THE CANADIAN ENTOMOLOGIST 121 



Hair at anal base shorter, less dense, and that on anterior coxae 

 short; smaller species; bristles of veins usually distinct 29 



29. Spurs 1, 3, 3 30 



Spurs 1, 2, 2, or 1, 2, 4, or 1, 3, 4 32 



30. Anal cell not divided at base; basal veins obsolete; radius bent 



at stigma; an ocellar macrochaeta Hylepsyche, n. gen. 



(Halesus indistinctus Walk.) 

 Anal cell divided as usual, most of basal cross-veins 



distinct 31 



31. Radius bent at stigma, which is very distinct; membrane not 



granulate Halesochila. 



Radius scarcely bent at stigma, which is not especially distinct; 



no ocellar macrocha^tse Driisus. 



32 Spurs 1, 3, 4; no distinct ocellar macrochaetae 33 



Spurs 1, 2, 2, or 1, 2, 4 35 



33. Fork 3 in fore wings acute at base, sometimes 



pedicellate Algonquina, n. gen. 



(Parachiona parvula Bks ). 

 Fork 3 in fore wings not acute, but reaching before the 



anastomosis 34 



34. Anastomosis is placed before end of the subcosta; the apical 



cells very long Anisogamus. 



Anastomosis beyond end of the subcosta, apical cells 



normal ' Apolopsyche, n. gen. 



(Stenophylax minusculiis Bks.) 



35. Ocellar macrochaetae present; spurs 1, 2, 4; wings rather narrow, 



first fork reaches a long distance back on discal 



cell Ecclisomyia. 



Ocellar macrochaetae absent, spurs 1, 2, 2, or 0, 2, 2; membrane 

 granulate - 36 



36. Discal cell shorter than the pedicel or barely 



longer Pota nwrites. 



Discal cell much longer than its pedicel 37 



37 Radial vein scarcely bent at the stigma, wings less 



broad Ironoquia . 



{Chcetopterygopsis parvula Bks.). 

 Radial vein strongly bent at the stigma; wings 



broad Chilostigma. 



I 



