284 OETHOPTEEA. 



Two males and one female from Demerara are before me. The Costa Rican 

 specimen, a female, in the present writer's collection, is a little more slender than the 

 example of the same sex coming from the Guiana locality, but does not appear to be 

 greatly different otherwise. 



[CALETES, Redtenbacher. 

 Caletes, Redt. Proc. Zool. Soc. Lond. 1892, pp. 209, 210 ; Giglio-Tos, Boll. Mus. Zool. Anat. Comp. 

 Torino, xiii. no. 311, p. 47 (1898). 

 Caletes is somewhat closely related to Vilerna, Stal, and as the genus may be found 

 to extend to Panama it is necessary to notice it here. 



l. Caletes apterus, Redt. 



Caletes apterus, Redt. Proc. Zool. Soc. Lond. 1892, p. 210, t. 16. figg. 11 «, b 1 ; Brunner, ib. 1893, 

 p. 606 2 . 

 Hob. West Indies, St. Vincent l , Grenada 2 (Broadway).'] 



CLEMATODES, Scudder. 

 Clematodes, Scudd. Journ. N. York Ent. Soc. viii. p. 213 (1900). 



This is another genus allied to Vilerna. It occurs in Northern Mexico and the 

 South-western United States, where the only representative, as far as known, lives 

 upon a species of Larrea that grows profusely over much of that arid region. 



1. Clematodes larrese, Scudder. (Tab. IV. figg. 1, 6 ; 2, $ .) 

 Clematodes larrece, Scudd. Journ. N. York Ent. Soc. viii. pp. 213, 214 (1900) \ 



Hab. North America, New Mexico 1 . — Mexico, Villa Lerdo in Durango, Comancho 

 in Zacatecas (L. Bruner). 



In some of its characteristics this insect reminds one of the different members of 

 the Pyrgomorphid-genus Calamacris (Atyphoscirtus), which occurs in similarly dry 

 places. It also bears a strong resemblance to the African and Madagascar genus 

 Geloius, several species of which are known from the arid regions of those countries. 



VILERNA, Stal. 

 Acridium in part. 



Vilerna, Stal, Recens. Orthopt. i. pp. 38, 71 (1873) ; Giglio-Tos, Boll. Mus. Zool. Anat. Comp. 

 Torino, xiii. no. 311, p. 47 (1898). 



The genus Vilerna includes a number of medium-sized, more or less rugose, brownish 

 locusts that inhabit Tropical- American countries from Central Mexico to Northern 

 Argentina. Some of the so-called species merge into one another to such an extent 

 as to render their separation somewhat difficult and uncertain. Two or three of them 

 belong to our region. 



