TACHYGONUS. 135 
7. Tachygonus bifasciculatus, sp. n. (Tab. VIII. figg. 18, 18a, 4, 2.) 
2? Rhomboidal, shining, black, the rostrum, antenne, anterior and intermediate legs, tip of the hind tarsi, 
apical margin of the elytra, and suture (faintly), testaceous or ferruginous; somewhat thickly clothed 
with very long, erect, fuscous and pallid setz, the fuscous sete on the prothorax clustered into two dense 
fascicles near the base ; the sides of the head and prothorax, and of the meso- and metasternum, two 
broad, coalescent, transverse fasci@ on the elytra, extending along the suture to the base and apex, and 
the ventral segments in part, set with ochreous and whitish pectinate scales, the whitish scales clustered 
into a tuft on the second elytral interstice below the base and another on the fifth beyond the middle; 
the legs with white and fuscous sete and pectinate white scales. Rostrum bare, smooth along the middle. 
Prothorax closely, finely punctate, except along the broad, smooth, basally dilated median space. Elytra 
very broad, transversely cordate; coarsely and closely punctate-striate, the interstices narrow and rather 
convex. Posterior femora very elongate, armed with three pairs of spines, the first pair very long. 
Posterior tibie broad, strongly arcuate, subangulate externally at about one-third from the base. 
do? The head, the sides of the prothorax broadly, the suture, apical margin, humeri, and a common transverse 
fascia before the middle of the elytra, the posterior femora at the apex and towards tho base, and the 
base of the posterior tibiee, ferruginous. The rostrum with the basal half albo-squamose. 
Length 2;,-22, breadth 13-2 millim. 
Hab. Guatemata, Capetillo (Champion). 
Two specimens, apparently belonging to the same species, and differing only in 
colour, the male somewhat abraded. The two dense fascicles of erect blackish setz on 
the prothorax, the closely punctate-striate elytra, set with many pectinate scales (which 
are clustered into two tufts on each elytron), and the peculiar armature of the hind 
femora, readily distinguish 7. bifasciculatus. 
Its nearest allies are the N.-American 7. lecontei, Gyll., and 7. spinipes, Casey, and 
the Mexican 7. fasciculosus, Boh. 
8. Tachygonus pectinisquamis, sp.n, (Tab. VIII. figg. 19, 19 a-c.) 
Short ovate, shining, black, the antennze and the tips of the tarsi testaceous ; somewhat thickly clothed with 
long, fine, erect, blackish sete, with white sete intermixed, those along the apical portion of the suture 
imbricate ; the prothorax with a spot near each hind angle and the flanks, the elytra with a broad space 
across the middle sparsely, and the sides of the meso- and metasternum more densely, set with pectinate 
white scales (fig. 19 a), the elytra also with a narrow dense patch of pale ochreous pectinate scales on 
the suture below the base; the anterior and intermediate legs albo-pilose and fusco-setose, the posterior 
legs densely fusco-sctose, the basal half of their femora with white sete and pectinate white scales. 
Prothorax sparsely, finely punctate, except along the smooth median space. LElytra rounded-subquadrate, 
about as broad as long, gradually, arcuately narrowing from the middle ; with rows of closely-placed sub- 
quadrate punctures separated by narrow, smooth, rather convex interstices. Legs comparatively stout ; 
posterior femora extending a little beyond the apex of the abdomen, armed with a single prominent 
slender tooth ; posterior tibice sinuate; posterior tarsi broad. 
Length 2,45, breadth 13 millim. 
Hab. Mexico, Jalapa (Hége). 
One specimen. ‘This species may be readily identified by the rounded-subquadrate 
elytra, with scattered pectinate white scales extending across the median third and a. 
large ochraceous post-scutellar patch, the comparatively short, very hairy hind legs, the 
posterior femora armed with a single tooth, the posterior tibie sinuate. 
