HlSTERID^E 269 



psyche. I cannot think that neither this species nor tardus has 

 been before the describers of the Mexican species of Saprinus, 

 and conclude that the specimens must have been too hastily 

 assumed to represent the lubricus of LeConte (or plenus?), which 

 on comparison will be seen to resemble them in scarcely any par- 

 ticular; there is a Mexican specimen of lubricus in my collection, 

 taken by Wickham at Monterey. 



Group VIII (patruelis). 

 Subgen. Hypocaccus Thorns. 



I am disposed to unite under this group the species placed by 

 Horn in his Group VIII, and all under Group IX of that author 

 down to ceneipunctatus Horn, the last five species of Group IX- 

 OBneipunctatus, palmatus Say (dimidiatipennis Lee.), gatidens, ser- 

 rulatus and sulcifrons constituting, in our fauna, the valid sub- 

 genus Pachylopus Er. Pachylopus palmatus is abundant on the 

 New Jersey seashore, and I have three examples from Rhode Island, 

 which represent a smaller and especially narrower and more polished 

 variety, with the punctures on the elytra postero-suturally rather 

 more distinct; this may be regarded as the deserticola of Marseul; 

 the latter, as stated by Horn, was described from an erroneous 

 locality. 



In Group VIII, as above extended, there are several sections very 

 well defined by general habitus the sphceroides section, not un- 

 remindful of some of the feebly sculptured species of Groups VI 

 and VII, and the fraternus section, similar in appearance to the 

 preceding lubricus and psyche section, while in lucidulus we have a 

 close approach to Pachylopus. The distinguishing character of the 

 group or subgenus is the strong transverse cariniform frontal line, 

 which extends unbroken from side to side. 



The species are abundant and a considerable number in my 

 collection are still undescribed as follows: 



Saprinus lustrans n. sp. Oblong-oval, convex, very polished and 

 feebly sculptured, blackish-piceous, the legs more rufous; head smooth 

 and impunctate, the front with a transverse reversed trapezoid behind 

 the anterior transverse line; prothorax three-fourths wider than long, 

 the moderately converging long sides but just visibly arcuate, rapidly 

 rounding inward at apex; surface wholly smooth and polished, excepting 

 a longitudinal area, near, but not extending to, the sides, which is sparsely, 



