Fulgoroidea—Tropiduchidae 
25 
Type L[adella] 'pallida 1915 Melichar, Verh. Naturf. Ver. Briinn 53: 
105. 
Type Monopsis pallida 1935 Osborn, Sci. Surv. Porto Rico and Virgin 
Islands 14: 203. 
Haplotype Monopsis pallida 1949 Fennah, Psyche 56: 56. 
Haplotype Monopsis pallida 1951 Caldwell and Martorell, Jour. 
Agr. Univ. Puerto Rico 34: 215. 
Ladella 1859 Stal, Berliner Ent. Zeit. 3: 319 [gen. n.] 
1866 Stal, Hemiptera Africana 4: 188 [Listed] 
1873 Marschall, Nomenclator Zoologicus 1873: 368 [Listed] 
1882 Scudder, Bull. United States Nat. Mus. 19: 166 [Listed] 
1914 Melichar, Monographic der Tropiduchinen 1914: 13 
[Key] :24 [Described] :140 [Listed] 
1915 Melichar, Verh. Naturf. Ver. Briinn 53: 94 [Key] :105 
[Described] :221 [Listed] 
1930 Schulze, Kiikenthal and Heider, Nomenclator Animalium 
3 (13): 1746 [Listed] 
1935 Osborn, Sci. Surv. Porto Rico and Virgin Islands 14: 203 
[Listed] 
1938 Metcalf, Bull. Mus. Comp. Zool. Harvard Coll. 82: 382 
[Key] 
1939 Neave, Nomenclator Zoologicus 2: 847 [Listed] 
1949 Fennah, Psyche 56: 52 [Listed] :55 [Key] :56 [Catalogued] 
1951 Caldwell and Martorell, Jour. Agr. Univ. Puerto Rico 
34: 215 [Key, described, key to species from Puerto Rico, 
catalogued] 
acunae Metcalf and Bruner 
1930 Ladella acunae Metcalf and Bruner, Psyche 37: l Cuba 
405; Pis. 21-24 [n. sp., illustrated] 1 2 Puerto Rico 
1935 Ladella acunae Osborn, Sci. Surv. Porto Rico and Virgin Islands. 
14: 204 [Notes] 2 
1936 Ladella acunae Wolcott, Jour. Agr. Univ. Puerto Rico 20: 96 
[Listed] 2 
1950 Ladella acunae Wolcott, Jour. Agr. Univ. Puerto Rico 32: 133 
[Listed] 2 
nepallata Caldwell 
1951 Ladella nepallata Caldwell and Martorell, Jour. ’Puerto Rico 
Agr. Univ. Puerto Rico 34: 217; PI. 36, Figs. 1, 
lc, h [Ecology, illustrated] 1 :216 [Key] :217 
[Comparative note] 
pallida Walker 
1851 Monopsis pallida Walker, List of Homopterous ’Jamaica 
Insects 2: 325 [n. sp.] 1 
