10 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 94 



pit itself. Apical margin strongly produced in an acute, reflexed lip. 

 Anterior tibia tridentate. 



Length. — 13 to 14.5 mm. 



Type locality. — \'enodio, Sinaloa, Mexico. 



Type. — U.S.N.M. no. 51041. 



Material examined. — Type (male) and 35 paratypes of both sexes 

 collected at the type locality June 10-15, 1918, Kusche, donated to the 

 National Museum by B. P. Clark ; one male paratype from Sinaloa, 

 Mexico, without further data. 



In the 37 specimens before me, 3 show a partial division of the 

 fourth antennal segment into two segments on one or both sides of the 

 insect. In no case is the division complete on both sides of the same 

 specimen and in the other specimens both antennae are without doubt 

 nine-segmented. 



CHLAENOBIA LATIPES Bates 



ChlaeJiobia latipcs Bates, 1888, Biol. Centr.-Amer., Coleopt., vol. 2, pt. 2, p. 167. 

 Chlaenobia bicallosa Bates, 1888, loc. cit., p. 168. 



Head rather densely and moderately coarsely punctured on frons, 

 region adjacent to the feebly impressed but strongly bisinuate clypeo- 

 frontal suture more sparsely punctured. Frons slightly convex. An- 

 tenna ten-segmented. Pronotum transverse, side margins obtusely 

 angulate well before the middle, lateral margin sinuate just before 

 posterior angle as viewed from side, viewed from above anterior 

 angles narrowly rounded, posterior angles acute and slightly produced ; 

 punctures a little coarser than those of head, rather sparsely and ir- 

 regularly distributed. Scutellum equilateral, sides curved, with a few 

 scattered punctures. Elytra with sutural margins strongly tumid, 

 discal costae feebly indicated ; punctures finer and more densely 

 placed than on pronotum, epipleura very narrow, obsolete toward 

 apex. Metasternum moderately coarsely and densely punctured, vesti- 

 ture moderately long and suberect. 



Male. — Clypeus deeply concave, rather coarsely and densely punc- 

 tured, subtrapezoidal, anterior margin feebly emarginate. Antennal 

 club half again as long as second to seventh segments combined. Sixth 

 sternite broadly and shallowly impressed, its free margin broadly 

 rounded and slightly produced. Pygidium transverse, slightly convex, 

 median area slightly impressed, apex transverse, slightly Hpped. An- 

 terior tibia slender, bidentate, second segment of anterior tarsus 

 broadly oval, less than twice as long as wide. Aedeagus, figure 3. 



Female. — Clypeus feebly concave, coarsely, densely and somewhat 

 confluently punctured, biarcuate with median indentation shallow. 



