O. A. JOHANNSEN 393 



row of long fine setae of decreasing length on the basal three-fourths on the 

 outer lateral extensor surface, a row of increasing length on apical half on the 

 outer lateral flexor side; fore tibia with two setae on outer lateral side, middle 

 tibia with a row of long setae not of uniform length on the posterior extensor 

 side; posterior tibia with two strong setae on outer lateral extensor side at the 

 middle and distad; and two rows of long, closely spaced, slender setae on the 

 flexor side, one of which is outer lateral and the other is inner lateral in position. 

 Claws and pulvilli long. Wings rilled, hyahne with a smoky tinge, veins 

 yeUowish-brown, crossveins conspicuously clouded; costal spine distinct but 

 not large; Ri ends sUghtly distad of the r-m crossvein; R4+6 and M1+2 dis- 

 tinctly divergent; penultimate section of M1+2 is half as long as the ultimate 

 section; m-cu crossvein slightly flexed, about a tenth longer than the last 

 section of Cui; squamae yellow tinged, lower one projects over one-third its 

 width beyond the upper; halteres yellow. Ithaca, New York, June. Mill- 

 ville, Nova Scotia. 



This species goes into the couplet 35 on page 429 in Schnabl's 

 key to Aricia sens lat.,^ but is readily distinguished from the 

 two species of that couplet. 



The type (from New York) is in the Cornell University Collec- 

 tion. The paratype (from Nova Scotia) is in the collection of 

 the American Entomological Societj^ of Philadelphia. 



Aricinae 

 Dialyta, Hydrotaea, Orphyra, Pogonomyia, Alloeostylus and 

 Phaonia are genera of this subfamily represented in New York. 



DIALYTA Meigen 



The species of this genus are very few in number and all seem 

 to be exceedingly rare. Following Schnabl and Dziedzicki the 

 genus may be characterized as follows: Habitus Tachinid-like; 

 front broad in both sexes, in the female a little more than a third 

 of the head in width, in the male either equally broad or somewhat 

 more narrowed. Face receding, sometimes greatly; buccae 

 moderately narrow to broad; antennae elongate, either hanging 

 free or in contact with the face; arista pubescent or short plu- 

 mose; palpi somewhat broadened toward the apex; cruciate 

 frontal setae absent; outer verticals and post verticals well 

 developed; orbitals of the female in a single row on each side; 

 eyes bare, or sparsely and short pubescent below. Sterno- 

 pleurals three, the posterior pair wide apart, the three thus nearly 

 forming an equilateral triangle, almost as in the Coenosinae. 



^Horae Soc. Ent. Ross., vol. xx. 



TRANS. AM. ENT. SOC, XLII. 



