from the Rio Nautla, State of Vera Cruz. 17 



from its great preponderance of tropical forms, to be classed 

 "with the Neotropical region proper. The student is referred, 

 for further information on the Tamaulipan fauna and the 

 biogeography of the Mexican region, to a paper published by 

 the writer in the ' Transactions of the Texas Academy of 

 Science,' vol. i. pp. 71-D6. 



The fauna bears some resemblance to that of the Lower 

 Eio Grande region ; but the Diptera do not show the 

 resemblance so much as do the Coleoptera and Hemiptera. 

 A considerable number of familiar forms among the more 

 striking species of the two orders last named were collected, 

 which I recognized as having previously taken in the 

 palmetto hammocks near Brownsville, Texas. But these 

 largely represent the tropical or subtropical element of these 

 faunas in the Lower Eio Grande region. 



On the whole the Lower Rio Nautla fauna is decidedly 

 tropical in its aspects, especially as regards the Diptera. 



The Cordia above mentioned was noticed growing, and in 

 flower, July 20 and 21, in places on the road that leads from 

 San Eafael (or Jicaltepec) to Perote, as far up as a point 

 about halfway, or more, between Tlapacoyan and Jalacingo. 

 It was particularly noticed above Tlapacoyan, and up to an 

 altitude, I should say, of -4000 feet or over. In the lowlands 

 it did not seem to me to be so abundant as above Tlapacoyan, 

 but rather of occasional occurrence. It is well to note that 

 t was an extremely good fly-plant. 



It may be added that vanilla, coffee, rubber, &c. do well 

 on the Lower Eio Nautla. It is an especially good vanilla 

 country from there north to the Papantla district. 



CliirouoiuidaB. 

 1. (EcactafurenSj Poey. 



Numerous specimens, Nautla, March 5. 



This species ranges up and down the Mexican Gulf coast 

 from TamauHpas to the Isthmus of Tehuantepec, and ex- 

 tends some short distance inland. I have already recorded 

 it from both the north and the south coasts of Jamaica 

 (Journ. Inst. Jamaica, i. p. 381), which was the first record 

 of its occurrence outside of Cuba, where it was originally 

 discovered and described by Poey. I have observed it on 

 car windows in the State of TamauHpas, near Victoria, in 

 October, it having perhaps been brought thus from Tampico; 

 and I have also noticed it at the mouth of the Coatzacoalcos 

 river. 



Dry pinned specimens show the wings to be strongly iri- 

 descent in certain lights, the dark and the white spots alike, 



Ann. <fe ALag. N. Hist. Ser. 6. Vol. xix. 2 



