THE CANADIAN ENTOMOLOGIST. 117 



broadened at extreme sides; a broad fascia on second ventral segment 

 and two large spots on the third, also yellowish ; clypeus sparsely clothed 

 with pale hairs. Length, 10 mm. 



Grand Canon, Arizona, "70 miles North of Flagstaff." (C. H. Tyler 

 Townsend). Not closely related to any of our species. It comes nearest 

 to G. spilopterus and tricolor, but the sculpture is finer and the abdomen 

 differently shaped. It differs from the $ of tricolor in the dentate 

 mesosternum ; the $ of spilopterus is as yet unknown, but dentatus 

 differs too greatly to consider it the £ of that species. 



MlMESA MACULIPES. 



<$ . — Anterior margin of clypeus subtruncate, entire ; front with very 

 fine, close punctures, which become sparse on the vertex, and strongly 

 impressed medially ; ocelli very prominent, placed in a triangle, on each 

 side of the hind pair there is a strong depression; antennae rather long, 

 the flagellum clavate ; first joint of flagellum about one-quarter longer 

 than the second ; dorsulum with very fine punctures, almost impunctate; 

 suture between dorsulum and scutellum wide ; scutellum impunctate, 

 slightly impressed medially ; metathorax very strongly rugose ; the enclosed 

 space at base of metanotum with numerous, somewhat oblique ridges ; 

 petiole in length distinctly shorter than the hind femora, almost straight, 

 the upper surface with two widely separated furrows, on the sides the 

 petiole is broadly channelled ; remainder of abdomen impunctate, last 

 dorsal segment smooth ; black, the abdomen entirely so ; flagellum 

 beneath rufous ; apex of four anterior femora, the tibia? and tarsi, pale 

 testaceous ; hind tibiae, except base and apex, black ; face and clypeus 

 with bright silvery pubescence, wings hyaline, nervures and stigma black. 

 Length, 10 mm. 



So. Florida (C/ias. Robertson). Because of both recurrent nervures 

 received by the second submarginal cell, I have placed this in Mimesa. 

 It differs from all our species of that genus (?) by the entirely black 

 abdomen. In my opinion Mimesa is but a section of Psen. 



