REVISION OF GENUS EUCERCERIS CRESSON 



39 



19. Eucerceris melanovittata Scullen 



Figures 23, 77 a, b, c, d, e, f, g 

 Eucerceris melanovittata Scullen, 1948, pp. 156, 164, figs. 4a, b, c, 14; 1951, p. 1012. 



This species was described by the writer in 1948 (p. 164) from 

 seven male specimens. Since that time 41 additional males have been 

 determined. In addition to the above males two females have recently 

 been recognized. The female is described below: 



Female. — Length 15 mm. Black and ferruginous with light yellow 

 markings; pimctation and pubescence average. 



Head subequal in width to the thorax; black and ferruginous 

 except large frontal eye patches, large patches on the lateral and 

 medial clypeal lobes, large patches on the genae, small evanescent 



Figure 22, Eastern Mexico. E. melanosa, new species 



spots on the vertex and lateral spots on the base of the mandibles, 

 all of which are hght yellow; the following parts are ferruginous: 

 lower part of the medial lobe of the clypeus, most of the genae ex- 

 clusive of the yellow patch, the basal half of the mandibles, and the 

 basal third of the antennae; the black vittae of the face extend through 

 the antennal scrobes to the ventral border of the clypeus; mandibles 

 with one medial denticle; antennae normal in form. 



Thorax black and ferruginous except a band on the pronotum 

 extending onto the posterior lobe, a broad band deeply emarginate 

 on the scutellum, the metanotum, large patches on the propodeum, 

 a patch on the pleuron, four small patches on the sternum and large 

 spots on the tegulae all of which are hght yellow; ferruginous areas 

 include most of the pleura, most of the sternum, the surrounding 

 border of the yellow patches on the propodeum and most of the 

 tegulae; tegulae normal in form; enclosure with a medial groove and 



