38 U.S. NATIONAL MUSEUM BULLETIN 268 



Abdomen ferruginous except for a broad emarginate band on 

 tergum 1, wide but deeply and broadly emarginate bands on terga 2, 

 3, and 4, a broad band with an elongate narrow patch of ferruginous 

 on tergum 5, and irregular patches on sterna 2 and 3, all of which 

 are yellow infused with ferruginous; pygidium with sides slightly 

 convex tapering to a small rounded apex. 



Male. — Unknown. 



Type. — The 9 type is from La Paz, Baja Cahfornia, Mexico, 

 Oct. 12, 1954 (F. X. WilHams). Deposited at the California Academy 

 of Sciences. 



Para TYPES. — MEXICO: 9 Santo Domingo, Baja California, Nov. 16, 1941 

 (Frank Gander); ?, "Basse-Californie Diguet 178-95." 



DiSTKiBUTiON. — Kjiown only from Baja California, Mex. 

 Prey records. — None. 

 Plant records. — None. 



18. Eucerceris melanosa Scullen 



Figures 22, 76 a, b, c 

 Eucerceris melanosa Scullen, 1948, pp. 156, 163, figs. 3a, b, c, 13; <f • 



Male. — The male was described in 1948 from a single specimen. 

 A limited number of specimens has been taken since then. 



Female. — The female of E. melanosa Scullen has never been rec- 

 ognized. E. menkei Scullen, being described in this paper, has color 

 markings similar to E. melanosa Scullen and may prove to be the 

 female of that species. 



Type. — The holotype male of E. melanosa Scullen is at the Uni- 

 versity of Minnesota. It was taken at Tehuacan, Pueb., Mexico, 

 July 12, 1935 (A. E. Pritchard). 



Distribution. — This species was described (Scullen, 1948, p. 163) 

 from the unique male. Since that time eight additional males have 

 been recorded as listed below. The female has not yet been recognized. 

 Specimens are as follows : 



MEXICO: d", Calcaloapan, Pueb., Aug. 26, 1962, (F. D. Parker); 2d'c?', 

 same locality, Aug. 20, 1963, (Parker and Stange) ; d', Mexico, D. F., Aug. 26, 

 1928 (G. Lassmanu); cf, 38 mi. SE., Oaxaca, Oax., 5,600 ft. elev., Aug. 19, 

 1963 (Scullen and Bolinger) ; 3cf cf, 4 and 5 mi. W. of Pachuca, Hdgo., 7,900 ft. 

 elev., June 16, 1961, Aug. 25, 1962, (Roberts and Nauman) ; cf , 41 mi. N. Que- 

 retaro, Qro., 6,500 ft. elev., Sept. 19, 1963 (Scullen and Bolinger); 2d'd', 18 mi. 

 W., Tehuacan, Pueb., 6,200 feet elev., Sept. 5, 1957 (H. A. Scullen). 



Prey records. — None. 

 Plant records. — None. 



