12 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 94 



punctured, the median area puncture-free ; vestiture moderately long 

 but sparse. 



Male. — Antennal club about one-fifth longer than second to seventh 

 segments combined. Abdominal sternites not noticeably modified, 

 sixth with the free margin slightly produced at middle. Pygidium 

 moderately strongly convex in basal half, which is rather coarsely 

 but not densely punctured, apical half less convex, shining, nearly 

 puncture-free, the extreme apex not strongly reflexed. Anterior 

 tibia long and slender, bidentate with a feeble indication of a third 

 tooth, second segment of anterior tarsus narrow, about four times 

 as long as wide. Aedeagus, figure 4. 



Female. — Antennal club as long as second to seventh segments 

 combined. Abdominal sternites convex, not modified, the sixth with 

 its free margin produced at middle in a small triangular process. 

 Pygidium with a moderately deep, transversely oval depression cover- 

 ing almost the entire apical three-fifths, the apical margin slightly 

 produced, basal portion sparsely and moderately coarsely punctured. 

 Anterior tibia short and broad, distinctly tridentate. 



Length. — 13.5 to 15 mm. 



Type locality. — Cano Saddle, Gatun Lake, Canal Zone. 



Ty/>^.— U.S.N.M. no. 51042. 



Material e.ramined. — Type (male) and three paratypes (males 

 and females) from the above locality, collected May 8-12, 1923, R. C. 

 Shannon; one paratype (female) from Barro Colorado Island, 

 Panama, June 25, 1933, J. D. Hood. 



This broad species, when fresh and without grease, has a very 

 distinctive appearance due to the bicolored pronotum. In greasy 

 specimens the disk of the pronotum appears nearly black, while the 

 flanks and elytra are moderately dark brown. 



CHLAENOBIA PERSONATA, n. sp. 



Head coarsely and densely punctured except on vertex, clypeo- 

 frontal suture deeply impressed, bisinuate, frons with a short median 

 impressed groove extending backward a short distance from the 

 clypeofrontal suture, outer third of clypeus gradually reflexed, an- 

 terior margin broadly and shallowly emarginate at middle. Antenna 

 ten-segmented. Pronotum transverse, side margin obtusely angulate. 

 just before the middle, lateral margin feebly sinuate near posterior 

 angle as viewed from side, viewed from above the anterior angles 

 are obtuse and rounded, the posterior angles subacute, surface mod- 

 erately coarsely and rather irregularly punctured. Scutellum equi- 

 lateral, side margin curved, surface sparsely and rather coarsely 



