NORTH OF MEXICO. 



267 



sparse and recumbent, except upon the presternum, where they are much longer and 

 erect. For the unique of this interesting species I am indebted to Capt. 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. 



TRIBE V — TIIINOBATINI. 



Body more or less elongate oval, with or without wings. Epistoma broadly rounded 

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

 coxee without trochantin, coxa? enclosed by sterna. Intcrcoxal process of abdomen acute. 

 Tarsi ciliate beneath. 



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

 Anterior tibiffi with outer angle prolonged. eurymetopon 



truncate at tip. emmenastus. 



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

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

 out wings. 



ETJRYMETOPON, Each. 

 Eurymetopon, Each., Zool. Atl. IV, p. 8. 



In this genus the apical angle of the anterior tibia; is prolonged and acute and the 



eyes have a well defined supra-orbital ridge. 



Our species are as follows : 



Margin of front continuous. Winged. 



Not winged. 



Margin of front with a slight notch on each side. 

 Anterior tibia; scarcely serrate, winged. 



rufip e s . 



con vex i co lie . 



bicol o r . 



p u n c t u 1 a t u m . 

 s o d a 1 i s . 



s e r r a t u in . 



Anterior tibia; distinctly serrate, winged. 



E. ruflpes, Each., Alias IV, j>. 8; pi. 18, fig. I; ubnorme, Lee. Ann. Lye. 5, 188. 



Not ran; under mesquit bark, Arizona. 



The synonymy is determined from a duplicate of Eschscholtz's type in [lie cabinet of 

 Dr. Lcconte, who described his species under the impression that rujipes was apterous. 

 Length .30-.35 inch. 



E. convexicollo, Leo. loo. cit. 



Very distinct by its much more robust form, shorter, and apterous. Is not rare under 

 stones everywhere in California. 

 Length .30 inch. 



