222 PROCEEDINGS OF THE NATIONAL MUSEUM vol. 09 



at about apical third, one median, and one behind middle, the last 

 the smallest. Hind tibiae darkish brown covered with white and 

 dark hairs. Hind tarsi yellowish and densely covered with long white 

 hairs. 



Length 2.21 mm. ; width 1.48 mm. 



Type.—{].S.^M. No. 58193. 



One specimen, Hamburg Farm, Reventazon, Ebene Limon, Costa 

 Rica, F. Nevermann, collector, on a shrub, August 10, 1924. 



This species is chiefly distinguished by the disposition of the teeth 

 on the posterior femora and by the dark spots on the elytra. 



TACHYGONUS VALIDUS. new species 



Figure 29 



Black, the elytra slightly brown at the shoulders. Prothorax pitted 

 dorsally, the pits larger at sides than medially. The whole body bear- 

 ing long dark-brown hairs. The sides (flanks) of the pro-, meso-, 

 and metathorax with -white pectinate scales. Elytra wide, the pitting 

 rough, shoulders salient, a few white pectinate scales in the post- 

 scutellar region forming a vaguely defined patch, suture from this 

 patch to apex with a series of brown, crossed setae. 



Anterior and intermediate legs yellowish; posterior legs with 

 femora dark medially, reddish at the apex and base, the basal reddish 

 part with abundant white hairs which are more numerous on the 

 external surface. Hind femora granulose, the dark median part with 

 four stout teeth on the internal edge (two larger and two smaller) 

 and also with two on the external edge, of which the antemedian tooth 

 is opposite one of the large teeth on internal side and forms a pair 

 with it, the second of the external teeth quite distant from the others 

 and placed slightly beyond basal third of femur. Hind tibiae curved 

 and widening toward the apex, which is ferruginous and bears a few 

 white pectinate scales; remainder of tibia dark and covered with 

 abundant dark hairs ; hind tarsi ferruginous and covered with white 

 hairs. 



Length 2.82 mm. ; width 2.08 mm. 



Type.—U.S.l^M. No. 58194. 



One specimen taken by Dr. R. E. Blackwelder, at Ciricito, Panama 

 (Canal Zone), March 3, 1930. 



Similar to T. quinquedentatus Champion but differentiated by the 

 femoral teeth, by the widening of the hind tibiae, and by the indistinct 

 postscutellar patch, which is formed by about six pectinate scales on 

 each side of the suture. Near to T. hondari Marshall, but smaller, 

 with narrower tibiae, the femora with four teeth on the inside (two 

 larger and two smaller) and small tubercles, and with two teeth widely 

 separated from each other on the external side. 



