168 BULLETIN 14 5, UNITED STATES NATIONAL MUSEUM 



on anterior and middle tibiae not so distinct, and the claws similar on 

 all feet, cleft near the middle, the outer tooth long and acute at apex, 

 the inner one short and broad. 



Length, 8.2-14.5 mm. ; width, 2-3.75 mm. 



Type localities. — Of cavatus, Mexico ; present location of type un- 

 known to writer. Of texanus, Texas; cotypes in the Academy of 

 Natural Sciences of Philadelphia, and the Museum of Comparative 

 Zoology at Cambridge, Mass. 



DISTRIBUTION 



Recorded from the following localities: 



Mexico: Northern Sonora (Morrison). Cerro de Plumas; Almolonga ; Acapulco 

 in Guerrero (Hoge). Cordova; Vera Cruz (Salle, Hoge). Jalapa (Hoge). 



Arizona: Pinal Mountains ( ). Nogales August 31 (C. Schaeffer). "Ari- 

 zona " ( Morrison ) . 



Texas: New Braunfels ( ). Flotonia, July 30 (H. Wenzel). Fedor; 



Bethage, May 7 ( ). "Texas" (Belfrage). 



Variations. — This species is extremely variable in size, and the 

 color varies from a golden or bronzy green to reddish cupreous. In 

 carefully collected specimens the elytral vitta extends from the 

 humerus to apical third, forming at its end a denser spot, on each side 

 there is a short pubescent vitta opposite the end of the former, and 

 a short distance in front of the apex is a small pubescent spot. This 

 vitta is easily lost by abrasion, and in many of the examples ex- 

 amined, only the basal spot, apical end of the vitta, and the ante- 

 apical spot are distinct. In most cases the prehumeral carina is 

 replaced by a slight elevation, but occasionally a specimen is found 

 in which the carina is obsoletely indicated. 



Host. — Unknown. 



This species is rare in collections and nearly all of the examples 

 examined are labeled simply, " Texas, Belfrage," or " Arizona, Mor- 

 rison." Chamberlin (1926) records it from Florida, but this is an 

 error and probably refers to concinnus Horn, a closely allied species. 

 The sexes are very similar, and the characters given by Horn (1891) 

 for separating them are of little value. The tarsal claws are not alike 

 in the two sexes, and both sexes have the anterior and middle tibiae 

 armed Avith a small tooth, only the tooth being shorter and less 

 conspicuous in the female, and the other characters given are more 

 or less variable. 



53. AGRILUS AUREUS Chevrolat 



Figure 37 



Agrilus aureus Chevrclat, Silbermann's Revue Bntomol., vol. 5, 1838, 

 pp. 98-99. — Waterhottse, Biol. Centr.-Amer., Coleopt, vol. 3, pt. 1, 1889, 

 p. 103. — Ditges, La Naturaleza, ser. 2, 1891, p. 29, pi. 2, fig. 45.— Cham- 

 berlin, Cat. Buprestidae, 1926, p. 53. 



