Bruner: Tropical American Tettigonoidea. 347 



Lichenochrus vuUuriniis Brunner, Mon. Pseudophyll., 125, 127 (1895). 

 Conocephalus trifidus Thunberg, Mem. Acad. Petersb., V, p. 277 (1815). 



Habitat. — A single female specimen, which according to the synoptic 

 table is referable to the genus Lichenochrus, is classified as vnlturinus 

 with some doubt. It bears the label, "Presented as from S. 

 America." 



Genus Acanthodis Serville. 



Acanihodis Serville, Ann. Sci. Nat., XXII, p. 150 (1831); lb. Ins. Orth., p. 450 

 (1839); BuRMEiSTER, Handb. Ent., II, p. 699 (1838); Blanchard, Hist. Nat. 

 Ins., Ill, p. 21 (1840) nee Stal. 



Brisilis Stal, (Efv. Vet.-Akad. Forh., XXX, (4) p. 46 (1873); lb., Recens. Orth., 

 II, pp. 62, 78 (1874); Brunner, Mon. Pseudophyll., pp. 16, 132 (1895). 



This is also a strictly South American genus of the Pseudophyllidae. 

 All of the described species of the genus are large protectively colored 

 insects, which live about the trunks of trees, to the bark of which they 

 show a remarkable similarity in appearance. There are two species 

 among the material now in hand. One of these seems to be new. 

 The following table will assist in recognizing the species including 

 the new one: 



Synopsis of the Species of Acanthodis. 

 A. Metazona of pronotum bituberculate on both sides. Wings tessellate, with- 

 out transverse veins in the pallid maculations. Hind femora ornamented 

 on the inner face with a black vitta. 

 b. Ovipositor not longer than the hind femora. 



c. Pronotum with the hind margin subangulated, lateral tubercles of the 



metazona very distinct aquilina Linnaeus. 



cc. Pronotum with the posterior margin rounded, lateral tubercles of the 



metazona somewhat obsolete curvidens Stal. 



bb. Ovipositor much longer than the hind femora. 



c. Smaller. (Tegmina of female 70 mm.) longicauda Stal. 



cc. Larger. (Tegmina of female 82 mm.) gigantea sp. nov. 



A A. Metazona of pronotum unituberculate. Wings unicolorous, infuscated, the 

 transverse veins equally arranged. Posterior femora unicolored on the 

 inner face, pale. 

 b. Front together with the sternum black. Mesosternum with its anterior 



angles obtuse tenebrosa Brunner. 



bb. Front and sternum pallid. Mesosternum with its anterior angles produced 

 into a spine nnicolor Brunner. 



81. Acanthodis gigantea sp. nov. 

 Size maximum. General structure and color as described for 

 longicauda. 



Length of body, 9 , 57 mm., of pronotum, 13 mm., of tegmina, 82 



