248 U. S, NATIONAL MUSEUM BULLETIN 2 1 6 pakt 3 



ville, and Aleredith); South Dakota (Brookings, Custer State Park, 

 and Whitewood); Tennessee (Burrville, Chimneys Campground in 

 Great Smoky Alts. National Park at 2,800 ft., Knoxville, and La- 

 follette) ; Texas (Beeville) ; Vermont (Dummerston and Woodstock) ; 

 Virginia (Arhngton, near Culpepper, Dayton, Falls Church, Galax, 

 Glencarlyn, Great Falls, Mountain Lake Biological Station in Giles 

 Co., Newington in Fairfax Co., Paeonian Springs, Pimmit Kun, 

 Rosslyn, Skyline Drive, and Vienna); West Virginia (Cheat Mt. in 

 Randolph Co. at 2,000 ft., Jackson's Mill in Lewis Co., Lost River 

 State Park in Hardy Co., Alonongalia Co., and Terra Alta); and 

 Wisconsin (Casco, Cranmoor, Gays Mills, Jefferson, Madison, Mil- 

 waukee, Montfort, Port Edwards in Wood Co., Racine, St. Croix 

 Co., and Sturgeon Bay). 



The species is adult from late spring to mid-fall, the males being 

 most common in the earlier part of the season and the females most 

 common in the later part. The typical habitat is in sunlit grassy 

 and weedy areas with scattered trees and bushes. Males are usually 

 seen flying between the grass and weed stems. Females fly among 

 bushes and low vegetation and commonly alight on the ground. 

 Sometimes they are seen in woods, exploring the surface litter. Some- 

 times they are on flowers. The series before us contains two lots 

 labeled as collected on Daucus carota and two on Pastinaca sativa. 

 Reared specimens are as follows: 9, from a geometrid. Spruce Woods, 

 Man., May 14, 1939. 9, from Grapholitha molesta, Riverton, N.J., 

 May 24, A. Peterson, cf , from Grapholitha molesta, Middletown, N.J., 

 Mar. 17, 1924, A. Peterson, cf , from Grapholitha molesta, New Bruns- 

 wick, N.J., Feb 18, 1924, A. Peterson. 9, from Heliothis zea, Beeville, 

 Tex., October 1895. 9, from Macronoctua onusta, Ithaca, N.Y., fall 

 of 1936, G. H. Griswold. 



This subspecies occurs in the Carolinian and Alleghanian faunas. 



34b. Trachysphyrus albitarsis argentifrons (Cameron) 



Cry plus bicolor Smith, 1879, Descriptions of new species of Hymenoptera in the 

 collection of the British Museum, p. 231; ?. Name preoccupied by Lucas, 

 1846. Type: ?, Irazu, 6,000 to 7,000 ft., Costa Rica (London). 



Cryptus monticola Cameron, 1885, Biologia Centrali-Americana, Insecta, Hy- 

 menoptera, vol. 1, p. 203; 9. Name preoccupied by Wesmael, 1840. New 

 synonymy. Type: 9, Ciudad, 8,100 ft., Durango, Mexico (London). 



Cryptus argentifrons Cameron, 1885, Biologia Centrali-Americana, Insecta, Hy- 

 menoptera, vol. 1, p. 204; c?. New synonymy. Type: cf, Northern Sonora, 

 Mexico (London). 



Cryptus eggeri Dalla Torre, 1902, Catalogus hymenopterorum, vol. 3, p. 569. New 

 name for Cryptus bicolor Smith. 



Cryptus coloradensis Ashmead, 1890, Proc. U.S. Nat. Mus., vol. 12, p. 408; 9- 

 New synonymy. Type: 9, "Powder River, Colo," (Washington). 



Cryptus consobrinus Viereck, 1906. Trans. Amer. Ent. Soc, vol. 32, p. 225; 9. 

 Type: 9, Oak Creek Canyon, 6,000 ft., Ariz. (Lawrence). 



