PEIONOEOPHA.— TKOPINOTUS. 225 



Pamphagus serratus, Thunb. Mem. Acad. St. Petersb. v. p. 260 (1815) \ 



Xiphocera serrata, Burm. Handb. Ent. ii. p. 614 (1838) \ 



Tropinotus serratus, Serv. Hist. Orthopt. p. 618 (1839) 5 . 



Acrydium serralo-fasciatum, DeG. Mem. Ins. iii. p. 495, t. 42. fig. 2 (1773) \ 



Pamphagus lateralis, Thunb. Mem. Acad. St. Petersb. v. p. 260 (1815) \ 



Prionolopha serrata, Stal, Recens. Orthopt. i. p. 44 (1873) 8 . 



Eab. Tropical South America 1_8 ; Trinidad (Tryhane, Chipman). 



TROPINOTUS, Serville. 



Tropinotus, Serv. Hist. Orthopt. p. 617 (1839); Bruner, Proc. U.S. Nat. Mus. xxx. p. 645 (1906). 

 Tropidonotus, Stal, Syst. Acrid, i. p. 14 (1877). 



This is another characteristic South-American genus that is represented north of the 

 Isthmus of Panama. At least fifteen or sixteen species are already known to science, 

 and additional forms no doubt occur in the vast unexplored forests of Brazil and other 

 tropical portions of the country lying to the east of the Andes. Two species only are 

 known to me from within our region. 



1. Tropinotus rosulentus, Stal. 



Trapidonotus rosulentus, Stal, Bihang till K. Svens. Vet.-Akad. Handl. v. no. 9, p. 19 (1878) \ 

 Tropidonotus rosulentus, Pict. et Sauss. Cat. Acrid, i. p. 5 (1887) 2 ; Bruner, Bull. Lab. Nat. Hist. 



Univ. Iowa, iii. p. 64, t. 3. fig. 5 (1895) 3 . 

 Tropinotus rosulentus, Bruner, Proc. U.S. Nat. Mus. xxx. p. 645 (1906) *. 



Eab. Nicaragua (Rev. T. Eeyde s ); Costa Hica, Pozo Azul (C. F. Underwood & 

 M. A. Carriker). — Colombia x 2 . 



2. Tropinotus mexicanus, Bruner. (Tab. III. fig. 2, ? .) 



Tropinotus mexicanus, Bruner, Proc. U.S. Nat. Mus. xxx. p. 645 (1906) \ 



This species belongs to the group in which the pronotal crest is more or less strongly crenulate, and is 

 related to both T. discoideus, Serv., and T. angulatus, Stal. Prom T. discoideus it differs in the much 

 shorter and more robust hind femora, and the broader pronotum, in which the different sections of the 

 crest are attingent or approximate, instead of distinctly separated ; and from T. angulatus by the broader 

 and shorter wings, and the higher and more strongly arched pronotal crest, as well as in the greater 

 disparity between the sizes of the sexes. 



General colour varying from a pale testaceo-cinereous tinged with green to a dark brownish-lavender, the 

 dusky transverse bars of the tegmina in some specimeus very prominent and in others represented only 

 in outline ; the scattered tubercles of the pronotum always black or black-tipped. 



Length of body, S 30-32, $ 47-50 j of pronotum, 6 12, $ 18 ; of tegmina, J 25, $ 36 ; of hind femora, 

 <5 19, $ 27 millim. 



Eab. Mexico, Vera Cruz (Rev. T. Ileyde l ), Temax and other localities in Yucatan 

 (Gaumer l ). 



This locust appears to be the most northerly distributed species of Tropinotus, and is 

 likewise the most robust in form. The described members of the genus are tabulated 

 biol. centr.-amer., Orthopt., Vol. II., May 1907. 2 Gg 



