1869.] 355 [BurgesB. 



pressed, well rounded, the portion posterior to thera sharply serrulate. 

 Wings pea green, with roseate veins on the posterior half, and per- 

 haps slightly washed with roseate in this same portion. Outer side 

 of th<! hind femora ornamented with a row of (apparently) (padrate 

 whitish spots ; spines on the upper half of the hind tibise tipped very 

 slightly with black; those on the lower portion more distinctly. 



Expanse of tegmina, ? 194 "™". 



Guayaquil. Prof. Orton. 



"We can give but slight credence to the statements of the earlier 

 authors concerning the home of the insects which they describe ; and 

 the same uncertainty and confusion of habitat, on a lesser scale, 

 seems to have clung to these up to the present time. The sjiecles of 

 the genus Tropidacris were indiscriminately located over the whole 

 of northern South America, Avhereas it appears, by the sifting of evi- 

 dence, that, with the exception of one (T". cristata)^ which Is some- 

 what unique In its characters, and extends over the whole Brazilian 

 coast, and to a certain degree Into the interior, they are each charac- 

 teristic of a separate zoological province, 7'. Fahvicii being found on 

 the Brazilian coast from Rio to Para, T. Latrelllei In the interior, T. 

 dux upon the isthmus of Panama and the surrounding region, and T, 

 rex on the west coast. With the exception of the Interior of Brazil, 

 each of these provinces also harbors one species of Lophacris, viz.: 

 L. Olferdi on the Brazilian coast, L. Velasquezii in Mexico, and L. 

 Humholdt'd in Ecuador. The genus Titanacris does not seem to fol- 

 low the same rule ; the special habitat of T. carinata has never been 

 given, Avhile that of T'. albipes is on the Brazilian coast, specimens 

 having been quoted from Rio, Lago Alexo, Para and Surinam. 



I am indebted to the Museum of Comparative Zoology, the Pea- 

 body Academy of Science and this Society, for most of the material 

 used in this study. 



Mr. Edward Burgess stated that while collecting insects at 

 Key West, Fla., at about noon of Jan. 31st, he found a 9 

 larva of Anisomorpha huprestoides (StolF) Gray, under a 

 small piece of coral, and shortly afterwards, in a similar situ- 

 ation a $ and 9 in coitu. On Feb. 3d, a friend found a 

 large number of these insects under a log; and on the after- 

 noon of the 5th, after a rainy morning, he discovered under 

 a log another large family, about twenty in number, of all 



