WEEVILS OF GENUS TACHYGONUS — MONTE 215 



beyond the middle with a series of setae in two transverse rows, 

 forming a faint band from the sixth to tenth interstices. 



Posterior femora dark, thicker apically than basally, granulose, 

 covered with black and white setae, the latter most numerous on the 

 basal half ; armed with numerous scattered minute teeth and with three 

 long, black teeth, the second slightly the longest, first and third sub- 

 equal, the most distal of the three teeth placed on the interior edge, 

 the other two on the exterior edge. Posterior tibiae rather broad, 

 arcuate, provided with strong, erect setae on the external border, and 

 long adpressed ones within. Tarsi ferruginous and covered with long 

 white hairs. 



Length 2.17 mm.; width 1.73 mm. 



Type.—V.S.l^M. No. 58186. 



One specimen, Teffe, Amazonas, Brazil, December 10, 1919. Col- 

 lection Bovie through Buchanan. 



This species is most closely allied to T. guerini Monte but is smaller ; 

 elytra with the interstices lower, the pits deeper, and with the pectinate 

 white scales on the external margin extending across the middle ; the 

 posterior femora with fewer teeth. It is smaller than T. hydropicus 

 Chevrolat, a species which has the teeth on the posterior femora dif- 

 ferently placed. The species is named in honor of L. L. Buchanan, 

 who has taken great interest in weevils. 



TACHYGONUS BICOLOR, new species 

 Figure 22 



Black, shiny. Legs yellowish. Rostrum smooth, dark at base with 

 the sides pitted, the tip ferruginous. Antennae yellowish white. 

 Prothorax and elytra densely covered by testaceous and whitish hairs. 

 Prothorax with shallow pits; the sides of the prothorax and of the 

 meso- and metathorax densely covered with white pectinate scales. 



Elytra very broad, lightly pitted, apical third of the suture with 

 some crossed, erect, yellow setae ; a scutellar patch on each elytron with 

 pectinate white scales; the pectoral channel and the last (third and 

 fourth visible) abdominal segments covered densely with white scales, 

 the genital (fifth) segment with long white hairs instead of scales. 



Posterior femora very elongate, covered with long, black and white 

 hairs, armed with three long, strong teeth, two of which are opposite 

 each other, forming a pair at apical two-sevenths, the other principal 

 tooth submedian, the latter placed between two very short teeth. 

 Posterior tibiae swollen, arcuate, yellowish, but with the external 

 border reddish. 



Length 2.17 mm.; width 1.56 mm. 



Type.— U.S.N.M. No. 58187. 



