210 PROCEEDINGS OF THE ACADEMY OF [Part II 



Measurements {in millimeters). 



Length of Length of Width of Length of Width of 



cf body pronotum pronotum tegmen tegmen 



La Forestiere, French Guiana 23 . 2 6 . 10.9 20 . 5 ^ 8.4 

 St. Jean du Maroni, French 



Guiana 21. 6.3 10.8 20. 8. 

 9 



La Forestiere, French Guiana 22.6 6.7 12.3 20.2 9. 

 St. Jean du Maroni, French 



Guiana 23. 7. 12.1 20. 9.7 



Para, Brazil 22.6 6.9 11.8 19.6 9. 



ZETOBORELLA new genus. 



This genus is erected to include the smallest and one of the most 

 remarkable species of those referable to the genus Zetobora and its 

 allies. 



In addition to the small size, the present genus is distinctive in 

 the extremely transverse pronotum, with latero-caudal angles bi- 

 emarginate, the caudal emargination being conspicuous. This 

 shows a further development of the type found in Zetobora emargin- 

 ata Burmeister. The pronotum has the cephalic margin very 

 broadly convex, without being broadly though conspicuously re- 

 flexed, in the latter respect agreeing with species of Tribonidium. 

 The pronotal surface is distinctive in being smooth and polished 

 over its greater portion, the remaining areas impresso-punctate. 

 The tegmina are suddenly emarginate mesad, when at rest leaving 

 the lamellate lateral marginal portions of the third to sixth tergites 

 exposed. The tegmina, though broad, are, as in Tribonidium, much 

 narrower than in Zetobora. 



Genotype. — Zetoborella gemmicula new species. 



Generic Description. Size very small for the group, form broad, 

 but with tegmina much narrower than in Zetobora. Head flat, with 

 face broadly and shallowly concave, dorsal outline semicircular, 

 width between the reduced eyes considerable. Ocelli represented 

 by shallow but moderately large concavities. Distal joints of 

 maxillary palpi very short, the last broad. Pronotum with cephalic 

 margin very broadly convex, caudal margin transverse, latero- 

 caudal angles bi-emarginate ; surface weakly ti'ilobate, showing very 

 feeble reflection toward the lateral portions of the cephalic margin 

 and none mesad, surface smooth and shining except latero-caudad 

 and mesad toward the caudad margin, where it is impresso-punctate. 

 Mesonotum impresso-punctulate in the exposed scutellar area. 

 Tegmina and wings well developed, showing very slight reduction 

 in the female sex. Tegmina with very Inroad and short marginal 

 field, the scapular field narrowing suddenly and very strongly 

 proximad, discoidal field with veins and numerous cross-veins mod- 



