1875.] 483 [Scudder. 



The median carina of the pronotum is also slightly less elevated in 

 specimens from New England than in individuals from the extreme 

 south. Guatemala specimens (probably from the elevated country) 

 resemble mostly the New England type ; specimens from the Mid- 

 dle States (Maryland, etc.), also accord best with the New Eng- 

 land form, although some of them show a tendency to vary toward 

 the Floridan peculiarities. Specimens from Illinois and Ohio again 

 agree in most points with New England individuals, while a specimen 

 from Missouri has most of the Texan characteristics, although the 

 upper distal half of the wing is somewhat infuscated. 



As compared then with New England types, specimens from the 

 south show a tendency toward lengthening of the antennae, softening 

 of the sculpturing of the head, elevation of the pronotal crest, and 

 intensity (with stronger contrasts) of coloration; toward the south- 

 west the coloration is more sharply defined; toward the southeast 

 more diffuse. These facts are entirely in accordance with the laws 

 laid down by Mr. Allen for the variation of birds, which, according 

 to him and other authors, show toward the south an enlargement of 

 peripheral parts and a greater intensity and extent of the dark colors. 



This species occurs from the White Mountains of N. Hampshire to 

 Key West, Florida, Texas and Guatemala, and northwestward, to 

 St. Louis, Mo., and Ogle Co., Illinois. 



2. T. brevipennis nov. sp. Resembling T. viridifasciata in 

 form, but wholly green or greenish yellow, with abbreviated teg- 

 mina, and wings and antennas like those of northern specimens of 

 T. viridifasciata. Sculpturing of the head similar to that of T. viri- 

 difasciata, but with a more sulcate fastigium of the vertex, and with 

 a slight though distinct median carina on the summit; the frontal 

 costa is narrowly sulcate throughout ; antennas not so long as the 

 head and thorax together. Prothorax and its dorsal carina as in T. 

 viridifasciata; tegmina shorter than the abdomen; wings still shorter, 

 pellucid, the veins of the upper half blackish, but with no trace of 

 any fuliginous clouds; hind tibiae more or less dusky, with a very in- 

 distinct paler band near the base. 



Length of body, 22 mm.; of antennae, 6 mm.; of tegmina, 12.25 mm.; 

 of wings 9.5 mm.; of hind femora, 12.75. 3 ?, California, Henry 

 Edwards, Esq. 



3. T. cubensis nov. sp. Body green (?), or griseo-cinereous 

 (c?,¥), in the latter case with the disc of the pronotum often marked 

 with a paler X -shaped spot. Tegmina griseo-cinereous, blotched 



