1916.] NATURAL SCIENCES OF PHILADELPHIA. 1G9 



Length of 

 Length of Length of Length of caudal 



9 body. pronotum. tegmen. femur. 



Key WVm, Fla., Type 24.5 4.7 18. 13.9 



Key West, Fla., Paratype 24.3 4.5 16.9 12.9 



Key West, Fla., Paratype 21.5 4.5 17. 13. 



K«v West, Fla., Paratvpe 25.6 4.8 20. L4.2 



Corpus Christi, Tex 23.3 4.3 19.2 14.1 



Corpus Christi, Tex 26.3 5.1 20.7 15.5 



Corpus Christi, Tex 26. 4.8 20. 15.2 



It will be seen from the above measurements that the Texan 

 material has slightly longer femora in both sexes, but the difference 

 is extremely slight. The fastigium varies considerably in the degree 

 of angulation, particularly in the male sex, occasionally being dis- 

 tinctly acute-angulate in that sex, while in the female it sometimes 

 is faintly obtuse-angulate. The lateral carinse of the pronotum vary 

 much as they do in 0. olivacea, being more inbowed in some specimens 

 than in others, in fact almost subparallel cephalad in occasional 

 individuals, while very frequently in the males and less frequently 

 in the females they are distinctly subobsolete between the first and 

 second transverse sulcus. The individual variation in tegminal 

 length is less than usual in the present genus. 



We have before us a series of seventy-one specimens of this inter- 

 esting species. The localities represented and data on the material 

 are as follows : 



Punta Gorda, Florida, XI, 16, 1911, Key West, Fla., I, 20, 1904, (H.); 



(W. T. Davis), 1 9 . Ill, 15-16, 1910, (H.); VII, 3-7, 



Marco, Fla., IV, 17 and 20, 1912, 1912, (R. & H.), 12 c?\ 22 9, type, 



(W. T. Davis), 1 cf, 3 9 . allotype and paratvpes. 



Key Vaca, Fla., Ill, 14, 1910, (H.), Corpus Christi, Texas, VII, 29, 1912, 



1 o". (H.), 9 <?, 12 9, 1 juv. 9. 



Boot Key, Fla., Ill, 14, 1910, (H.), Point Isabel, Tex., VIII, 2, 1912, 



1 d\ 19. (H.), 3 o". 



Big Pine Key, Fla., VII, 6, 1912, Tampico, Tamaulipas, Mexico, XII, 



(R. & H.), 1 o". 1906, 1 o", 2 9, [Hebard Cln.]. 



The above localities show that the range of this species is dis- 

 continuous, the two regions in which it occurs being separated by an 

 area, i.e., the greater portion of the Gulf coast of the United States, 

 where O. olivacea replaces it in the same environment. We can 

 only speculate as to the centre in which the species originated, but 

 in view of the accumulating evidence bearing on the Mexican origin 

 of certain south Florida Orthoptera it is not at all impossible that 

 this species in the past reached the eastern portion of its present 

 distribution from Mexico, and possibly by way of Yucatan. 



It is evident from the data in hand that the species occurs through- 

 out the entire year, material being before us taken every month in 

 the year except February, May, June, September and October. 



