NEW BARK BEETLES BLACKMAN 363 



rounded in front, anterior margin not serrate; anterior area with 

 broad, low asperities and short, stout, spatulate setae ; summit moder- 

 ately high, at middle; posterior area nearly horizontal, surface shin- 

 ing, reticulate, sparsely, shallowly, finely punctured, with short, fine 

 hairs. 



Elytra equal in width to pronotum and 1.86 times as long, 1.79 

 times as long as wide; sides subparallel well behind middle, narrowly 

 rounded behind; surface subshining, faintly reticulate; strial punc- 

 tures in regular, not impressed rows; interspaces narrow, with very 

 fine uniseriate punctures, each bearing a fine, erect hair. Declivity 

 convex, strial punctures slightly smaller than on disk, each bearing a 

 minute hair; interspaces with much finer punctures bearing short, 

 erect, narrowly clavate setae, much more conspicuous than on disk. 



Male. — Shorter than female and considerably stouter, 0.97 mm. 

 long, 2.43 times as long as wide; frons convex above, transversely 

 flattened below, surface subopaque, reticulate, finely punctured; pro- 

 notum with anterior margin distinctly serrate; elytral vestiture 

 coarser and more abundant, especially on declivity. 



This species is rather closely allied to Cnjptocleptes dislocatus 

 Blackmail but is slightly stouter, with elytra more narrowly rounded 

 behind and declivital vestiture not so coarse, and the detailed struc- 

 ture of frons, antenna, etc., shows considerable differences. 



Type locality. — Brownsville, Tex. 



Host. — Acacia berlandieri Benth. 



Type material. — Holotype, allotype, and 44 paratypes, U.S.N.M. 

 No. 56413. 



The type series was reared from the limbs of Acacia berlandieri col- 

 lected at Brownsville, Tex., August 1904, by H. S. Barber. 



CHALCOHYUS, new genus 



Genotype. — Chalcohyus securigerus, new species. 



Resembling certain species of Cryptocleptes in habitus but stouter ; 

 head concealed from above, frons flattened, weakly concave in female ; 

 antennal club securiform, with distal end pointed, sutures obscure; 

 funicle 6-segmented, segments not widened distally, loose jointed, as 

 long as or longer than club and scape together in female, not so ex- 

 cessively long in male; fore coxae nearly contiguous, fore tibia (fig. 

 22) slightly narrower distally, distal end very obliquely truncate with 

 three submarginal teeth, mucro thick, flattened, recurved and notched 

 at end ; pronotum and elytra somewhat similar to those of Thysanoes 

 in sculpture and vestiture. 



