120 Annals of the Carnegie Museum. 



equator. As now restricted only a single species of the genus, and it 

 not quite typical, is found in South American territory. 



Tetrix gracilis (Bruner). 



Tetlix gracilis Bruner, Journ. N. Y. Ent. Soc, XIV, 1906, 145. 



Habitat. — Island of Trinidad, West Indies. It very likely inhabits the 

 mainland of South America in British Guiana as well. 



This species seems to have been overlooked by Dr. J. L. Hancock in 

 his write-up of the family for Genera Insectorum. He previously ex- 

 amined the type specimen and agreed that it was a member of the genus 

 Tetrix, though not quite typical. 



Genus Stenodorus Hancock. 



Stenodorns Hancock, Ent. News, XVII, 1906, 90; Genera Insectorum, fasc. 48, 

 1906, 59-60. 



Only a single species of the genus is known. 



Stenodorus extenuatus Hancock. 



Stenodorus extenuatus Hancock, Ent. News, XVII, 1906,91; Genera Insectorum. 

 fasc. 48, 1906, 60, pi. 4, fig. 39. 



Habitat. — Peru, South America. 



Genus Mic^onotus Hancock. 



Micronolus Hancock, Tettig. N. Am., 1902, 97; Genera Insectorum, fasc. 48, 

 1906, 63. 



This is a South American genus composed of several species. It is 

 rather closely related to Tetrix, from which it difTers as indicated in the 

 synoptic table of subfamilies and genera on preceding pages of this paper. 

 The subjoined table will assist in the recognition of the species: 



Synopsis of the Species of Micronotus. 

 A. Pronotum somewhat abbreviated posteriorly, the apex not passing the tips of 

 the hind femora. 

 h. Median carina of the pronotum very prominent and quadriundulate, surface 



rugoso-granulate quadriundulata Redtenbacher. 



bb. Median carina of the pronotum less prominent and inconspicuously triun- 



dulate, the surface simply granulate hancocki sp. nov. 



A A. Pronotum elongated, its apex extending beyond the tips of the hind femora. 



b. Form moderately robust, the carinse of the anterior femora strongly compresso- 



undulate; apex of the hind edge of the pronotum not greatly lengthened 



beyond the tips of hind femora; the third joint of the hind tarsi longer 



than the first and second combined asperulus Bolivar. 



