ZAGLYPTUS.—PLOCAMUS. 34] 
One specimen, somewhat immature. Closely related to Z. crispus; the sete more 
erect, the prosternum distinctly sulcate and with a shallower subapical groove, the 
median carina of the prothorax longer. Larger and broader than the N.-American 
Z. striatus, Lec., the rostrum longer and less curved, the prothorax distinctly carinate, 
the elytra with coarser seriate punctures and broader interstices. 
4. Zaglyptus minutissimus, sp. n. 
Short, rhomboidal, rufo-testaceous, clothed with scattered fine, erect, pallid sete. Head dull, alutaceous ; 
rostrum curved, about as long as the head and prothorax, slightly thickened towards the base, dull and 
finely striate, smoother and shining at the tip, the antenne inserted at about the middle. Prothorax 
short, conical, constricted in front, closely, finely punctate, and with a very fine median carina. Elytra 
shining, punctato-sulcate, the interstices convex and very little wider than the striz. 
Length 1-14, breadth ?-3 millim. 
Hab. Guatemata, Senahu (Champion), Trece Aguas (Schwarz and Barber, in U.S. 
Nat. Mus.). 
Four specimens, all from Alta Vera Paz, two of them with the prothorax dull and 
alutaceous, and the punctures very shallow, this being probably due to immaturity. <A 
close ally of the N.-American Z. striatus, Lec., but differing from it in the more curved 
rostrum, the smoother, feebly carinate, duller prothorax, the convex elytral interstices, 
and the shorter and finer sete. ‘These two insects are amongst the smallest known 
Barids. 
PLOCAMUS. 
Euchetes, Leconte, Proc. Am. Phil. Soc. xv. p. 319 (1876) (nomen preoce.). 
Plocamus, Leconte, loc. cit. p. 820 ; Casey, Ann. N. York Acad. Sci. vi. pp. 469, 681 (1892). 
Eunyssobia, Casey, loc. cit. pp. 469, 679. 
The genera Euchetes and Plocamus were each based upon a single N.-American 
form, both of which extend southward into the “ tierra caliente” of Guatemala; but 
they cannot be maintained as distinct, the two new species now added forming a 
connecting-link between them. Plocamus,as noted by Casey, will probably have to be 
referred to a separate group of the Barini, the mandibles and rostrum being peculiarly 
shaped; the third tarsal joint is small, and the body is strongly setose, as in Zaglyptus, 
near which the genus can be placed for the present. ‘Ihe four species, two of which 
possess a somewhat remarkable geographical distribution, may be grouped thus :— 
Prothorax uneven, nodose. 
Rostrum abruptly thickened towards the base, at least in the ¢. 
Upper surface with very long, erect, rigid sete... - + + + ee echidna, Lec. 
Upper surface with short, stout, clubbed sete . . . . . . + + + « Clavisetis, sp. n. 
Rostrum gradually widened towards the base; upper surface with short, fine, 
blunt sete... ee ee es hispidulus, Lec. 
Prothorax even; rostrum gradually widened towards the base; upper surface 
with very long, erect, rigid sete. 2 6. 6 ee + we ee ee ee hystrix, sp. n. 
