FOSSIL COLEOPTEBA 25 



approached only by B. schucherti and B. cremastorhynchoides. 

 From both of these, it may be distinguished by the distinct 

 transverse sculpture of the interstrial spaces. It approaches the 

 recent B. transversa in several features, and like that species has 

 a distinct humeral callus, but this is more strongly punctured in 

 the fossil. 



B. CREMASTORHYNCHOIDES n. sp. (Plate VI, Fig. 5.) Form rather 

 elongate and but slightly arched above. Head finely and distinctly but not 

 very deeply punctured, the punctures separated by less than their own 

 diameters. Eye, not shown in the figure, moderately large, transverse. 

 Beak not defined. Prothorax more coarsely and deeply punctured than the 

 head. Elytra punctured in rows, the puncta circular and deep, ordinarily 

 separated by a little less than their own diameters, interspaces nearly flat 

 and not hairy nor punctate. Under surface of meso- and metathorax 

 sculptured similarly to the prothoracic disk, but somewhat less closely, 

 ventral segments much smoother, scarcely visibly punctate, the first and 

 second segments long, the next two short, first suture strongly sinuate at 

 sides, second and third bent at tips. Legs short but not distinct enough 

 for description. Length, 4.60 mm. 



This insect is strikingly like CremastorJiynchus stahilis, de- 

 scribed from the Florissant shales, which has been placed in the 

 Anthonomini by Dr. Scudder. The present species differs es- 

 sentially in having the abdominal segments very unequal in 

 length. It seems best placed in the Barini, but is most likely not 

 a true Baris in the restricted sense, the form being more nearly 

 that of Limnoharis. 



Centrinus Schonh. 



C. VULCANicus Wiclh. (Plate VII, Figs. 4, 5.) A fine specimen of the 

 insect described by me as Dorytomus vulcanicus (Bull. Amer. Mus. Nat. 

 Hist., XXXI, p. 48, pi. IV, fig. 1) indicates the propriety of removing it 

 from Dorytomus. The appearance of a strong tooth on the front femur of 

 the original example is illusory, though this character was the chief one 

 upon which the generic reference was made. A new figure and details are 

 given herewith, showing some features not to be made out in the first ex- 

 ample studied. It will be noted that in the gradually formed club, the 

 antennal structure is similar to that figured by Dr. Scudder for his C. 

 obnuptus. Compared with recent forms in my cabinet, it seems closest to 

 C. (Odontocorynus) denticornis. 



C. OBNUPTUS Sciidd. (Plate VII, Fig. 6.) A fine example of this insect 

 is contained in the collection and offers an opportunity for a figure showing 

 some additional details. 



