REVISION OF GENUS EUCERCERIS CRESSON 19 



Types. — The type 9 and allotype cf were taken 17 mi. NE. of 

 San Luis Potosi, S. L. P., Mexico, at about 6,200 ft. elev. on Baccharis 

 glutinosa, Sept. 6, 1963 (H. A. Scullen and Duis Bolinger). The type 

 female and allotype male of E. baccharidis Scullen are at the U.S. 

 National Museum, no. 69226. 



Paratypes.— MEXICO:?, 1.5 mi. S. Fresnillo, Zac, Aug. 6, 1954 (E. G. 

 Linsley, J. W. MacSwain, R. F. Smith); c?, 4 mi. SW. San Luis Potosi, 6,500 

 ft. elev., Sept. 4, 1963 (Scullen and Bolinger); 62? ?, 91 cf cf 17 mi. NE. of San 

 Luis Potosf, S. L. P., Sept. 6, 1963, 6,200 ft. elev., on Baccharis glutinosa (Scullen 

 and Bolinger); cf, 15 mi. N. Saltillo, Coah., 4,450ft. elev., Sept. 9, 1963 (Scullen 

 and Bolinger). 



Distribution. — State of San Luis Potosi and one record from 

 Coahuila, aU from Mexico. 



Prey record. — None. 



Plant record. — Baccharis glutinosa. 



6. Eucerceris baja, Scullen 



Figures 6, 64 a, b, c 

 Eucerceris baja Scullen, 1948, pp. 170-171. 



Male. — The male only was described in 1948. The following speci- 

 mens have been examined by the author since the above publication: 



MEXICO: Baja California: 2cfcr', 10 mi. E. of Bahia San 

 Quintin, Sept. 9, 10, 1955 (F. X. Wilhams); 12 cf cT, 28 mi. SE. of Arco, 

 Rancho Santa Marguerita, July 3, 4, 1960 (A. E. Michelbacher). 



The female is still unknown. 



Type. — The holotype male from 20 mi. N. of Mesquital, Baja 

 Cahfornia, Mexico, Sept. 27, 1941 (Ross and Bohart), is at the Cal- 

 ifornia Academy of Sciences. 



Distribution. — Known only from the records published by the 

 author in 1948 and above from Baja California. 



Prey records. — None. 



Plant records. — None. 



7. Eucerceris barri, new species 



Figures 7, 65 a, b, c, d, e, f, g 



Female. — ^Length 10 mm. Black with creamy white markings; 

 punctuation somewhat less crowded than average; pubescence sparse 

 and very short. 



Head slightly wider than the thorax, black except for irregular 

 frontal eye patches, a medial spot above the antennal scrobes and 

 a slightly elongate spot back of the eye, all of which are creamy 

 white; clypeal border with low single denticles on the medial lobe 

 near the fusion with the lateral lobes, a low carina^connects these 



