62 U.S. NATIONAL MUSEUM BULLETIN 2 68 



terga 2, 3, and 4, the sides of tergum 6, bands on sterna 3 and 4, and 

 evanescent patches on sternum 5; pygidiiim mth slightly convex 

 sides converging to a small rounded apex. 



Male. — Length 13 mm. Ferruginous with limited areas darker 

 and with light yellow markings; punctation average. 



Head subequal in width to the thorax, ferruginous with a narrow 

 darker patch bordering the eye near the vertex and the apices of the 

 mandibles which are dark fuscous; face ferruginous except for broad 

 lines through the antennal scrobes, an evanescent patch back of the 

 eye, patch on base of mandible and spot on the scape, all of which 

 are yellow; clypeal border with three denticles, the medial one the 

 largest; mandibles without denticles; antennae normal in form, fer- 

 ruginous basally with a trace of yellow on the scape and darker 

 apically. 



Thorax ferruginous becoming darker along the anterior and post- 

 terior margins of the mesoscutum and on the enclosure; light yellow 

 markings as follows: band on prothorax extending onto the posterior 

 lobe, angular patches on the pleuron, small patches on the tegulae, 

 an evanescent band on the scutellum, the metanotum, and large 

 patch on the propodeum; tegulae low and smooth; enclosure smooth 

 except for a medial groove and short ridges extending out from the 

 meson, mesosternal tubercle absent; legs ferruginous except for elon- 

 gate patches on the fore and mid tibiae, and evanescent small patches 

 on femora, all of which are yellow; wings subhyaline except for the 

 usual clouded area along the anterior margin; 2nd submarginal cell not 

 petiolate. 



Abdomen ferruginous with wide yellow bands on terga 1 to 5, and 

 sterna 3, 4, and 5, depressed area on tergum 2 small and ferruginous; 

 depressed areas on terga 3, 4, and 5 fuscous; an evanescent yellow 

 patch on sternum 1 and broken band of yellow on sternum 5, long 

 rows of long loose bristles on sterna 3 and 4, a short row of short 

 fused bristles on sternum 5; pygidium as illustrated (fig. 90g). 



E. sonorae Scullen is very close to E. canaliculata (Say) in structure, 

 size and color pattern. The females of the former species are easily 

 distinguished by the prominent process on the frons just above the 

 epistomal suture and the medial pair of denticles on the clypeal 

 border which are relatively larger than on E. canaliculata (Say). 

 The elevations on the lateral lobes of the clypeus of sonorae Scullen 

 are relatively short compared to those on most females of canaliculata 

 (Say). The males of sonorae ScuUen and of canaliculata (Say) are 

 indistinguishable except by association with the female. 



Types. — ^The type 9 and allotype cf" of E. sonorae Scullen are from 

 32 mi. SE. of Guaymas, Son., Mexico, 125 ft. elev., Sept. 23, 1963 



