NORTH OF MEXII 0. 261 



sparse and recumbent, excepl upon the prosternum, where the] are much longer and 

 erect. For the unique of this interesting species I am indebted to ('apt. John E. Hill of 

 the California Volunteers, to whose industry, exercised under the excessive heat of the 

 Summer at Fort Yuma, I owe many fine species. 



I RIBE V — THINOBATINI. 



Bodj inure or less elongate oval, with or without wings. Epistoma broadly rounded 

 without prominent middle lobe. Mentum Large, concealing the parts above. Middle 

 coxae without trochantin, coxae enclosed by sterna. IntercoxaJ process of abdomen acute. 

 Tarsi ciliate beneath. 



A- here recognised but two genera constitute the tribe, as follows: 

 Anterior tibiae with outer angle prolonged. eurymetopon. 



"• truncate at tip. EMMENAST1 S. 



The character made use of by Lacordaire for defining the groups of genera of the tribe 

 appears to he of no value whatever, species occuring in both our genera with and with- 

 out wiugs. 



EURYMETOPON, Esch. 

 Eurymetopon, Esch., Zool. Ail. IV. p. s . 

 In this genus the apical angle of the anterior tibiae is prolonged and acute, and the 



eyes have a well defined supra-orbital ridge. 



Our specio are as follows : 

 Margin of front continuous. Winged. r u fi pes. 



Not winged. co nvexicolle. 



bi color . 

 Mar-in of front with a slight notch on each side. 



Anterior tibiae scarcely serrate, winged. punctulatum. 



s o d a 1 is. 

 Anterior tibiae distinctly serrate, winged. ser ra tu m . 



I rufipes, Escb., Atlas IV, p. 8; pi. is. fig. 1; abnoi Lee. tan. Lye. 5, 



Not rare under mesquil hark. Arizona. 



The synonymy is determined from a duplicate of Eschscholtz's type in the cabinet ol 

 Dr. Leconte, who described his species under the impression that nifipes was apterous. 

 Length .30-.35 inch. 



1 .. conv exicolle, Lee. loc. « ■ i t . 



Very distinct bj its much more robust form. shorter,and apterous. N not rare under 

 stones everywhere in California. 

 I length .30 inch. 



