4 PROCEEDINGS OF THE NATIONAL MUSEUM vol. 77 



Female. — Differs from the male in having the eyes separated from 

 each other on the front by about twice the width of the labrum, 

 and the antennae slightly shorter. 



Length, 12-16 mm. ; width, 2.6-3.6 mm. 



Tyfe locality. — Rio Frio, near Santa Marta, Colombia. 



Type.^ allotype, and paratypes. — Cat. No. 42820, U. S. N. M. 



Paratypes. — Darlington collection. 



Described from 48 examples (one type), all of which were reared 

 during 1928 by P. J. Darlington, jr., from the dead wood of 

 Triplaris species. Darlington was unable to get the specific name 

 of this tree, but he writes that it is the only narrow-leaved species 

 of this genus found commonly along the banks of brooks in the 

 foothills. In a large series of specimens of this species examined, 

 very little variation was observed except in size. There is a slight 

 variation in the shape of the pronotum; in some examples it is 

 slightly wider than long, whereas in others it is slightly longer than 

 wide. The reddish brown markings on the pronotum are also 

 somewhat variable; in some examples the arcuate vittae are dis- 

 tinctly separated in the middle, and in others they are connected 

 anteriorly to the oblique lateral spot. 



This species is allied to tridentifera Gounelle described from 

 Argentine Republic, but differs from that species in having the head 

 entirely yellow in front, the antennae uniformly reddish brown, 

 pronotum ornamented with three longitudinal reddish brown vittae, 

 which are more or less interrupted at the middle, but not connected 

 to each other at the base, scutellum yellow and nearly glabrous, and 

 in having the tips of the elytra obliquely truncate, with the exterior 

 angles acute. 



ODONTOCERA BUSCKI, new species 



Male. — Form similar to fa^sciata Olivier. Head yellow, with a 

 black spot on occiput between upper lobes of eyes ; antennae reddish 

 brown, with the dorsal surface of first and second joints black; 

 pronotum yellow, with the anterior margin and base broadly mar- 

 gined with black, the black margin on base becoming narrower at 

 the sides, and the disk ornamented with black markings as follows : 

 A transverse sinuate fascia at middle extending nearly to coxal 

 cavities, a longitudinal median vitta extending from anterior margin 

 to base, and wider behind the transverse fascia; scutellum black; 

 elytra pale yellow, vitreous, with the lateral and sutural margins 

 narrowly brownish red posteriorly, becoming blackish toward the 

 base, and with an elongate arcuate black fascia behind the base of 

 each extending from the lateral margin at basal fourth to the sutural 

 margin a short distance behind the scutellum; body beneath yellow, 

 with the apical segments of the abdomen dark brown, and orna- 



