368 Annals of the Carnegie Museum. 



specimens coming from the Island of Trinidad are in the writer's 

 collection, and were taken by H. D. Chipman. Saussure based the 

 species on specimens coming from various points in warmer Mexico, 

 and separated others from Peru as a variety which he called peruviana. 

 I myself have taken it both in Mexico and Costa Rica. 



Should all of these specimens belong to a single species, and they 

 certainly seem to me to do so, as I have hastily compared them, this 

 would give quite a wide range for it. 



Family NEMOBIID^. 



This family has a world-wide distribution, and contains a large 

 number of small to medium-sized insects. 



Synopsis of the South American Genera of Nemobiid.-e. 



A. Posterior metatarsus not sulcate nor serrate. Anterior tibiae provided with 

 an auditory opening on their outer side. Median vein of the tegmina 

 undivided. 

 h. Male tegmina furnished with a tympanum. Front sHghtly convex, but not 

 rostrate. Hind tibiae provided on each side beyond the middle with four 

 long movable pubescent spines and their apex with six distal spurs. 



Nemohius Serville. 

 bb. Male tegmina without a tympanum. Front somewhat tuberculate be- 

 tween the bases of the antennae. Hind tibiae provided on each side with 

 only three movable pubescent spines and the apex with five spurs, three 



external and two internal Hygronemobius Hebard. 



A A. Posterior metatarsus slightly depressed, gently sulcate and serrate on the 

 outer margin. Front tibiae with the auditory opening on the inner face. 

 Median vein of the tegmina branched Hemigryllus Saussure. 



Genus Nemobius Serville. 



Nemobius Serville, Ins. Orth. (1839), p. 345; Fischer, Orth. Eur. (1853), p. 183; 

 Saussure, Miss. Mex., Orth. (1872), p. 380; Mem. Soc. XXV (1877), p. 68; 

 Biol. Cent. Amer., Orth., I (1897), p. 221, and many others. 



There are several other generic names which have been given to 

 members of the genus, but these need not be mentioned fere. (See 

 Kirby, S>n. Cat. Orth., II, p. 14.) 



Representati\ e of the genus Nemobius are very widely scattered 

 over the surface of the earth. In fact they occur on most of the 

 continents and many of the islands within the temperate and tropical 

 zones. The species are most numerous in tropical regions. Many of 

 the species possess both long- and short-winged forms, and some also 



