TACHYGONUS. 133 
with a few white sete intermixed, the sides of the prothorax, and of the meso- and metasternum, and 
a rounded scutellar patch on the elytra, thickly set with pectinate whitish scales, the suture with an 
imbricate row of rather coarse, decumbent, whitish sete; the posterior legs strongly setose, the sete 
on the tibis and outer half of the femora black, the others white, the vestiture of the anterior and inter- 
mediate legs also white. Prothorax rather sparsely punctate, except along the broad smooth median 
space. Elytra broad, transversely cordate ; seriato-foveolate, the interstices very narrow, somewhat 
raised, and asperate, the setee each arising from a small conical prominence. Posterior femora very 
elongate, armed with three long and two shorter teeth—2 the longest, 3 and 4 a little shorter, placed 
one on the lower and one on the upper edge, 1 slightly longer than 5, the latter short. Posterior tibie 
rather broad, arcuate. 
Length 23, breadth 23 millim. 
Hab. Mexico, Atoyac in Vera Cruz (H. H. Smith). 
One specimen, in perfect condition. Distinguishable by the abundant black setosity, 
‘the large white scutellar spot, the imbricate row of white sete along the elytral suture, 
and the 5-dentate posterior femora. ‘The seriate punctures of the elytra are large and 
foveiform, as in several of the allied forms. 
3. Tachygonus curvicrus, sp.n. (Tab. VIIL fig. 14, hind leg.) 
Rhomboidal, shining, black, the rostrum ferruginous, the antenne, anterior and intermediate legs, and apical 
joint of posterior tarsi, testaceous ; sparsely clothed with very fine, erect, fuscous sete, the pygidium with 
white hairs, the flanks of the prothorax and of the meso- and metasternum, and a rather large scutellar 
patch on the elytra, thickly set with pectinate whitish scales ; the posterior femora and tibiz fusco- 
setose, the vestiture of the rest of the legs white. Prothorax thickly punctate, except along the narrow 
smooth median space. Elytra very broad, transversely cordate, rapidly narrowed from a little before 
the middle ; seriato-foveolate, the interstices very narrow and somewhat raised. Posterior femora very 
elongate, armed with four teeth—1 long and slender (broken off on left femur), 2 very long and curved, 
3 and 4 shorter than 1, placed on the upper and lower edges respectively. Posterior tibiw rather broad, 
arcuate. 
Length 21,, breadth 1? millim. 
Hab. Mexico, Toxpam in Vera Cruz (Sal/é). 
One rather worn specimen, damaged by the pin. Smaller than 7. quinguedentatus, 
the prothorax more closely punctate, the setosity finer and sparser, the imbricate 
whitish sete along the suture wanting, the posterior femora with the third and fourth 
teeth placed close to the second and the outer (fifth) tooth absent. 
4. Tachygonus semirufus, sp.n. (Tab. VIII. figg. 15, 15 a.) 
Rhomboidal, shining, ferruginous, the head, a patch on the disc of the prothorax, a curved transverse fascia 
below the base of each elytron (and in one specimen an oblong patch below it near the suture), the 
under surface, the femoral spines, and the posterior tibie and tarsi in part, piceous or black; somewhat 
thickly clothed with long, fine, erect, pallid sete intermixed with a few decumbent white hairs, these 
latter condensed into an imbricate series along the suture; the sides of the prothorax and of the meso- 
and metasternum, the shoulders, a narrow curved fascia on each elytron below the transverse black 
patch, extending down the middle of the disc, and various other small scattered patches towards the sides 
and apex, set with pectinate white scales; the sete on the hind legs in great part white. Prothorax 
somewhat closely punctate, the smooth median line just traceable. Elytra broad, transversely cordate, 
widening below the shoulders and then rapidly and obliquely narrowed to the truncated apex ; coarsely 
