arr. 4, REVISION OF THE FAMILY THEREVIDAE—COLE. #15 
Massachusetts: ‘‘Mass.’’ (Osten Sacken), [M.C. Z.]; Rutland, June 
5 (C. W. Johnson); Brookline, June 17 (C. W. Johnson); Waltham, 
June 14 (C. W. Johnson), [Cole]. 
New York: North Elba, July [Amer. Mus.]; Ithaca, July 2; Slater- 
ville, June 14 [both Cornell]; Gowanda, June 14; Lancaster, June 30 
[both M. C. Van Duzee}]. 
Illinois: ‘‘Tllinois’? (Osten Sacken), [M. C. Z.]. 
Michigan: Agricultural College, June 5 to July 12 [Cornell]; Pequam- 
ing, July 11 and 28 (M. Hebard), [Harrisb. coll.]. 
» Colorado: Spanish Peaks, June 15 (Osten Sacken), [M. C. Z.]. 
Idaho: Moscow Mount, June 23 (Cole), [Cole]. 
Washington: Paradise Valley, Mount Rainier, July 17 (E. C. Van 
Dyke), [Cal. Acad. Sci.]. 
THEREVA FLAVICINCTA Loew. 
1869. Thereva flavicincta (male) and gilvipes (female) Loew, Berl. Ent. Zeitschr., 
vol. 13, p. 168. 
Type localities—The type males were described from northern 
Wisconsin and White Mountains, New Hampshire, the female (as 
gilvipes) from Massachusetts. 
Types.—In the Museum of Comparative Zoology at Cambridge. 
The one male examined was 10 mm. in length, the genitalia rather 
small, yellowish brown, with yellowish white pile. The female is 10.5 
to 12 mm. in length; the frontal callus heart-shaped, deeply notched 
below, with a dull black mark joining to the eyes on each side as in 
frontalis. ‘The species has been reported from New Jersey. 
Distribution.—The following distribution is known for the species: 
Canada: Ridgway, Ontario, June to July 20; Fort Erie, July 5; 
Kearney, July 8 (all M. C. Van Duzee), [Van Duzee]. 
New Hampshire: White Mountains (Geo. Dimmock), [Cole]; White 
Mountains (Osten Sacken), [M. C. Z.]; Bretton Woods, June 30 (M. 
C. Van Duzee), [Van Duzee]. 
New York: Little Valley, June 30; Protection, June 16 (both M. 
C. Van Duzee), [Van Duzee]. 
THEREVA FLAVICAUDA Coquillett. 
1904. Thereva flavicauda CoquiuuETT, Invertebr. Pacifica, vol. 1, p. 23. 
Type.—Female, No. 6710, U.S.N.M. 
The only specimens known to the writer are the type and paratype 
females in the National Museum, taken in Ormsby County, Nevada. 
THEREVA DUPLICIS Coguillett. 
Plate 10, fig. 122; plate 11, fig. 148; and plate 12, fig. 159. 
1893. Thereva duplicis CoquitueTT, Can. Ent., vol. 25, p. 198. 
Type localities.—Coquillett’s material was from South Dakota and 
Montana. The types are in the National Museum collection. 
60466—23—Proc. N.M.vol.62——21 
