64 OETHOPTERA. 



a trifle narrowed in front, the last transverse sulcus a little behind the middle. Hind femora as long as 

 the tegmina, which reach the tip of the abdomen, moderately robust at the base. 

 Length of body, $ , 36 ; of antennae 12, of pronotum 7, of tegmina 27, of hind femora 24 millim. 



Hab. Mexico, Medellin in Vera Cruz (Bev. T. Heyde) ; Guatemala, Panzos in 

 Vera Paz (Conradt). 



A female from Panzos, and a male from Medellin. 



This insect is considerably larger than any other representative of the genus 

 that has thus far come into my hands. The absence of all indications of an 

 intercalary vein on the tegmina, as well as its robust build, readily separates it 

 from all the other known forms. The female described, selected as the type, shows 

 signs of having been in spirits, but this has not greatly modified its structure nor 

 changed its colour. 



The male from Medellin, on account of its size and the number of spines in the 

 outer row of the hind tibiae (13), may belong here. It is of a uniform pale brown 

 colour, inclining to olive on the head, pronotum, and pleura. The antennae are as 

 long as in A. auriventris and A. trinitatis, and the hind femora, together with the 

 base of the tibiae, are dark. The abdomen, however, lacks the orange or ferruginous 

 tinge to be found in both those species, being, instead, uniformly pale. Its length 

 is 25*5, antennae 13, tegmina 17, and hind femora 15 millim. 



[3. Amblytropidia australis, Bmner. 



Amblytropidia ferruginosa, Giglio-Tos, Bollet. Mus. Zool. ed Anat. Comp. Univ. Torino, ix. 



no. 184, p. 13 (Sept. 1894) x ; op. cit. xii. no. 302, p. 25 (Aug. 1897) (nee Stal) 2 . 

 Amblytropidia australis, Bruner, Locusts o£ Argentina, p. 32 (1900) 3 . 



Hab. Argentina 1-3 . 



This species occurs in Argentina along the K-io Parana to its mouth ; also northward 

 and westward to the Bolivian frontier, if we accept Professor Giglio-Tos's identification 

 as recorded above.] 



[4. Amblytropidia vittata, Giglio-Tos. 



Amblytropidia vittata, Giglio-Tos, Bollet. Mus. Zool. ed Anat. Comp, Univ. Torino, ix. no. 184, 

 p. 13 (1894) \ 



Hab. Bkazil; Paraguay 1 . 



A. vittata occurs at Sao Paulo, Brazil, as well as in Paraguay, several specimens 

 from the former locality having been received by me. Both this and the preceding 

 species can be recognized by their unusually short antennae, as well as by the generally 

 pale testaceous colour, more or less relieved by green, dark brown, or black streaks on 

 the head, pronotum, and tegmina. Other characteristics which distinguish them are 

 mentioned in the synoptic table.] 



