152 RHYNCHOPHORA. 
c’. Alternate elytral interstices raised; anterior and intermediate 
femora black at the base ; posterior femora 4-dentate . . . fasciculosus, Boh. 
d®, Alternate elytral interstices not raised ; anterior and intermediate 
femora almost wholly reddish ; posterior femora 6-dentate. . difasciculatus, sp. n. 
6. Posterior tibie sinuate; prothorax without tufts. 
c', Elytra rounded-subquadrate, with a yellowish post-scutellar patch and 
a broad transverse fascia of scattered pectinate white scales ; posterior 
femora comparatively short, unidentate. . . . . - + 2 + + pectinisquamis, sp. 0. 
ad. Elytra subcordate. 
e. Elytra with two dense white post-scutellar tufts and scattered 
pectinate scales ; posterior femora bidentate, black to the apex . rhombus, Casey. 
f°. Elytra with, at most, two small white post-scutellar tufts and 
numerous pectinate scales ; posterior femora bidentate, ferruginous 
at the apex . . . . . 7/572) ) re 
g°. Elytra with asmall white seutellar spot, the pectinate scales wanting 
on the rest of their surface ; posterior femora with one long tooth. sinuaticrus, sp. n. 
h®. Elytra without scutellar spot, the pectinate scales wanting. 
e*. Elytra black ; posterior femora bidentate. 
ce‘. Posterior tibial claw strongly developed ; femoral teeth sub- 
contiguous ; setz of the upper surface coarse . . . flohri, sp. n. 
d‘. Posterior tibial claw feebly developed ; femoral teeth distant ; 
setee of the upper surface fine. . . . . . . . . « Oidentatus, sp. n. 
f°’. Elytra piceous or ferruginous, clothed with fine yellowish setee ; 
posterior femora with one or twoteeth . . . . . . . « flavisetis, sp. n. 
1. Tachygonus laticrus, sp.n. (Tab. VIII. figg. 12, 12 a.) 
Rhomboidal, moderately broad, shining, black, the tip of the rostrum ferruginous, the antenne, the anterior 
and intermediate legs, and the apical joint of the posterior tarsi, testaceous; sparsely clothed with very 
fine, erect, blackish sete, the sides of the prothorax and of the meso- and metasternum, and a scutellar 
patch on the elytra, thickly set with pectinate white scales ; the posterior femora and tibie thickly nigro- 
setose, the vestiture of the rest of the legs white. Prothorax closely, coarsely punctate, except along the 
narrow smooth median space. Elytra broad, transversely cordate; seriato-foveolate, the interstices 
narrow, somewhat raised, and asperate. Posterior femora very elongate, armed with four long teeth— 
2 the longest, 3 and 4 placed on the upper and lower edges respectively. Posterior tibiw very broadly 
arcuato- dilatate, emarginate at the apex externally. 
Length 21, breadth 1% millim. 
Hab. Panama, Volcan de Chiriqui 4000 feet (Champion). 
One specimen. Recognizable from the other black forms with coarse elytral 
sculpture by the very broadly arcuato-dilatate posterior tibie. The white scutellar 
spot is a little smaller than in the Mexican 7. guinquedentatus. 
2. Tachygonus quinquedentatus, sp.n. (Tab. VIII. figg. 13, 13 a.) 
Rhomboidal, broad, shining, black, the rostrum ferruginous at the tip, the antenne and the anterior and 
intermediate legs testaceous ; somewhat thickly clothed with long, rather coarse, erect, blackish sete, 
