106 DESCRIPTIONS OF NEW SPECIES. 



367. Eu. serratum. Alatuin, elongato-ovale, pallide rufo-piceum 

 nitidum, capite tboraceque subscabro-punctatis, hoc lateribus rotnndatis 

 serrulatis ; elytris fere seriatim subscabro-punctatis, tibiis anticis inodice 

 dilatatis serratis, margine externo sinuato, angulo apicali producto 

 acuto. Long. '12. 



One specimen, collected in Arizona, by Dr. B. J. D. Irwin, 

 U. S. A. Body proportioned as in Eu. convexicolle, but smaller 

 and very distinct by the characters given above. The mentum 

 is very distinctly emarginate in front, the emargination being 

 filled by the ligula, which becomes quite prominent. This species 

 thus seems to indicate a different group in the genus. In every 

 other respect it agrees with typical Eurymetopon, except that the 

 epistoma is broadly truncate at the middle, and very slightly 

 sinuate each side, instead of being slightly emarginate in front, 

 and rounded each side.* 



EMMEIASTUS Motsch. (emend. Lec.f). 



36S. E. pimctatlis. Apterus, elongato-ovalis, piceus nitidus, capite 

 dense, tborace fortius punctatis, hoc latitudine plus sesqui breviore, 

 niodice convexo, antrorsum angustato, lateribus modice rotundatis, basi 

 late bisinuata, angulis posticis fere rectis ; elytris striis indistinctis punc- 

 tatis, postice parum impressis, interstitiis parce punctatis ; ore, antennis, 

 corporeque subtus piceo-ferrugineis. Long. -30 — '37. 



Cape San Lucas, Lower California. Larger and broader than 



* Lacordaire, Gen. Col. V, 66, states that the head of Eurymetopon is not 

 carinate above the eyes. There are no supraorbital ridges as in Triorophus, 

 separated from the eye, but there is the small acute fold in front of the 

 eye, which disappears at its upper margin; the same fold is observed in 

 Triphalus, Trimytis, and Emmenastus, but is wanting in Epitragus and 

 Schoznicus. 



\ I have applied this generic name to several species, which, while being 

 closely related to Eurymetopon, differ in the characters pointed out by 

 Lacordaire, Gen. V, 66 ; viz. : a shorter mesosternum, epistoma rounded 

 in front, and especially the anterior tibiae truncate at tip, not dilated, with 

 the outer angle not prolonged. The mentum is somewhat emarginate in 

 front, and the ligula rarely visible. Mannerheim, (Bull. Mosc. 1853, 112,) 

 states that E. rugosus Motsch., the type of the genus, is only a specimen 

 of Blapstinus pulverulenfns ; but whatever may be the label, this view is 

 not consistent with the generic description of Motschulsky, upon which I 

 have based the reference of the species above described. It seems to me 

 proper, therefore, while rejecting E. rugosus Motsch. as a doubtful, or im- 

 perfectly described species, to retain the generic name for the species to 

 which it will apply. 



