320 DIPTERA OP NORTH AMERICA. [PART IV. 



tips of the principal veins the brown of this picture is paler, 

 forming ring-like spots or ocelli ; the principal ones of these 

 ocelli are : one, at the origin of the prsefurca, connected with a 

 brown spot, occupying the greater part of the base of the wing; 

 another at the inner end of the first posterior cell, a third on the 

 great cross-vein, and a fourth on the supernumerary cross-vein in 

 the penultimate posterior cell ; these three ocelli form a part of a 

 broad brown band, running from the anterior to the posterior 

 margin ; the two next ocelli (one at the inner end of the first 

 submarginal vein, the other at the posterior end of the discal 

 cell) form, with two small ocelli on the hind margin of the wing, 

 a second band, running across the wing ; this band emits a branch 

 which runs towards the tip of the wing and fills the whole apical 

 portion of the double first posterior cell ; there are some small 

 ocelli along the apical margin of the wing. 



I possess two specimens of this insect, for which I am in- 

 debted to Dr. Fitch ; I am not aware of the precise locality, 

 where they were taken ; but it was probably either in the State 

 of New York, or in the Green Mountains of Yermont. As stated 

 above, I am in doubt as to the sex of these specimens. 



