OF i lit; i M rED E i \ pes. 



heviss. Dej.) How far some of the other genera of Chaudoir's "Stomites" correspond in 

 characters with it, must he left for others to determine; it may he here remarked, that 

 ( baudoir'a group is evidently very artificial, and alter a careful a imparison of Storais with 

 Promecognathus, I find no reason whv the former should he removed from the Pteros- 

 tichi, with which Erichson associated it. The following are the characters seen in Pro- 

 mecognathus. 



The anterior tibia? are slightly dilated, and deeply emarginate : the middle tibisa are pu- 

 bescent: the prosternum is not produced posteriorly; the parapleural have no trace of a 

 posterior appendage; the marginal stria and punctures of the elytra are verj close to the 

 margin; the mandibles arc long and prominent; the labrum is short and bisinuate as in 

 S !ite- : the mentum is very transverse, not deeply emarginate, with the tooth large; the 

 ligula appear- broad; the paraglossia narrow and short; the first lour joints of the antenna- 

 are shining, the first much larger than the others; the remaining joints are covered with 

 pubescence longer and less dense than usual. The tarsi of the males are not dilated. 



This group seems to he the passage from the Brosci to the Scaritidcs, having a slighl 

 tendency towards Cychrus. 



t. Scar it ides (genuini.) 



This group is abundantly distinguished from all others by the fossorial palmated anterior 

 tibiae, and by the subgeniculatc antenna 1 , which have the first joint very long. 



The parapleural have the usual appendage \en indistinct and sometimes wanting; the 

 .-trie of the elytra are usually obliterated; the marginal groove is entire, and usually gra- 

 nulated to such an extent, as to obscure the series of occllatc punctures, which are in their 

 normal position, not approximated to the margin. In some genera of this group the max- 

 ilhe are rounded at the extremity, the ordinary book being completely wanting; the head 

 is broadly sulcate below the ey< . - > thai the antennae can be folded backwards; the men- 

 tum is trilobed, the middle lobes being nearly as long as the lateral lobes; the ligul 

 broad and rounded in Pasimachus, concave and truncate in Scariti . 1 be thorax is trun- 

 cate behind, with distinct angles, as in Pasimachus, or pedunculate as in Scarites; the tarsi 

 of the males arc not dilated. The anterior tibisa are always emarginate internally. The 

 foreign genera appear to have been founded uponver* Blight characters, and might proba- 

 bly be diminished in number by careful comparison. 



In my monograph of Pasimachus, (Ann. Lye. I, I H,) I have proposed two species, which 



a larger scries of Bpeci is has proved to be badly founded: they are P.assimilis and P. 



rugosus, which must he united with P. aublffivis. Pasimachus Californicus Chaud (Bull. 

 Mo.., 1850,) is most probably 1'. punctulatus Hald, which is known to me a 

 w< si as I tah. The following is new. 



I'. duplicates, bhoraco posticc subangostato, et ntrinqne impresso, lateriba* r^>- 



tun I le marginatis, angnlia posticis parvis rcctis, i fctim punc- 



tata, sericbus pcrparia approximatis, versus margincm bicostatis. Long. L'O 1*18. 



Creek boundary, Missouri Territory, collected by Dr. Woodhouse This L p' i i 

 very similar to P. obsoletus Lee., bul is larger; the thorai cordiform, the | 



