296 PROCEEDINGS OF THE NATIONAL MUSEimi vol. in 



present the species is easily distinguished from all of its relatives; 

 otherwise, the combination of characters given in the key will be 

 necessary to accurately define it. It also seems possible that the 

 Mexican dusmeti Arias may turn out to be dispar (see discussion 

 under rufoabdominalis). 



Ogcodes (Ogcodes) rufoabdominalis Cole 



Plate figure 34 



Ogcodes rufoabdominalis Cole, Trans. Amer. Ent. Soc, vol. 45, p. 68, pi. 15, fig. 

 43, 1919; Psyche, vol. 30, p. 48, 1923.— Sabrosky, Amer. Mid. Nat., vol. 31, 

 p. 389, 1944; Amer. Mid. Nat., vol. 39, p. 419, 1948. 



Diagnosis: Species of group v. Both sexes have a yellowish 

 orange to brownish orange abdomen with a narrow or broad median 

 row of black, subtriangidar spots and a row of small, dark brown, 

 spiracular spots; the thorax is entirely black, the legs are brown witli 

 black inf uscations ; venation as in plate 3, figure 11; aedeagus as in 

 plate 7, figure 34; ejaculatory apodeme as in plate 13, figure 102. 



Types: Holotype cf , Great Salt Lake, Utah, June 8, 1915 (AI. C. 

 VanDuzee, CAS). "Neotype 9," mouth of Bear River, Utah July 11, 

 1915 (A. W. Wetmore, in the U.S. Biological Survey Collection) 

 [designated by Cole, 1923, p. 48]. 



Distribution: This is a fairly common species which is apparently 

 restricted to the Great Salt Lake Basin or Lake Bonneville area of 

 Utah. The published records from Utah besides the type localities 

 are Goshen, Spanish Fork, Saltair, and Locomotive Springs. The 

 California specimen cited by Sabrosky (1948, p. 420) as rufoabdomi- 

 nalis has been examined and found to be a teneral female of adaptatus, 

 new species. 



New DISTRIBUTION records: (87 specimens, 18cf , 699.) 



Utah: 4cf' 68 9 , Gun Club Lakes, Salt Lake City, Aug. 22, 1955 (L. T. Nielsen, 

 G. C. CoUett, UU, EIS), some collected on Scirpus species; Icf, Salt Flats (N. 

 Fisher, UU); 3cf, West Salt Lake (Telford, UU) ; Id', Salt Lake City, July 31, 

 1948 (Knowlton and Houck, USAC) ; 1 9 , Hot Sprmgs, June 4, 1934 (Knowlton 

 and Rowe, AMNH); Id, Ogden, June 15, 1942 (S. L. Wood); Id', June 20, 1937 

 (D. E. Hardy); Id', Provo, June 15, 1948 (G. F. Knowlton); 2 d', Payson, Aug. 13, 

 1943 (Knowlton and Maddoch) ; 1 d', Aug. 1 (Knowlton and Stains) ; 2 d", Brigham, 

 June 10, 1938 (Knowlton et al.) ; Id', Far West, Aug. 10, 1938 (Knowlton and 

 C. F. Smith) [all in USNM or USAC]. 



Seasonal occurrence: Males and females have been collected 

 from May 21 (Saltair) to August 22 (Salt Lake City). Since both 

 sexes have been taken together from May 21 to August 22, it would 

 seem that a much longer flight period might be expected, possibly 

 April to September. 



Recorded hosts: None. 



Biology: Unknown. 



