REVISION OF GENUS EUCERCERIS CRESSON 17 



on Baccharis glutinosa (H. A. ScuUeu and Duis Bolinger). The type 

 female and allotype male are at the U.S. National Museum, no, 69225. 

 Paratypes. — MEXICO: State of San Luis Potosf: 7? 9, 21cf cT, 17 mi. 

 NE. of San Luis Potosl, Sept. G, 1963, 6,200 ft. elev., at Baccharis glutinosa 

 (H. A. Scullen and D. Bolinger) ; 5d^ cf, same locality, Oct. 3, 1957 (H. A. Scullen) ; 

 7cf cT, 10 mi. S\V., San Luis Potosi, 7,300 ft. elev., Oct. 1, 2, 1957 at Baccharis 

 glutinosa (H. A. Scullen); cf, 31 mi. NE., San Luis Potosf, 5,500 ft. elev., Oct. 3, 

 1957 (H. A. Scullen); d", 19 mi. SW. San Luis Potosi, 7,200 ft. elev., Oct. 4, 1963 

 at Baccharis glutinosa (H. A. Scullen and D. Bolinger); 4(^0^, 4 mi. SW., San 

 Luis Potosf, 6,500 ft. elev., Sept. 4, 1963, at Baccharis glutinosa (H, A. Scullen 

 and D. Bolinger). 



Distribution. — Known only from the state of San Luis Potosf, 

 Mexico. 



Prey record. — None. 



Plant record. — Baccharis glutinosa. 



5. Eucerceris haccharidisy new species 



Figures 5, 63 a, b, c, d, e, f 



Female. — Length 9 to 10 mm. Black \vith creamy white markings 

 and some leg parts fuHginous; punctation average; pubescence short. 



Head slightly wider than the thorax; black except frontal eye 

 patches, a patch on the medial and each lateral lobe of the clypeus, 

 an elongate patch between the antennal scrobes, an elongate area 

 back of the eye and a spot on the base of the mandible, all of which 

 are creamy white; clypeal border with a broadly based denticle at 

 the junction of the medial lobe and each lateral lobe, more acute 

 denticles at the meson, a 5th smaller denticle above the medial pair, 

 a cluster of five or six bristles above the medial pair and below the 

 medial single denticle; surface of the medial lobe of the clypeus 

 shghtly convex; mandibles with a prominent blunt denticle with a 

 smaller and more acute and basad denticle fused with it at its base; 

 antennae black and normal in form. 



Thorax black except for a solid band on the pronotum, two patches 

 on the scutellum, a solid band on the metanotum, an oval patch 

 on the propodeum, a patch on the pleuron below the "wing, four small 

 spots on the sternum mesad of the second and third coxae and a 

 smaU spot on the tegulae, all of which are creamy white; tegulae low 

 and smooth; enclosure mth a medial groove and ridged laterally 

 with the ridges subparallel to the matenotum but bending postero- 

 laterally; mesosternal tubercles a^jpearing as indistinct elevations; 

 legs black to the apical ends of the first two femori and the third 

 coxae, with prominent oval creamy white patches near the apical 

 ends of the first two pair of femori, the remaining more apical seg- 

 ments of all legs are fuliginous; wings subhyaline with the anterior 

 margins dark, second submarginal cell petiolate. 



