REVISION OF GENUS EUCERCERIS CRESSON 47 



of the border between which there is a cluster of bristles, a bilobed 

 extension appears mesad on the lower portion of the border; man- 

 dibles with a single large acute denticle with a broad base; antennae 

 dark apically, lighter basally, normal in form. 



Thorax black except a band on the pronotum extending onto 

 the posterior lobe, a deeply emarginate band on the scutellum, the 

 metanotum, large single patches on the propodeum, a triangular 

 patch on the pleuron and a spot on the tegulae, all of which are 

 creamy white; evanescent areas of light fuscous appear on the pleuron 

 below the light patches and at the meson of the scutellum; tegulae 

 normal in form; enclosure with a deep medial groove and heavy 

 lateral ridges subparallcl to the base; mesosternal tubercles present 

 but very small; legs ferruginous; wings subhyaline with a dark area 

 on the anterior border embodying the marginal cell and the apex 

 beyond. 



Abdomen black except for broad and emarginate bands on terga 1 



Figure 29. Rio Grande Valley. E. morula albarenae, new 

 subspecies 



to 5 which are creamy white and the basal parts of terga 1 and 2 which 

 are infused with ferruginous and all sterna which are ferruginous; 

 pygidium with sides slightly convex and converging to a rounded 

 apex. 



Male. — Length 11.5 mm. Black with creamy white markings on 

 the body; legs ferruginous with creamy white markings; punctation 

 average; pubescence very short. 



Head one seventh wider than the thorax ; black except for the entire 

 face exclusive of black lines through the antennal scrobes (the light 

 area fusing above the antennae), a light spot back of the eye, basal 

 parts of the mandibles and a minute spot on the scape, all of which 

 are creamy white to very light yellow; clypeal border with three dark 

 subequal denticles; mandibles without denticles; antennae normal in 

 form. 



Thorax black except for a broad band on the pronotum extending 

 onto the posterior lobe, an elongate patch on the episternum, an 

 emarginate band on the scutellum, the metanotum, large lateral 

 patches and small more medial spots on the propodeum, a pair of 



