214 J. L. LECONTE, M. D. 



that localization of power, which is so frequently mentioned by Prof. 

 Dana in his works on Cephalization. 



Renewed examination of Distenimus Argus^ shows it to be an 

 Omalium, nearly related to the European 0. planum. The first four 

 joints of the tarsi are so short and closely united as to appear like two 

 joints as in Trogophlceus^ and the four together are barely one-third 

 as long as the last joint. It therefore corresponds with Phloeostiha 

 Thomson. Without having studied the tribe Omalini closely, I am 

 inclined to think the narrow, depressed form, and the peculiar sculp- 

 ture, which consists of anastomosing lines forming narrow meshes, 

 would warrant the retention of this group of species as a distinct 

 genus. 



OXYPORUS Gray. 

 The following table will enable our species to be easily recognized. 

 I have two new species to add to those mentioned and tabulated by 

 Fauvel,* and only a few references to descriptions which are not 

 cited in the Munich Catalogue. 



Elytra with the sides finely rugose 2. 



Elytra polished, with the usual striae and punctures 3. 



2. — Black, tibise and tarsi pale; elytra pale, suture and sides black. 



1. fenioralis. ' 

 Yellow, head, last two abdominal segments, and great part of elytra black. 



2. elegaus, n. sp. 



3. — Legs black 4, 



Legs yellow 6. 



4. — Sides of prothorax much rounded 5. 



Sides of prothorax feebly rounded, elytra pale, with suture, sides and nar- 

 row vitta black 3. major. 



6. — Elytra bright reddish-yellow, outer apical angle black 4. rufipennis. ■ 



Elytra black 5. stygicus. - 



6. — Hind angles of prothorax, as usual, not flattened 7. 



Hind angles of prothorax flattened, rounded, concave beneath; rufous, head, 

 two spots of prothorax, part of elytra, three last abdominal segments, 



and sides of metathorax black 11. quiuqueinaculatns. - 



7. — Elytra longer and wider than prothorax 8. 



Elytra scarcely longer than prothorax; rufous, head, part of elytra, and 



tip of abdomen above and beneath black 10. lepidus, n. sp. • 



8. — Color variable, elytra pale with sides and suture black 6. vittatus. 



Black above, pale yellovc beneath „ 7. bicolor. • 



Rufous, sides of elytra fuscous 8. lateralis. 



Rufous; spot of head, two of prothorax and part of dorsal surface of abdo- 

 men black; elytra black, each with a triangular rufous spot. 



9. occipitalis. 



* Marseul, Abeille, i, 369, (1864). 



