4 BULLETIN OF THE 



chance, because it would liavc less incliniition to attempt to leave the 

 drift wood or what-uot, which kept it above the waters, and thus the 

 exceptional proportion of subapterous forms may readily be explained. 



At the same time, there can be little reason to question that a few of 

 the species may be supposed to have reached the islands bj' llight. One 

 of them, the Sphingonotus, is strong-winged, and is said by Stal to occur 

 also in the island of Puna in the 13ay of Guayaquil ; this genus contains 

 species which are among the exceedingly few Orthoptera believed to be 

 common to the Old and New Worlds. Two others fall in the same 

 restricted genus, Schistocerca, to which belongs S. j^eregrina Oliv., a 

 S2)ecics which has with little doubt crossed the Atlantic from fSoutii 

 America to Africa, being found on both continents and being the only 

 species of this numerous genus which has been found outside of America. 

 Moreover, Walker — not the best authority, it is true — identifies speci- 

 mens in the British Museum from the west coast of South America with 

 S. menalocera from the Galapagos ; and I have in my collection a new 

 species of Schistocerca, the largest known to me,* which was taken at 

 sea two hundred miles off the west coast of South America, or nearly 

 half-way to the Galapagos. 



* 



* As this seems a fitting occasion, I append a description of tlie species, wiiich 

 will doubtless be found at home on tlie west coast of South America. 



Schistoctrca cxsul, s\). nov. A species of the largest size, larger than any other 

 that I have seen, alUed to 6'. anieiicana. Frontal costa of head very broad, nar- 

 rowed slightly at summit, wliere it scarcely equals the width of the vertex between 

 tiie eyes. Trozona of thorax compressed somewhat, but equally, the dorsum tec- 

 tilbrm and slightly carinate ; metazona very obtusely angulate behind. Anal area of 

 the tegmina narrow, slightly narrower tlian the costal. Prosternal spine erect, com- 

 pressed, the anterior face arcuate, the posterior straight, giving it a retrorse appear- 

 ance. Head pale cinereous, the lower half obscurely infuscate, the frontal costa 

 laterally infuscate above and tiie vertex marked irregularly with fuscous. Thorax 

 blackish fuscous on the subrugose prozona, the lateral lobes more or less embrowned 

 below, with an upper broad and lower slender pallid vitta ; metazona punctate, 

 fusco-castaneous, the dorsum anteriorly streaked iongtitudinally with fuscous. 

 Tegmina cinereous, sparsely and irregularly maculate with I'uscous on tlie basal half 

 in the vicinity of the principal veins, and on the ai)ical half marked with blackish 

 fuscous linear dashes upon the nervules, ranged m irregularly jiarallel oblicjuily 

 transverse series, diminishing in importance outwardly. Wings hyaline with black 

 veins becoming luteous toward tiie base in the anal area, giving this a slightly 

 flavescent tone ; a few subapical cells are infumated. Hind femora pallid cinereous, 

 above feebly trifasciate with obscure fuscous ; hind tibial spines yellow at base, red 

 uiesially, black apically. 



Length of body bG mm ; tegmina 77 mm.: liind femora o5 mm One female, 

 taken two hundred and fifty miles oil the west coast of South America. 



