138 Annals of the Carnegie Museum. 



features. They are also mostly nocturnal in their movements, and 

 many of them invariably lie hidden away during daytime among dead 

 leaves and other rubbish, which litters the floor of forests. Some 

 burrow into the earth, while still others hide beneath stones, fallen 

 trees, in crevices, and under loose bark, of in any other nook or cranny, 

 which offers concealment and protection from enemies and the light 

 of day. Many of the forms are likewise rather small, very active, and 

 live among the dense foliage of shrubs, bushes, vines, and trees, as 

 well as in the grasses and other herbage of prairies, meadows, and 

 swamps. A few burrow in the mud and damp sand of beaches, and 

 at the margins of streams, while a few are strictly aquatic. Some 

 species even live in and about the nests of ants, where they are both 

 tolerated and protected. 



The crickets, therefore, might be considered as being the most 

 highly developed of the saltatorial orthoptera, i.e., the farthest re- 

 moved from primitive types. 



The present collections do not happen to contain many representa- 

 tives of the group, although the region under consideration no doubt 

 is the habitat of a considerable nftmber of both genera and species. 



Family NEMOBIID^. 



Genus Nemobius Serville. 



Nemobius Serville, Ins. Orth., p. 345 (1839) and numerous authors since. For 

 references see Kirby, Syn. Cat. Orth.. II, pp. 13, 14. 



91. Nemobius sp.? 



There is but a single specimen of the Nemobiid group at hand. This 

 insect is referred to the genus Nemobius without trying to determine 

 the identity of the species. It also belongs with the collections made 

 by F. H. Hope at Batanga, and was taken in February, 1914. In size 

 this specimen is among the very smallest of the species of the genus, 

 likewise very slender, with caudate wings. 



Family BRACHYTRYPID^. 



Genus Brachytrypes (Serville). 



Brachytrupes Serville, Ins. Orth., p. 323 (1839); Bolivar, Ortopt. Espan., p. 276 



(1876); Ib., An. Soc. Espan. Hist. Nat.. VIII, p. 72 (1898). 

 Brachytrypes Agassiz, Nom. Zool. Ind. Univ., p. 52 (1846); Fischer, Orth. Eur., 



