196 PROCEEDINGS OF THE ACADEMY OF [1899. 



with coarse irregular transverse rugae extending to, but not on, the 

 sides, and are weakest in the depressed portion of upper surface ; the 

 latter is scarcely separated from the posterior face or vertical part, 

 the two uniting rather evenly; transverso -median fold distinct, 

 short and rather high; lateral teeth not strong, blunt; stigma- 

 tubercle obtuse, rounded ; horizontal surface not rugose. Abdomen 

 fusiform narrowest anteriorly; fourth and fifth ventral segments 

 highly polished, entirely nude; subgenital plate a little widened 

 apically and truncate, not keeled; third submarginal cell at top 

 somewhat broader than at base. Length, 16 mm. 



Rio Grande do Sul. One example. Allied to and resembles 

 P. dimidiata Fabr. , but the abdomen lacks the ventral bristles, and 

 the wing fascia is widely separated from base of wings. 



Pepsis pulchripennis Mocs. 

 Pepsis dimidiata Fabr. 

 Pepsis clirysoptera Burm. 

 Pepsis aurimacula Mocs. 



Rio Grande do Sul and Estado do Sao Paulo. 



Pepsis vitripennis Sm. 

 Pepsis amabilis Mocs. 

 Pepsis planifrons R- Luc. 

 Pepsis pubiventris R- Luc. 

 Pepsis discolor Tasch. 



Rio Grande do Sul and Ypiranga. 



Pepsis sinnis R. Luc. 



Salius (Cyphononyx) notatipennis n. sp. 



?. — About equally blue and black; head black, shining; thorax 

 and legs changing from blue to black in certain lights ; abdomen 

 black, with blue pile on basal segments; wings fuscous, more or less 

 yellowish — all the cells except median and submedian spotted with 

 yellow, costal cell and base of wing blackish, apex subhyaline; hind 

 wings yellow, darker apically; head sparsely punctured, with four 

 depressed ai-eas, one at each side of front and another between 

 ocelli and eyes; antennae short and thick; clypeus transverse, 

 coarsely punctured anteriorly, subtruncate, bearing a few long 

 black hairs; pronotum almost square anteriorly; middle seg- 

 ment subtruncate, in shape lather square, coarsely striated, the 

 upper surface depressed medially and more broadly near sides, the 

 postero-lateral angles rather prominent; the pile on first two dorsal 



