50 



2. — Black, legs red. 3. 



Black, base of antenna?, palpi, legs and sides of prothorax and elytra yel- 

 low. 72. limbatus. 

 3. — Stria? of elytra strongly punctured. 73. crenistriatus. 



Stride of elytra feebly punctured. 74. rubripes. 



F. — Prothorax oval, margin narrowly reflexed, hind angles round- 

 ed, pubescence of antennae beginning on 3rd joint; elytral .stria* 

 fine, dorsal punctures 4-6 small ; tarsal grooves indistinct. 



Prothorax not longer than wide. 2. 



Prothorax longer than wide ; legs testaceous. 3. 



2. — Legs testaceous : color piceous with brassj^ gloss. 76. sordens. 



Legs and antennae dark ; tibia? and tarsi sometimes piceous : color black. 



77. picicorni£' 

 8. — Prothorax narrower behind ; with side-margin more widely reflexed. 4 



Prothorax elongate -oval, side-margin uniformly narrow. .">. 



4. — Antenna? darker at base, paler externally. 78. nifieornis. 



Antennas uniform rufo-testaceous. 79. retractus. 



5. — Black, antenna? piceous, size larger. 80. gemellus, n. sp. 



Black, antenna?, legs and elytra piceo-testaceous. 81. picipennis. 



Black, colored like picipennis, but prothorax also piceo-testaceous. 



82. lutulentiis. 



G. — Prothorax elongate-oval, truncate before and behind, margin 

 very narrowly reflexed : pubescence of antenna? beginning on the 

 4th joint; elytra with fine stria?, dorsal punctures 4, small, tips not 

 sinuate ; tarsal grooves indistinct: the last joint of the maxillary 

 palpi is long-er and more ovoid than in the other species, and the 

 claws are larger. Otherwise it is closly related to F. 



Elongate, testaceous, head black ; prothorax with a longitudinal dark 

 stripe; hind angles rounded: scutellum and sometimes the suture 

 dusky. 83. nigriceps. 



REMARKS. 



On careful study the genus Anchus established by me (Proc. 

 Ac. Nat. Sc. Phil. 1854, 38.) upon a singular insect, A. pusillus, 

 and afterwards united with Platynus, seems not only worthy of 

 being adopted, but even transferred from the tribe Platynini to 

 Anchonoderini. The prothorax at base is cylindrical, with but 

 slightly prominent hind angles, and the elytra are not sinuate at 

 tip. Although the palpi are more slender than in Anchonoderus, 

 the punctured surface, and the characters above mentioned indi- 

 cate the propriety of its removal from Platynus. 



