Vol. XXV] ENTOMOLOGICAL NEWS. 397 



Catalogue of the Membracidae of Uruguay 

 (Hemip., Homop.). 



By FREDERIC W. CODING, Guayaquil, Ecuador. 



The Membracidae are insects belonging to the order Hemip- 

 tera, sub-order Homoptera, which includes the Cicadidae, Ful- 

 goridae, Cercopidae, Psyllidae, Aphididae and Coccidae. As 

 a general rule they are easily separated by the well-developed 

 prothorax into a multitude of shapes and forms. 



To facilitate the identification of the different species found 

 in Uruguay, the following synoptic table has been prepared: 



1 (28). Tibiae simple, not broadened or flattened. 



2 (15). Third apical area of tegmina elongate, base truncate, never 



petiolate Subfamily DARNINAE. 



3 (8). Posterior process covering all or nearly all of tegmina; 



destitute of horns ; convex, smooth, median carina obsolete. 

 ^ (7). Form robust; ocelli distinctly nearer to each other than to 

 the eyes. 



5 (6). Lateral yellow border of prothorax originating behind eyes, 



extends nearly to apex, and occupies nearly half of sides 

 of prothorax Stictopclta latllinca. 



6 (5). Lateral yellow border of prothorax originating behind 



humeral angles, terminates at apex of posterior prothoracic 

 process, occupying very narrow edge. . . .Stictopclta liiubata. 



7 (4). Form slender; ocelli nearly equi-distant from each other 



and the eyes Cryptoptera acutula. 



8 (3). Tegmina almost wholly uncovered. 



9 (14). Corium of tegmina with two discoidal areas. 



10 (11). Prothorax elevated in front, armed with a sharp horn ex- 



tended outward above each humeral angle ; ocelli nearer to 

 each other than to the eyes Pyranthc acaciac. 



11 do). Prothorax depressed in front, armed in front with a horn 



turned downward ; ocelli nearer to the eyes than to each 

 other. 



12 (13). Front horn obtuse at apex, not spatulate, median carina of 



which is much more elevated than lateral edges ; upper sur- 

 face of horn not bi-sulcate Arc/ante incuiiibcns. 



13 (12). Front horn broadly spatulate at apex, its median carina 



equal to elevation of lateral edges forming on each side a 

 distinct longitudinal sulcus Argantc trcmnlaris. 



14 (9). Corium of tegmina with one discoidal area; prothorax un- 



armed, with a median carina, posterior process acute, 



Smiliorhachis proxima. 



