5IO Memoirs on the Coleoptera 



of this genus is Zygobaris xanthoxyli Pierce, and the Mexican Z. 

 tristicula Chmp., also belongs here, Zygobaris nitens Lee, is at 

 present the only species assignable to the true Zygobaris. 



Neocratus n. gen. 



The body in this genus is somewhat larger than in Zygobaris, 

 with much larger and longer prothorax and very different sculpture. 

 The beak is long but thick and strongly sculptured, the mandibles 

 similarly decussate, the antennal funicle unmodified apically, the 

 club abrupt, rather small and gradually pointed, with its first 

 joint about half the mass. The prosternum is flat and unmodified, 

 unarmed in the male, the coxae well separated and the tarsal claws 

 approximate, becoming strongly connate basally as in Zygobaris. 

 The scutellum is smooth, obovoidal and strongly rounded at tip. 

 The type is the following: 



*Neocratus nudus n. sp. — Evenly rhomboid-oval, strongly convex, 

 polished, black and completely glabrous above, the coarse punctures of 

 the under surface — smaller and sparser on the abdomen — each enclosing 

 a very small and slender squamule; the prosternum is clothed with 

 dense elongate ochreous scales; legs, beak and antennae black; beak in 

 the male, thick, feebly tapering, shining though coarsely sculptured 

 throughout, strongly, subevenly arcuate and a little more than half as 

 long as the body, the antennae near four-sevenths, the scape far from 

 attaining the finely faceted eyes; prothorax barely a fourth wider than 

 long, the sides evenly converging and very evenly, moderately arcuate 

 from base to the moderate apical constriction, the subtubulate apex but 

 slightly more than a third as wide as the base, the basal lobe abrupt, 

 moderate in size, with its apex truncate at the scutellum; punctures 

 well separated, fine medially, gradually becoming coarser laterally, 

 forming coarse rugae at the sides and on the propleura; elytra very broad, 

 only a fifth or sixth longer than wide, subtriangular, with evenly arcuate 

 sides and rather narrowly rounded apex, at the prominent humeri 

 distinctly wider than the prothorax and only one-half longer; striae 

 moderately coarse, not very abrupt, finely punctate along the bottom; 

 intervals between two and three times as wide as the striae, not very 

 flat, coarsely, closely and confusedly punctate, less coarsely and more 

 loosely toward the suture; abdomen of the male distinctly impressed 

 medio-basally. Length (d^) 4.5 mm.; width 2.35 mm. Mexico (Fron- 

 tera, in Tabasco), — Townsend. 



Possibly this species may have been described, but I can find 

 nothing resembling it in the work of Mr. Champion. 



