1899.] NATURAL SCIENCES OF PHILADELPHIA. 427 



rated punctures, except the base which is smooth, stem almost as long 

 as the apex of petiole is wide, more slender than in allied forms; 

 second submarginal cell with no radial side in consequence of the 

 union of the first and second transverso-cubital veins above; third 

 submarginal widest above, the outer uervure nearly straight. 

 Length Hi mm. 



Var. — Much more coarsely sculptured; no yellow on legs; a 

 small radial side on second submarginal cell, the third submar- 

 ginal but little widened above. Length 12 mm. 



Santarem; Mararu. Two specimens, that representing the va- 

 riety coming from the latter locality. 



Zethus miniatus Sauss. 



Uacarizal, February; Chapada, March; Corumba, April. 

 Three ?, four d' specimens. 



Zethus carinatus Sm. 



Twentv-four specimens; Chapada, January, February, Novem- 

 ber; Corumba and Pedra Branca, April. This insect is evidently 

 very similar to Labus Sichellanus Saussure. Both sexes have 

 4-joiuted labial palpi. 



AA. Pedicel of second segment longer than width of first segment 

 at apex. 



Zethus punctatus n. sp. 



Black ; spot on each side of face, dot on pronotum laterally, line 

 on postscutellura, two stripes on middle segment, short line on sides 

 of petiole at apex, and two dots at base of pedicel of second 

 segment; an extremely narrow fine at apex of dorsals 2-5, and two 

 dots on segment 6 sometimes, yellow ; stripe on all the tibiae, and 

 fore femora anteriorly on the tibiae and tarsi entirely, yellow or 

 fulvous ; wings cseruleous. The abdominal maculation is variable. 



9. — Front with coarse confluent punctures, becoming more sepa- 

 rated and shallow on the vertex ; cheeks smooth or finely punctured 

 posteriorly, coarsely punctured near base of mandibles, and less 

 coarselv along the eye margin ; clypeus not quite twice as broad as 

 long, with coarse, shallow punctures, the fore margin broadly 

 truncate medially, not dentate; flagellum subclavate, the first 

 joint about as long as the two following united; space between 

 hind ocelli about equal to that between them and eyes ; pronotum 



