420 PK0CEEDING3 OF THE ACADEMY OF [1899. 



liues on middle segment, spot beneath wings, anterior legs almost 

 entirely, medial legs in front, line at apex of petiole, interrupted 

 medially, narrow line before apex of second and third dorsals, and 

 of second ventral, yellow; antennse fulvous, darkest above, the 

 fore femora in front and a spot on tegulee, reddish; medial legs 

 dark brownish behind; wings dark subhyaline, darkest along costal 

 margin. 



9. — Head finely and closely punctured above, the front striato- 

 punctate, but not coarsely; cheeks impunctate; clypeus rather 

 finely striato-punctate, barely one-third broader than long, some- 

 what hexagonal, with the side lying between the lateral angle and 

 anterior margin strongly incurved, anterior margin obtusely trun- 

 cate, not at all dentate; flagellum subclavate, the first joint shorter 

 than the two following united, the scape about as long or slightly 

 longer than the pedicel and following three joints united; space 

 between hind ocelli about equal to half that between them and 

 eyes; thorax elongate, narrowed anteriorly, the distance between 

 the anterior margin of tegula and pronotal angle greater than 

 the width of dorsulum at widest part; pronotum sharply margined, 

 subangulate at sides, with separated punctures; dorsulum and 

 scutellum finely striated longitudinally; postscutellum indistinctly 

 carinated at sides; middle segment concave or depressed medially, 

 rugose but not coarsely, with a carina originating near each side 

 of postscutellum and diverging toward sides, which are smooth 

 except in the region of the obtuse lateral carina where there are 

 some coarse punctures ; stem of petiole short and thick, not equal- 

 ling hind coxa and trochanter in length, the enlarged portion of 

 petiole broadly ovate, widest toward base, finely punctured medially 

 and coarsely so at sides; second segment above with fine compact 

 punctures, beneath with large separated ones, the pedicel short and 

 thick ; the third dorsal is margined apically with a thin membrane 

 which is emarginate near each side; radial side of second submar- 

 ginal cell slightly greater than the distance between the first trans- 

 verso-cubital and the first recurrent nervures on the cubital 

 nervure; third submarginal cell somewhat rhomboidal, the outer 

 nervure sinuous. Length 12^ mm. 



Chapada. One specimen. In coloration this species is quite simi- 

 lar to Z. miniatus, but it is not closely related to that insect. The 

 peculiarly shaped accessory membrane of third dorsal segment is 



