56 



U. S. NATIONAL MUSEUM BULLETIN 216 



Bay, Ont., June 18, 1935, F. A. Urquhart (Ottawa). d% Constance 

 Bay, Ont., Aug. 17, 1933, G. S. Walley (Ottawa). 29, Constance Bay, 

 Ont., July 20, 1933, and Aug. 8, 1935, G. S. Walley (Ottawa). cT, 

 "Cynthia Township," emerged in incubator from Geometridae, Apr. 

 4, 1947 (Ottawa). d\ "Law Township," emerged in incubator from 

 Geometridae, Apr. 11, 1947 (Ottawa), d\ "Petit Lac Travers," 

 emerged in incubator from Geometridae, Apr. 3, 1941 (Ottawa). 9, 

 Westerly, R. I., Aug. 22, 1946, M. Townes (Townes). 



This species occurs in the Carolinian fauna. It has been reared 

 three times from geometrids. 



IV. ONITIS GROUP 



Head wide to very wide; body moderately short; eye with short 

 sparse hairs; mesopleurum in its lower hind corner with fine longi- 

 tudinal wrinkles; metapleurum with a vertical slotlike pit in its hind 

 end, broadly hairy along its upper margin, rather sharply punctate 

 in the hair band, and with sharp longitudinal wrinkles except in its 

 upper front third (fig. 182, d); median and sublateral carinae of third 

 tergite present basally but absent beyond its middle; fourth tergite 

 without median or sublateral longitudinal carinae. 



We have seen four species of this group, the three Nearctic species 

 treated below and an undescribed species from the mountains of 

 northern Luzon in the Philippines. 



20. Tricces arcuatus, new species 



Figure 182,d 



Front wing 4.2 to 5.9 mm. long; face about 1.6 as wide as high; face 

 and clypeus in profile with an unbroken, evenly convex surface; middle 

 half of apical margin of clypeus truncate or weakly convex; flagellum 



Figure 36. — Localities for 

 Trieces arcuatus. 



