24 PSELAPHIDA. 
with less swollen maxillary palpi, and has a narrower head, the two fovee on the vertex 
being consequently less distant. It also possesses well-marked male characters; in this 
sex the middle femur is angularly swollen to beyond the middle and beyond this 
emarginate-foveolate ; and the front tibia also is a little angularly dilated above. 
The Mexican habitat of this species, as well as the Nicaraguan one, rests in each 
case on a single female; both require confirmation. I have also a female found by 
Prof. Trail in the Amazons valley that apparently belongs to this species. 
5. Decarthron similare. 
Lete rufo-testaceum, nitidum, subtiliter pubescens ; antennis parum elongatis. 
Long. 14 millim. 
Hab. Guatemata, Champerico (Champion). 
This species is distinguished from D. restitutwm apparently only by the sexual cha- 
racters, these being very different. The male has the middle femur inflated to beyond 
the middle, and with the extremity subconstricted; the middle tibia has a thick mucro 
at its internal apical angle ; and the metasternum has a broad depression in the middle 
behind, the depression densely covered with an extremely fine, pallid, silky pubescence. 
The unique example was found upon the sea-coast. 
6. Decarthron curticorne. 
Bryaxis curticornis, Schauf. Nunq. Otios. i. p. 263°. 
Hab. Mexico, Yucatan !. 
7. Decarthron denticorne. 
Bryazxis denticornis, Schauf. Sechzig neue Pselaph. p. 15°. 
Hab. Mexico, Yucatan t. 
The condition of the thorax is not described, and I therefore can only guess at the 
position of the species. D. denticorne has apparently a peculiar structure of the head. 
BRYAXIS. 
Bryaxis, Leach, Zool. Misc. ii. p. 85 (1817) ; Leconte, Tr. Am. Ent. Soe. viii. p. 181 (1880) ; 
Reitter, Verh. Ver. Briinn, xx. p. 190 (1882). 
This is a very extensive genus of which more than two hundred species have already 
been described; it has a very wide distribution. Reitter (/. ¢.) does not admit in 
Bryaxis any form that has not a dorsal stria as well as a sutural stria on each elytron ; 
but in the species of our region we have the passages from a delicate dorsal stria to its 
complete absence ; I have therefore been obliged to abandon the use of this character 
as being of generic importance. The species I have placed in the second section 
are most probably not really congeneric with those of the first section; but as they are 
