no CALIFORNIA ACADEMY OF SCIENCES. 



finer than those of the petiole, sparse on anterior portion 

 and very close qiid still finer on apical portion, the apical 

 margin greatly thickened; petiole beneath with stronger 

 punctures than above. Black, including the scape en- 

 tirely; tegular, apex of femora and tibia? and tarsi, dull 

 red; basal third of clypeus, spot above the antenna?, small 

 spot on posterior orbits, line, narrowed medially, on fore 

 margin of prothorax, spot beneath tegula?, postscutellum, 

 spot at top of each convexity of the metathorax, apical 

 margins of the first to fourth abdominal segment, small 

 spot on each side of petiole just behind the middle, 

 and an elongate mark on each side of the second segment, 

 all yellow; head and thorax rather densely clothed with 

 pale fuscous pubescence ; abdomen with sericeous pile; 

 wings subhj^aline, darker along the costa and in the 

 marginal cell, nevures black. Length 14 mm. 



3 . — Clypeal teeth prominent, triangular, the notch 

 deeper; scape and antennal spine black; ver}' similar to 

 the? ; clypeus entirely yellow; spots on metathorax small; 

 marked otherwise as in the ? ; the middle femora above, 

 in both sexes, at the apex, sometimes are yellow. Length 

 13 mm. 



El Taste, 4,200 feet; San Jose del Cabo, October. 

 Seven specimens, including several examples of the nest. 

 The markings seem to be unusually constant. It re- 

 sembles mostly E. coloradcnsis Cress., but differs not 

 only by the color of legs and scape, but also by its more 

 compact sculpture ; from fratcrnus it is easily distin- 

 guished; from globiilosus it differs by its much finer 

 sculpture of petiole ; and the width of petiole and dis- 

 tribution of markings are quite different from E . itiirbide 

 Sauss. 



MoNOBiA cALiFORNicA Sauss. El Tastc, 3,200 feet. 

 One specimen. 



