4 PROCEEDINGS OF THE NATIONAL, MUSEUM vol.66 



terrupted at the middle, the apex not as deeply emarginate, and 

 with an obsolete tooth at the middle of the emargination. 



Length, 11.5-14 mm. ; width, 4.75-5.5 mm. 



Tyfe locality. — Rurrenabaque (Beni River), Bolivia. 



Other localities. — Rosario (Lake Rogagua), Bolivia. 



Type, allotype and paratypes. — Cat. No. 26964, U.S.N.M. 



Described from six specimens, four males and two females. The 

 type and allotype collected at the type locality during November, 

 1921; and four paratypes, 3 males and one female, collected at 

 Rosario, during the same month. 



CHRYSOBOTHRIS FRONTALIS (Olivier) 



Buprestis frontalis Oliviek, Entom., vol. 2, 1790, gen. 32, pp. 45-46, pi. 5, fig. 44. 



One specimen collected at Cavinas (Beni River), during Feb- 

 ruary, 1922. 



CHRYSOBOTHRIS RUBIMACULATA (Castelnau and Gory) 



Coloiogaster rubimaculata Castelnau and Gory, Hon. Bupr., vol. 2, 1836, pp. 

 10-11, pi. 2, fig. 9. 



Represented by five specimens collected at Rosario (Lake Roga- 

 gua), during November, 1921. 



CHRYSOBOTHRIS BENIENSIS, new species 



Female. — Form rather broadly oblong and feebly convex, and with 

 the surface moderately shining ; above piceous, with a strong bluish, 

 greenish, or purplish tinge, the head with the lateral margins, front 

 of epistoma, and antennal cavities narrowly margined with a bright 

 green or cupreous color; antennae bright green on basal joints, be- 

 coming more aeneous toward the apex ; each elytron with three round 

 deeply depressed foveae, which are golden-green margined with 

 cupreous, one in the basal depression, one on the disk at middle, and 

 the other at the apical third and situated closer to the lateral margin 

 than the suture ; color beneath similar to above, except on the median 

 parts, where it is bright green or cupreous ; tarsi cyaneous. 



Head moderately convex, with the front triangular, the sides 

 strongly obliquely narrowed toward the top, with an obsolete arcuate 

 carina between the vertex and occiput, a broad obsolete depression on 

 the front, and a distinct narrow longitudinal carina on the occiput ; 

 surface coarsely and densely punctate, the punctures becoming trans- 

 versely rugose on the front, and sparsely clothed with long semi-erect 

 cinereous hairs; intervals smooth; eyes large, feebly convex, more 

 acutely rounded at bottom than on top, and separated from each 

 other on the occiput by four-fifths of the distance between the an- 

 tennal cavities; epistoma broadly, angularly, and rather deeply 

 emarginate in front, the lobes on each side broadly rounded ; antennae 



