286 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.45. 



serially arranged so as to give a striate effect. Antenna with the 

 first joint concealed, the second and third subequal but with the latter 

 a little more slender, fourth, fifth, and sixth gradually a little broader, 

 seventh much larger, eighth small, ninth about the size of the sev- 

 enth, tenth similar to the ninth, eleventh a little narrower and 

 rounded at the tip. Length, 3.35 mm. Height, at base of elytra, 

 1.70 mm. 



Type.— Cat. No. 59633, U.S.N.M. 



One specimen. In general build, it seems nearer A. valida than 

 to any of the other recent North American species, but differs in 

 sculpture and in leg structure. The antenna exactly answers the 

 characters of the genus, a^ will be seen by reference to the figure. 



ALEOCHAROPSIS, new genus. 



This name is proposed for a magazine genus to contain fossil forms 

 of an Aleocharinid facies but of undetermined affinities. The type 

 is A. caseyi, described below, which has a general likeness to some 

 of the large recent Aleocharini, notably to Maseochara, but differs in 

 the shorter antennae, the thoracic outline and the long setse of the 

 pronotal disk. It agrees with the genera related to Maseochara and 

 Baryodma in the short elytra and, the long blunt strongly margined 

 abdomen, with apparently seven exposed segments, the basal portion 

 being uncovered because of the brevity of the wing covers. 



. ALEOCHAROPSIS CASEYI, new species. 

 Plate 22, fig. 4. 



Form elongate and rather slender, subparallel. Head not very 

 well preserved, the shape distorted. Eye apparently small but not 

 distinctly shown. Antennae, one of which is complete, only as long 

 as the head, moderately incrassate distaUy. Prothorax, as preserved, 

 nearly one and a half times as broad as long, broader at apex than 

 at base, a long seta in each anterior angle, sides regularly arcuate, 

 the greatest width slightly in front of the middle, all the angles ob- 

 tuse. Elytra strikingly small, about as long as the prothorax, the 

 length of each elytron approximately equal to one and one- third 

 times its own breadth. Abdomen longer than all the rest of the 

 body, distinctly margined at sides, the apical appendages presuma- 

 bly indicated by a cloud in the position usually occupied by these 

 structures. Sculpture of the head, prothorax, and elytra probably 

 very fine, since no definite characters can be made out except a few 

 scattered punctures which may belong to the stone, the abdominal 

 segments minutely scabrous, distinctly and rather strongly hairy 

 along the posterior margins and with a few somewhat longer hairs 

 projecting from the sides. Length, exclusive of apical cloud, 10.80 

 mm.; of head, 1.40 mm.; of prothorax, about the same; of elytra, 

 a very little more. Width of elvtra, conjointly, 2.40 mm. 



Type.— Cat. No. 59634, U.S.N.M. 



