outward; stigma extending from the basal portion of cell Ri to the 

 end of vein R t ; wing (of the female) with the stigma smaller, the 

 cells Ri not so wide and the cross-vein r consequently shorter and 

 more nearly straight. Sc moderately long, ending just before the 

 fork of Rs; Sc 2 far retreated, lying just beyond the origin of Rs; 

 Rs long, straight, in a line with #4+5; cross-vein r long, oblique, 

 somewhat twisted, inserted at the end of Rs or just beyond on 

 R 2+3 ; R 2+3 about as long as R 2 alone; R 2 arcuated at its base; cell 

 1st M 2 closed (sometimes open by the atrophy of cross-vein m, which, 

 when present, is usually weak) ; basal deflection of Cui at or just 

 before the fork of M; fusion of Cu x and M 3 moderate, about one-half 

 of Cui alone or a little longer than the deflection of Cui. 



Genotype. — ? Trimicra empedoides Alexander. (Mid-western Ne- 

 ar ctic region.) 



Empedomorpha empedoides Alexander. 



1 Trimicra em-pedoides Alexander; Canadian Entomologist, vol. 48, pp. 44, 45 

 (1916). 



This curious fly ranges from South Dakota to Texas and New 



Mexico, an unrecorded station being Brownsville, Texas, May 3, 



1904 (H. S. Barber), a 9 in the collection of the United States 



National Museum. 



GONOMYIA Meigen. 

 Gonomyia Meigen; Systematische Beschreibung, vol. 1, p. 146 (1818). 



The numerous species of this genus may be divided into three 

 subgenera, Gonomyia, Gonomyella and Leiponeura, and it is the last- 

 named group that has caused so much confusion in the study of 

 crane-flies during the past few years, the species having been de- 

 scribed in a wide range of Limnobine and Antochine genera (Dicra- 

 nomyia, Atarba, Elliptera, Teucholabis, Thaumastoptera, etc.). 



Brunetti, in his exhaustive work on the "Diptera Nematocera of 

 British India," pp. 469, 470, enters into a long discussion as to 

 the homologies of the veins of those species of Gonomyia which have 

 but two branches of the sector reaching the wing-margin, i.e., the 

 subgenus Leiponeura Skuse. He presents the rather far-fetched 

 idea of the cell R 2 being unusually large, sessile and the vein _R 4+ 5 

 lacking so that cross-vein r-m connects M 1+2 with R 3 . A study of a 

 series of the species of the genus show the impossibility of this inter- 

 pretation, R i+S being one of the most constant veins of the wing in 



