410 Annals of the Carnegie Museum. 



Habitat. — Specimens of an insect coming from the following locali- 

 ties have been referred somewhat doubtfully to this species: Corumba, 

 Brazil, April, one female, Piedra Blanca, April, two males and one 

 female, all presumably having been taken by H. H. Smith. All 

 four of the specimens are rather strongly infuscated in their general 

 coloring and may belong to a distinct species. 



A fifth specimen, a female, is also present. This last one bears the 

 label " Bahia (West Side), Brazil, Oct. 26, 1907, by sweeping in reeds 

 and grass in a swampy place near the sea, J. D. Haseman." Possibly 

 the true A. pallens, since it agrees better with StSl's characterization 

 of the species. 



Genus Symphyloxiphus Rehn. 

 Symphyloxiphus Rehn, Proc. U. S. Nat. Mus., XXX (1906), p. 603. 



Symphyloxiphus is another of the tropical American genera of the 

 Trigonidiidae which is very apt to be found in the region covered by 

 this paper. It is related to the preceding genus, from which its 

 members differ as indicated by the generic synopsis given on a preced- 

 ing page. Only a single species, 5. magnificum Rehn, has been 

 described thus far. It comes from Costa Rica. 



Genus Thamnoscirtus Saussure. 



Thamnoscirlus Saussure, Mem. Soc. Geneve, XXV (1878), p. 490; Kirby, Syn. 

 Cat. Orth., II (1906), p. 84. 



The little crickets referred to the present genus look more like 

 coleopterous insects than like gryllids. They move about rather 

 rapidly over the vegetation, as do the insects they resemble. In color 

 they are black, blue, green, or yellow, and more or less streaked or 

 dotted as are tiger-beetles. They are confined to tropical America 

 and chiefly, but not entirely, to the countries in the northern parts of 

 South America. Five species have been described. 



84. Thamnoscirtus cicindeloides (Gerstaecker). 



Phylloscyrtus cicindeloides Gerstaecker, Stett. Ent. Zeit., XXIV (1863), p. 428; 



Saussure, Miss. Mex., Orth., (1874), p. 369. 

 Phylloscirlus vitlalus Burmeister, Abhandl. Ges. Halle, XV (1880), p. 18. 

 Thamnoscirtus cicindeloides Saussure, Mem. Soc. Geneve, XXV (1878), p. 491, 



PI. 16 (XLVI) figs. I, le, a, h\ Kirby, I. c. 



Habitat. — There are specimens of both sexes at hand. They come 

 fr(jm Chapada, Para, and Santarem, Brazil, and were collected during 

 the months of December, January, April, and June (H. H. Smith). 



