224 PROCEEDINGS OF THE NATIONAL MUSEUM vol. 99 



Hind tibiae dark and curved, the internal surface slightly serrated 

 and covered with white hairs. Hind tarsi dark brown, the last seg- 

 ment yellowish, all segments covered densely with white hairs. 



Length 2.00 mm. ; width 1.52 mm. 



7\/pe.~U.S.^M. No. 58195. 



One specimen, Porto Bello, Panama (Canal Zone), collected by A. 

 Busck, February 20, 1911. 



Close to T. curvicrus Champion but with more teeth on the femora 

 and with much thickened femora (thicker than the tibiae). 



TACHYGONUS SEMIRUFUS Champion 



Six specimens, Paraiso, Panama (Canal Zone), collected by E. A. 

 Schwarz, January 26, March 16, April 17, and May 10, 1911. 



Sometimes the color is red brown, in this case the posterior femora 

 and tibiae are dark, but lighter on the apex of the former and on the 

 base of the latter. 



TACHYGONUS GOWDEYI Marshall 



Eight specimens, El Salvador, on madre de cacao, A. K. Salman, 

 collector, March 20, 1925. 



TACHYGONUS NITIDUS. new species 



Figure 31 



Shining black ; front and middle legs, basal two-thirds of the hind 

 femora, and entire hind tarsi ferruginous. 



Kostrum with basal half darker and with whitish hairs near the 

 eyes. Head with delicate pitting. 



Prothorax with wide but shallow pitting, upper surface with brown, 

 erect hairs, the flanks with fine, white, pectinate scales, which are also 

 present on the flanks of meso- and metathorax, the scales on meta- 

 thorax more abundant on metepisternum than on sides of 

 metasternum. 



Elytra with deep pitting, each pit being the origin of a fine light- 

 brown hair, the interstices with longer ones of the same color. Post- 

 scutellar patch wanting. 



Posterior femora with the basal two-thirds ferruginous, the remain- 

 der black. White hairs are present on the basal part and black ones on 

 the apical. The femora are armed with five teeth on the internal side, 

 the one nearest apex very short, the second longer, the remainder 

 gradually diminishing in length. Hind tibiae black, slightly serrated 

 inwardly, with hairs subappressed, the external margin with a few 

 erect setae. Hind tarsi brown, with short, dark hairs. 



Length 1.56 mm. ; width 1.21 mm. 



