482 



U. S. NATIONAL MUSEUM BULLETIN 216 



(Bedford, Columbus, and Hinckley in Medina Co.) ; Ontario (Midland 

 and Ottawa); Pennsylvania (Crisp in Westmoreland Co., Harrisburg, 

 Inglenook in Dauphin Co., Marsh Run in York Co., Ohiopyle, Phila- 

 delphia, Pittsburgh, and Spring Brook); Quebec (Brome and St. 

 Esprit); Rhode Island (Hopkinton and Westerly); South Carolina 

 (Greenville) ; and Virginia (Arlington Junction, Dead Run in Fairfax 

 Co., Dunn Loring, Falls Church, Great Falls, and near Plummers 

 Island). 



Collection dates are rather evenly distributed from mid-spring to 

 early fall. Unusually early and late dates are: April 14 at Dead 

 Run, Fairfax Co., Va.; May 5 at Washington, D. C; May 11 at 

 Tryon, N. C. and at Harrisburg, Pa.; May 18 at Jaffrey, N. H.; 

 September 11 at Pittsburgh, Pa.; September 14 at Riverton, N. J.; 

 September 20 at Greenville, S. C; and October 30 near Plummers 

 Island, Md. We have collected the species many times in the under- 

 growth of woods. 



This species is in the Alleghanian and Transition faunas. Adults 

 occur from mid-spring to early fall. 



Figures 220, 221.— Localities: 220 (left), Odontocolon albotibiale; 221 (right), 



0. ochropus. 



21. Odontocolon ochropus, new species 



Male: Front wing 3.5 to 9 mm. long; first flagellar segment about 

 1.13 as long as second; punctures on mesoscutum small, weak, sepa- 

 rated by about 2.5 their diameter; propodeal teeth about 1.0 as long 

 as their basal width; punctures on hind femur moderately strong, 

 moderately dense, sparser below, near lower margin of femur separated 

 by about three times their diameter ; second segment of middle tarsus 

 about 3.7 as long as deep; fifth segment of hind tarsus about 0.96 

 as long as second segment; nervellus broken usually near its lower 



