FOSSIL COLEOPTERA 



Hylastes Erichs. 



27 



H. AMERICANUS n. sp. (Plate VI, Fig. 10.) Form only moderately 

 elongate for this genus. Head finely scabrous, eye not defined, antenna 

 showing well the sub-spherical club. Prothorax, in side view, not much 

 arcuate on the dorsal line, the surface regularly sculptured with fairly deep, 

 rounded, approximate punctures of moderate size. Elytra about twice as 

 long as the prothorax, punctate in stria?, the punctures sub-transverse, 

 moderately close-set and deep. Abdomen punctured, but less strongly than 

 the elytra. Legs short, the tibiae moderately expanded. Length, 4.50 mm. 



This seems fairly close in appearance to the recent H. caver- 

 nosus. The tibiae are not well enough preserved to show the 

 toothing if it were present. The genus is well distributed and 

 contains a moderate number of species. 



Hylurgops Lee. 



H. PiGER n. sp. (Plate VII, Fig. 8.) Form stout. Head rather finely 

 punctato-scabrous, eyes and antennae not definable. Prothorax with the 

 dorsum only slightly arched, the surface very closely sculptured with deep 

 rounded punctures, more or less confluent on the disk but hardly so near 

 the flanks. Elytra about two and one-third times the length of the pro- 

 thorax, with well-marked striae, each of which is beset with a row of large, 

 deep, approximate, rounded punctures. There is some evidence that these 

 striae are set off in pairs by the elevation of the alternate intervals. Under- 

 side of abdomen and thorax distinctly punctured, the former much more 

 strongly. Legs short, tibiae broad. Length, 3.45 mm. 



The generic assignment is made upon the facies. The elytral 

 sculpture is strikingly like that of the recent H. subcostulatus, 

 from California and Arizona, this species being matched almost 

 exactly in size as well by the fossil. 



Brachytarsus Schdnh. 



B. (?) DUBius n. sp. (Plate IV, Fig. 14.) Form about as in the recent 

 common B. variegatus, the prothorax a little more rounded at the sides. 

 Head not visible. Pronotum closely and regularly sculptured with moderate 

 sized, rather shallow, round punctures. Elytra punctatostriate, the punctures 

 elongate but not very deep. Length, 2.90 mm. 



Characters for exact classification are not available, and the 

 assignment is made chiefly upon facies. Compared with B. varie- 

 gatus, the fossil has the prothorax much more regularly and 

 closely punctate, somewhat as in the European Arceocerus fas- 

 ciculatus. The elytral stride are fine and the punctures very 

 decidedly elongate. 



